Browse through the Pfam families on this page.
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| S-AdoMet_synt_C | PF02773.11 | S-adenosylmethionine synthetase, C-terminal domain |
| S-AdoMet_synt_M | PF02772.11 | S-adenosylmethionine synthetase, central domain |
| S-AdoMet_synt_N | PF00438.15 | S-adenosylmethionine synthetase, N-terminal domain |
| S-antigen | PF05756.6 | S-antigen protein |
| S-layer | PF07752.6 | S-layer protein |
| S-methyl_trans | PF02574.11 | Homocysteine S-methyltransferase |
| S1 | PF00575.18 | S1 RNA binding domain |
| S1-like | PF14444.1 | S1-like |
| S1-P1_nuclease | PF02265.11 | S1/P1 Nuclease |
| S100PBPR | PF15427.1 | S100P-binding protein |
| S10_plectin | PF03501.10 | Plectin/S10 domain |
| S19 | PF06756.6 | Chorion protein S19 C-terminal |
| S1FA | PF04689.8 | DNA binding protein S1FA |
| S1_2 | PF13509.1 | S1 domain |
| S4 | PF01479.20 | S4 domain |
| S4_2 | PF13275.1 | S4 domain |
| S6PP | PF05116.8 | Sucrose-6F-phosphate phosphohydrolase |
| S6PP_C | PF08472.5 | Sucrose-6-phosphate phosphohydrolase C-terminal |
| SAA | PF00277.13 | Serum amyloid A protein |
| SAB | PF04382.8 | SAB domain |
| SAC3 | PF12209.3 | Leucine permease transcriptional regulator helical domain |
| SAC3_GANP | PF03399.11 | SAC3/GANP/Nin1/mts3/eIF-3 p25 family |
| Saccharop_dh | PF03435.13 | Saccharopine dehydrogenase |
| Saccharop_dh_N | PF04455.7 | LOR/SDH bifunctional enzyme conserved region |
| Sad1_UNC | PF07738.8 | Sad1 / UNC-like C-terminal |
| SAD_SRA | PF02182.12 | SAD/SRA domain |
| SAE2 | PF08573.5 | DNA repair protein endonuclease SAE2/CtIP C-terminus |
| SAF | PF08666.7 | SAF domain |
| Saf-Nte_pilin | PF09460.5 | Saf-pilin pilus formation protein |
| SAF_2 | PF13144.1 | SAF-like |
| SAG | PF04092.8 | SRS domain |
| SAGA-Tad1 | PF12767.2 | Transcriptional regulator of RNA polII, SAGA, subunit |
| SAICAR_synt | PF01259.13 | SAICAR synthetase |
| Salp15 | PF12115.3 | Salivary protein of 15kDa inhibits CD4+ T cell activation |
| Salt_tol_Pase | PF09506.5 | Glucosylglycerol-phosphate phosphatase (Salt_tol_Pase) |
| SAMP | PF05924.6 | SAMP Motif |
| SAM_1 | PF00536.25 | SAM domain (Sterile alpha motif) |
| SAM_2 | PF07647.12 | SAM domain (Sterile alpha motif) |
| SAM_adeno_trans | PF01887.11 | S-adenosyl-l-methionine hydroxide adenosyltransferase |
| SAM_decarbox | PF01536.11 | Adenosylmethionine decarboxylase |
| SAM_MT | PF04445.8 | Putative SAM-dependent methyltransferase |
| SAM_PNT | PF02198.11 | Sterile alpha motif (SAM)/Pointed domain |
| SAND | PF01342.16 | SAND domain |
| SANTA | PF09133.5 | SANTA (SANT Associated) |
| SAP | PF02037.22 | SAP domain |
| SAP18 | PF06487.7 | Sin3 associated polypeptide p18 (SAP18) |
| SAP25 | PF15476.1 | Histone deacetylase complex subunit SAP25 |
| SAP30_Sin3_bdg | PF13867.1 | Sin3 binding region of histone deacetylase complex subunit SAP30 |
| SapA | PF02199.10 | Saposin A-type domain |
| SapB_1 | PF05184.10 | Saposin-like type B, region 1 |
| SapB_2 | PF03489.12 | Saposin-like type B, region 2 |
| SapC | PF07277.6 | SapC |
| SAPS | PF04499.10 | SIT4 phosphatase-associated protein |
| Sar8_2 | PF03058.9 | Sar8.2 family |
| SARA | PF11409.3 | Smad anchor for receptor activation (SARA) |
| Sarcoglycan_1 | PF04790.8 | Sarcoglycan complex subunit protein |
| Sarcoglycan_2 | PF05510.8 | Sarcoglycan alpha/epsilon |
| Sarcolipin | PF05366.6 | Sarcolipin |
| SARG | PF15385.1 | Specifically androgen-regulated gene protein |
| Sars6 | PF12133.3 | Open reading frame 6 from SARS coronavirus |
| SARS_3b | PF12383.3 | Severe acute respiratory syndrome coronavirus 3b protein |
| SARS_lipid_bind | PF09399.5 | SARS lipid binding protein |
| SARS_X4 | PF08779.5 | SARS coronavirus X4 like |
| SART-1 | PF03343.8 | SART-1 family |
| Sas10 | PF09368.5 | Sas10 C-terminal domain |
| Sas10_Utp3 | PF04000.10 | Sas10/Utp3/C1D family |
| SAS4 | PF15460.1 | Something about silencing, SAS, complex subunit 4 |
| SASP | PF00269.15 | Small, acid-soluble spore proteins, alpha/beta type |
| SASP_gamma | PF04259.9 | Small, acid-soluble spore protein, gamma-type |
| SASRP1 | PF15160.1 | Spermatogenesis-associated serine-rich protein 1 |
| SATase_N | PF06426.9 | Serine acetyltransferase, N-terminal |
| Saw1 | PF11561.3 | Single strand annealing-weakened 1 |
| SAYSvFN | PF10260.4 | Uncharacterized conserved domain (SAYSvFN) |
| SBBP | PF06739.6 | Beta-propeller repeat |
| SbcCD_C | PF13558.1 | Putative exonuclease SbcCD, C subunit |
| SbcD_C | PF12320.3 | Type 5 capsule protein repressor C-terminal domain |
| SBDS | PF01172.13 | Shwachman-Bodian-Diamond syndrome (SBDS) protein |
| SBDS_C | PF09377.5 | SBDS protein C-terminal domain |
| SBF | PF01758.11 | Sodium Bile acid symporter family |
| SBF2 | PF12335.3 | Myotubularin protein |
| Sbi-IV | PF11621.3 | C3 binding domain 4 of IgG-bind protein SBI |
| SbmA_BacA | PF05992.7 | SbmA/BacA-like family |
| SBP | PF03110.9 | SBP domain |
| SBP56 | PF05694.6 | 56kDa selenium binding protein (SBP56) |
| SBP_bac_1 | PF01547.20 | Bacterial extracellular solute-binding protein |
| SBP_bac_10 | PF07596.6 | Protein of unknown function (DUF1559) |
| SBP_bac_11 | PF13531.1 | Bacterial extracellular solute-binding protein |
| SBP_bac_3 | PF00497.15 | Bacterial extracellular solute-binding proteins, family 3 |
| SBP_bac_5 | PF00496.17 | Bacterial extracellular solute-binding proteins, family 5 Middle |
| SBP_bac_6 | PF13343.1 | Bacterial extracellular solute-binding protein |
| SBP_bac_7 | PF03480.8 | Bacterial extracellular solute-binding protein, family 7 |
| SBP_bac_8 | PF13416.1 | Bacterial extracellular solute-binding protein |
| SCA7 | PF08313.7 | SCA7, zinc-binding domain |
| Scaffolding_pro | PF11418.3 | Phi29 scaffolding protein |
| SCAMP | PF04144.8 | SCAMP family |
| SCAN | PF02023.12 | SCAN domain |
| ScdA_N | PF04405.9 | Domain of Unknown function (DUF542) |
| SCF | PF02404.10 | Stem cell factor |
| SCFA_trans | PF02667.9 | Short chain fatty acid transporter |
| SchA_CurD | PF04486.7 | SchA/CurD like domain |
| SCHIP-1 | PF10148.4 | Schwannomin-interacting protein 1 |
| SCIMP | PF15050.1 | SCIMP protein |
| Sclerostin | PF05463.6 | Sclerostin (SOST) |
| Scm3 | PF10384.4 | Centromere protein Scm3 |
| SCO1-SenC | PF02630.9 | SCO1/SenC |
| SCP-1 | PF05483.7 | Synaptonemal complex protein 1 (SCP-1) |
| SCP1201-deam | PF14428.1 | SCP1.201-like deaminase |
| SCP2 | PF02036.12 | SCP-2 sterol transfer family |
| SCP2_2 | PF13530.1 | Sterol carrier protein domain |
| ScpA_ScpB | PF02616.9 | ScpA/B protein |
| SCPU | PF05229.10 | Spore Coat Protein U domain |
| Scramblase | PF03803.10 | Scramblase |
| SCRG1 | PF15224.1 | Scrapie-responsive protein 1 |
| SCRL | PF06876.7 | Plant self-incompatibility response (SCRL) protein |
| Scs3p | PF10261.4 | Inositol phospholipid synthesis and fat-storage-inducing TM |
| Scytalone_dh | PF02982.9 | Scytalone dehydratase |
| Sda | PF08970.5 | Sporulation inhibitor A |
| SDA1 | PF05285.7 | SDA1 |
| SDF | PF00375.13 | Sodium:dicarboxylate symporter family |
| Sdh5 | PF03937.11 | Flavinator of succinate dehydrogenase |
| SDH_alpha | PF03313.10 | Serine dehydratase alpha chain |
| SDH_beta | PF03315.10 | Serine dehydratase beta chain |
| Sdh_cyt | PF01127.17 | Succinate dehydrogenase/Fumarate reductase transmembrane subunit |
| SDH_sah | PF01972.11 | Serine dehydrogenase proteinase |
| SdiA-regulated | PF06977.6 | SdiA-regulated |
| SdpI | PF13630.1 | SdpI/YhfL protein family |
| SDP_N | PF12278.3 | Sex determination protein N terminal |
| SdrG_C_C | PF10425.4 | C-terminus of bacterial fibrinogen-binding adhesin |
| Sds3 | PF08598.6 | Sds3-like |
| SE | PF08491.5 | Squalene epoxidase |
| Se-cys_synth_N | PF12390.3 | Selenocysteine synthase N terminal |
| SEA | PF01390.15 | SEA domain |
| Seadorna_Vp10 | PF07322.6 | Seadornavirus Vp10 |
| Seadorna_VP6 | PF07407.6 | Seadornavirus VP6 protein |
| Seadorna_VP7 | PF07387.6 | Seadornavirus VP7 |
| Sec-ASP3 | PF15432.1 | Accessory Sec secretory system ASP3 |
| SEC-C | PF02810.10 | SEC-C motif |
| Sec1 | PF00995.18 | Sec1 family |
| Sec10 | PF07393.6 | Exocyst complex component Sec10 |
| Sec15 | PF04091.7 | Exocyst complex subunit Sec15-like |
| Sec16 | PF12932.2 | Vesicle coat trafficking protein Sec16 mid-region |
| Sec16_C | PF12931.2 | Sec23-binding domain of Sec16 |
| Sec16_N | PF12935.2 | Vesicle coat trafficking protein Sec16 N-terminus |
| Sec20 | PF03908.8 | Sec20 |
| Sec23_BS | PF08033.7 | Sec23/Sec24 beta-sandwich domain |
| Sec23_helical | PF04815.10 | Sec23/Sec24 helical domain |
| Sec23_trunk | PF04811.10 | Sec23/Sec24 trunk domain |
| Sec2p | PF06428.6 | GDP/GTP exchange factor Sec2p |
| Sec3-PIP2_bind | PF15277.1 | Exocyst complex component SEC3 N-terminal PIP2 binding PH |
| Sec31 | PF11549.3 | Protein transport protein SEC31 |
| Sec34 | PF04136.10 | Sec34-like family |
| Sec39 | PF08314.6 | Secretory pathway protein Sec39 |
| Sec3_C | PF09763.4 | Exocyst complex component Sec3 |
| Sec3_C_2 | PF15278.1 | Sec3 exocyst complex subunit |
| Sec5 | PF15469.1 | Exocyst complex component Sec5 |
| Sec6 | PF06046.8 | Exocyst complex component Sec6 |
| Sec61_beta | PF03911.11 | Sec61beta family |
| Sec62 | PF03839.11 | Translocation protein Sec62 |
| Sec63 | PF02889.11 | Sec63 Brl domain |
| Sec66 | PF09802.4 | Preprotein translocase subunit Sec66 |
| Sec7 | PF01369.15 | Sec7 domain |
| Sec7_N | PF12783.2 | Guanine nucleotide exchange factor in Golgi transport N-terminal |
| Sec8_exocyst | PF04048.9 | Sec8 exocyst complex component specific domain |
| SecA_DEAD | PF07517.9 | SecA DEAD-like domain |
| SecA_PP_bind | PF01043.15 | SecA preprotein cross-linking domain |
| SecA_SW | PF07516.8 | SecA Wing and Scaffold domain |
| SecB | PF02556.9 | Preprotein translocase subunit SecB |
| SecD-TM1 | PF13721.1 | SecD export protein N-terminal TM region |
| SecD_SecF | PF02355.11 | Protein export membrane protein |
| SecE | PF00584.15 | SecE/Sec61-gamma subunits of protein translocation complex |
| SecG | PF03840.9 | Preprotein translocase SecG subunit |
| SecIII_SopE_N | PF05364.9 | Salmonella type III secretion SopE effector N-terminus |
| SecM | PF06558.7 | Secretion monitor precursor protein (SecM) |
| Secretin | PF00263.16 | Bacterial type II and III secretion system protein |
| Secretin_N | PF03958.12 | Bacterial type II/III secretion system short domain |
| Secretin_N_2 | PF07655.8 | Secretin N-terminal domain |
| Secretogranin_V | PF05281.6 | Neuroendocrine protein 7B2 precursor (Secretogranin V) |
| Securin | PF04856.8 | Securin sister-chromatid separation inhibitor |
| SecY | PF00344.15 | SecY translocase |
| Sec_GG | PF07549.9 | SecD/SecF GG Motif |
| Sed5p | PF11416.3 | Integral membrane protein Sed5p |
| Sedlin_N | PF04628.8 | Sedlin, N-terminal conserved region |
| SEEEED | PF14797.1 | Serine-rich region of AP3B1, clathrin-adaptor complex |
| SEEK1 | PF15357.1 | Psoriasis susceptibility 1 candidate 1 |
| SEF14_adhesin | PF06443.6 | SEF14-like adhesin |
| SEFIR | PF08357.6 | SEFIR domain |
| Seipin | PF06775.9 | Putative adipose-regulatory protein (Seipin) |
| Sel1 | PF08238.7 | Sel1 repeat |
| SelA | PF03841.8 | L-seryl-tRNA selenium transferase |
| SelB-wing_1 | PF09105.5 | Elongation factor SelB, winged helix |
| SelB-wing_2 | PF09106.6 | Elongation factor SelB, winged helix |
| SelB-wing_3 | PF09107.6 | Elongation factor SelB, winged helix |
| SeleniumBinding | PF11524.3 | Selenium binding protein |
| Selenoprotein_S | PF06936.6 | Selenoprotein S (SelS) |
| Self-incomp_S1 | PF05938.6 | Plant self-incompatibility protein S1 |
| SelP_C | PF04593.9 | Selenoprotein P, C terminal region |
| SelP_N | PF04592.9 | Selenoprotein P, N terminal region |
| SelR | PF01641.13 | SelR domain |
| Sema | PF01403.14 | Sema domain |
| Semenogelin | PF05474.6 | Semenogelin |
| Semialdhyde_dh | PF01118.19 | Semialdehyde dehydrogenase, NAD binding domain |
| Semialdhyde_dhC | PF02774.13 | Semialdehyde dehydrogenase, dimerisation domain |
| Sen15 | PF09631.5 | Sen15 protein |
| SEN1_N | PF12726.2 | SEN1 N terminal |
| Senescence | PF06911.7 | Senescence-associated protein |
| Senescence_reg | PF04520.8 | Senescence regulator |
| Sensor | PF13796.1 | Putative sensor |
| Sensor_TM1 | PF13755.1 | Sensor N-terminal transmembrane domain |
| SEO_C | PF14577.1 | Sieve element occlusion C-terminus |
| SEO_N | PF14576.1 | Sieve element occlusion N-terminus |
| SEP | PF08059.8 | SEP domain |
| Sep15_SelM | PF08806.6 | Sep15/SelM redox domain |
| SepQ | PF06622.6 | SepQ protein |
| Septin | PF00735.13 | Septin |
| Septum_form | PF13845.1 | Septum formation |
| SepZ | PF06066.6 | SepZ |
| SeqA | PF03925.8 | SeqA protein |
| Serendipity_A | PF05482.7 | Serendipity locus alpha protein (SRY-A) |
| Serglycin | PF04360.7 | Serglycin |
| SerH | PF06873.6 | Cell surface immobilisation antigen SerH |
| Serinc | PF03348.10 | Serine incorporator (Serinc) |
| Serine_rich | PF08824.5 | Serine rich protein interaction domain |
| Serpentine_r_xa | PF03383.10 | Caenorhabditis serpentine receptor-like protein, class xa |
| Serpin | PF00079.15 | Serpin (serine protease inhibitor) |
| Serpulina_VSP | PF05540.6 | Serpulina hyodysenteriae variable surface protein |
| SERTA | PF06031.8 | SERTA motif |
| Serum_albumin | PF00273.15 | Serum albumin family |
| Seryl_tRNA_N | PF02403.17 | Seryl-tRNA synthetase N-terminal domain |
| Ser_hydrolase | PF06821.8 | Serine hydrolase |
| SET | PF00856.23 | SET domain |
| SET_assoc | PF11767.3 | Histone lysine methyltransferase SET associated |
| Sex_peptide | PF08138.6 | Sex peptide (SP) family |
| SF-assemblin | PF06705.6 | SF-assemblin/beta giardin |
| SF3a60_bindingd | PF12108.3 | Splicing factor SF3a60 binding domain |
| SF3b1 | PF08920.5 | Splicing factor 3B subunit 1 |
| SF3b10 | PF07189.6 | Splicing factor 3B subunit 10 (SF3b10) |
| Sfi1 | PF08457.5 | Sfi1 spindle body protein |
| Sfi1_C | PF10638.4 | Spindle body associated protein C-terminus |
| SfsA | PF03749.8 | Sugar fermentation stimulation protein |
| SFTA2 | PF15210.1 | Surfactant-associated protein 2 |
| Sgf11 | PF08209.6 | Sgf11 (transcriptional regulation protein) |
| SGIII | PF15467.1 | Secretogranin-3 |
| SGL | PF08450.7 | SMP-30/Gluconolaconase/LRE-like region |
| SgrR_N | PF12793.2 | Sugar transport-related sRNA regulator N-term |
| SGS | PF05002.10 | SGS domain |
| SGT1 | PF07093.6 | SGT1 protein |
| SH | PF01445.12 | Viral small hydrophobic protein |
| SH2 | PF00017.19 | SH2 domain |
| SH2_2 | PF14633.1 | SH2 domain |
| SH3BGR | PF04908.10 | SH3-binding, glutamic acid-rich protein |
| SH3BP5 | PF05276.9 | SH3 domain-binding protein 5 (SH3BP5) |
| SH3_1 | PF00018.23 | SH3 domain |
| SH3_2 | PF07653.12 | Variant SH3 domain |
| SH3_3 | PF08239.6 | Bacterial SH3 domain |
| SH3_4 | PF06347.8 | Bacterial SH3 domain |
| SH3_5 | PF08460.5 | Bacterial SH3 domain |
| SH3_6 | PF12913.2 | SH3 domain of the SH3b1 type |
| SH3_7 | PF12914.2 | SH3 domain of SH3b2 type |
| SH3_8 | PF13457.1 | SH3-like domain |
| SH3_9 | PF14604.1 | Variant SH3 domain |
| Shadoo | PF14999.1 | Shadow of prion protein, neuroprotective |
| Shal-type | PF11601.3 | Shal-type voltage-gated potassium channels |
| SHD1 | PF03983.7 | SLA1 homology domain 1, SHD1 |
| She2p | PF11435.3 | RNA binding protein She2p |
| She9_MDM33 | PF05546.6 | She9 / Mdm33 family |
| Shigella_OspC | PF06128.6 | Shigella flexneri OspC protein |
| Shikimate_DH | PF01488.15 | Shikimate / quinate 5-dehydrogenase |
| Shikimate_dh_N | PF08501.6 | Shikimate dehydrogenase substrate binding domain |
| SHIPPO-rpt | PF07004.7 | Sperm-tail PG-rich repeat |
| Shisa | PF13908.1 | Wnt and FGF inhibitory regulator |
| ShK | PF01549.19 | ShK domain-like |
| ShlB | PF03865.8 | Haemolysin secretion/activation protein ShlB/FhaC/HecB |
| SHMT | PF00464.14 | Serine hydroxymethyltransferase |
| SHNi-TPR | PF10516.4 | SHNi-TPR |
| SHOCT | PF09851.4 | Short C-terminal domain |
| SHP | PF03579.8 | Small hydrophobic protein |
| SHQ1 | PF04925.10 | SHQ1 protein |
| SHR3_chaperone | PF08229.6 | ER membrane protein SH3 |
| SHS2_FTSA | PF02491.15 | SHS2 domain inserted in FTSA |
| SHS2_Rpb7-N | PF03876.12 | SHS2 domain found in N terminus of Rpb7p/Rpc25p/MJ0397 |
| Shufflon_N | PF04917.7 | Bacterial shufflon protein, N-terminal constant region |
| Shugoshin_C | PF07557.6 | Shugoshin C terminus |
| Shugoshin_N | PF07558.6 | Shugoshin N-terminal coiled-coil region |
| Siah-Interact_N | PF09032.6 | Siah interacting protein, N terminal |
| Sial-lect-inser | PF09264.5 | Vibrio cholerae sialidase, lectin insertion |
| Sialidase | PF02973.11 | Sialidase, N-terminal domain |
| Sialidase_penC | PF12135.3 | Sialidase enzyme penultimate C terminal domain |
| SIC | PF03482.8 | sic protein |
| SICA_alpha | PF12887.2 | SICA extracellular alpha domain |
| SICA_beta | PF12878.2 | SICA extracellular beta domain |
| SICA_C | PF12879.2 | SICA C-terminal inner membrane domain |
| SicP-binding | PF09119.5 | SicP binding |
| SID | PF11778.3 | Septation initiation |
| SID-1_RNA_chan | PF13965.1 | dsRNA-gated channel SID-1 |
| SidE | PF12252.3 | Dot/Icm substrate protein |
| SieB | PF14163.1 | Superinfection exclusion protein B |
| Sif | PF06767.6 | Sif protein |
| Sigma54_activat | PF00158.21 | Sigma-54 interaction domain |
| Sigma54_activ_2 | PF14532.1 | Sigma-54 interaction domain |
| Sigma54_AID | PF00309.15 | Sigma-54 factor, Activator interacting domain (AID) |
| Sigma54_CBD | PF04963.8 | Sigma-54 factor, core binding domain |
| Sigma54_DBD | PF04552.8 | Sigma-54, DNA binding domain |
| Sigma70_ECF | PF07638.6 | ECF sigma factor |
| Sigma70_ner | PF04546.8 | Sigma-70, non-essential region |
| Sigma70_r1_1 | PF03979.9 | Sigma-70 factor, region 1.1 |
| Sigma70_r1_2 | PF00140.15 | Sigma-70 factor, region 1.2 |
| Sigma70_r2 | PF04542.9 | Sigma-70 region 2 |
| Sigma70_r3 | PF04539.11 | Sigma-70 region 3 |
| Sigma70_r4 | PF04545.11 | Sigma-70, region 4 |
| Sigma70_r4_2 | PF08281.7 | Sigma-70, region 4 |
| Sigma_1s | PF02454.11 | Sigma 1s protein |
| Sigma_1_2 | PF03084.9 | Reoviral Sigma1/Sigma2 family |
| Sigma_reg_C | PF13791.1 | Sigma factor regulator C-terminal |
| Sigma_reg_N | PF13800.1 | Sigma factor regulator N-terminal |
| Silic_transp | PF03842.8 | Silicon transporter |
| SIMPL | PF04402.9 | Protein of unknown function (DUF541) |
| SIM_C | PF06621.7 | Single-minded protein C-terminus |
| SIN1 | PF05422.7 | Stress-activated map kinase interacting protein 1 (SIN1) |
| Sin3_corepress | PF08295.7 | Sin3 family co-repressor |
| Sina | PF03145.11 | Seven in absentia protein family |
| SinI | PF08671.5 | Anti-repressor SinI |
| Sin_N | PF04801.8 | Sin-like protein conserved region |
| SIP | PF04954.8 | Siderophore-interacting protein |
| SIP1 | PF04938.7 | Survival motor neuron (SMN) interacting protein 1 (SIP1) |
| SipA | PF09052.5 | Salmonella invasion protein A |
| Sipho_Gp157 | PF05565.6 | Siphovirus Gp157 |
| Sipho_Gp37 | PF14594.1 | Siphovirus ReqiPepy6 Gp37-like protein |
| Sipho_tail | PF05709.6 | Phage tail protein |
| Sir1 | PF11603.3 | Regulatory protein Sir1 |
| SIR2 | PF02146.12 | Sir2 family |
| SIR2_2 | PF13289.1 | SIR2-like domain |
| SirB | PF04247.7 | Invasion gene expression up-regulator, SirB |
| Sirohm_synth_C | PF14823.1 | Sirohaem biosynthesis protein C-terminal |
| Sirohm_synth_M | PF14824.1 | Sirohaem biosynthesis protein central |
| SIS | PF01380.17 | SIS domain |
| SIS_2 | PF13580.1 | SIS domain |
| SIT | PF15330.1 | SHP2-interacting transmembrane adaptor protein, SIT |
| Siva | PF05458.7 | Cd27 binding protein (Siva) |
| SKG6 | PF08693.5 | Transmembrane alpha-helix domain |
| SKI | PF01202.17 | Shikimate kinase |
| SKIP_SNW | PF02731.10 | SKIP/SNW domain |
| Ski_Sno | PF02437.12 | SKI/SNO/DAC family |
| SKN1 | PF03935.10 | Beta-glucan synthesis-associated protein (SKN1) |
| Skp1 | PF01466.14 | Skp1 family, dimerisation domain |
| Skp1_POZ | PF03931.10 | Skp1 family, tetramerisation domain |
| SK_channel | PF03530.9 | Calcium-activated SK potassium channel |
| SLAC1 | PF03595.12 | Voltage-dependent anion channel |
| SLAIN | PF15301.1 | SLAIN motif-containing family |
| SLAM | PF06214.6 | Signaling lymphocytic activation molecule (SLAM) protein |
| SLAP | PF03217.9 | Bacterial surface layer protein |
| SLA_LP_auto_ag | PF05889.8 | Soluble liver antigen/liver pancreas antigen (SLA/LP autoantigen) |
| SLBB | PF10531.4 | SLBB domain |
| SLBP_RNA_bind | PF15247.1 | Histone RNA hairpin-binding protein RNA-binding domain |
| SLD3 | PF08639.5 | DNA replication regulator SLD3 |
| Sld5 | PF05916.6 | GINS complex protein |
| SLEI_Leptospira | PF07620.6 | SLEI |
| SLH | PF00395.15 | S-layer homology domain |
| SLIDE | PF09111.5 | SLIDE |
| Slp | PF03843.8 | Outer membrane lipoprotein Slp family |
| SLR1-BP | PF07333.7 | S locus-related glycoprotein 1 binding pollen coat protein (SLR1-BP) |
| SLS | PF14611.1 | Mitochondrial inner-membrane-bound regulator |
| SLT | PF01464.15 | Transglycosylase SLT domain |
| SLT_2 | PF13406.1 | Transglycosylase SLT domain |
| SLT_beta | PF02258.11 | Shiga-like toxin beta subunit |
| SLT_L | PF14718.1 | Soluble lytic murein transglycosylase L domain |
| Slu7 | PF11708.3 | Pre-mRNA splicing Prp18-interacting factor |
| Slx4 | PF09494.5 | Slx4 endonuclease |
| SLX9 | PF15341.1 | Ribosome biogenesis protein SLX9 |
| SLY | PF12485.3 | Lymphocyte signaling adaptor protein |
| SlyX | PF04102.7 | SlyX |
| SM-ATX | PF14438.1 | Ataxin 2 SM domain |
| Smac_DIABLO | PF09057.5 | Second Mitochondria-derived Activator of Caspases |
| SMAP | PF15477.1 | Small acidic protein family |
| SMC_hinge | PF06470.8 | SMC proteins Flexible Hinge Domain |
| SMC_N | PF02463.14 | RecF/RecN/SMC N terminal domain |
| SMC_Nse1 | PF07574.8 | Nse1 non-SMC component of SMC5-6 complex |
| Smg4_UPF3 | PF03467.10 | Smg-4/UPF3 family |
| SMI1_KNR4 | PF09346.5 | SMI1 / KNR4 family (SUKH-1) |
| SMK-1 | PF04802.10 | Component of IIS longevity pathway SMK-1 |
| SMN | PF06003.7 | Survival motor neuron protein (SMN) |
| Smoothelin | PF12510.3 | Smoothelin cytoskeleton protein |
| SMP | PF04927.7 | Seed maturation protein |
| SmpA_OmlA | PF04355.8 | SmpA / OmlA family |
| SmpB | PF01668.13 | SmpB protein |
| SMP_2 | PF10144.4 | Bacterial virulence factor haemolysin |
| Smr | PF01713.16 | Smr domain |
| SMRP1 | PF15181.1 | Spermatid-specific manchette-related protein 1 |
| Sm_multidrug_ex | PF06695.6 | Putative small multi-drug export protein |
| SnAC | PF14619.1 | Snf2-ATP coupling, chromatin remodelling complex |
| SNAP | PF14938.1 | Soluble NSF attachment protein, SNAP |
| SNAP-25 | PF00835.14 | SNAP-25 family |
| SNAPc19 | PF15497.1 | snRNA-activating protein complex subunit 19, SNAPc subunit 19 |
| SnAPC_2_like | PF11035.3 | Small nuclear RNA activating complex subunit 2-like |
| SNAPc_SNAP43 | PF09808.4 | Small nuclear RNA activating complex (SNAPc), subunit SNAP43 |
| Snapin_Pallidin | PF14712.1 | Snapin/Pallidin |
| SNARE | PF05739.14 | SNARE domain |
| SNARE_assoc | PF09335.6 | SNARE associated Golgi protein |
| SNase | PF00565.12 | Staphylococcal nuclease homologue |
| SNF | PF00209.13 | Sodium:neurotransmitter symporter family |
| SNF2_assoc | PF08455.5 | Bacterial SNF2 helicase associated |
| SNF2_N | PF00176.18 | SNF2 family N-terminal domain |
| SNF5 | PF04855.7 | SNF5 / SMARCB1 / INI1 |
| Snf7 | PF03357.16 | Snf7 |
| SNN_cytoplasm | PF09051.5 | Stannin cytoplasmic |
| SNN_linker | PF09050.5 | Stannin unstructured linker |
| SNN_transmemb | PF09049.5 | Stannin transmembrane |
| SNO | PF01174.14 | SNO glutamine amidotransferase family |
| SnoaL | PF07366.7 | SnoaL-like polyketide cyclase |
| SnoaL_2 | PF12680.2 | SnoaL-like domain |
| SnoaL_3 | PF13474.1 | SnoaL-like domain |
| SnoaL_4 | PF13577.1 | SnoaL-like domain |
| SNURF | PF07192.6 | SNURF/RPN4 protein |
| Snurportin1 | PF11538.3 | Snurportin1 |
| SOBP | PF15279.1 | Sine oculis-binding protein |
| SOCS | PF12610.3 | Suppressor of cytokine signalling |
| SOCS_box | PF07525.11 | SOCS box |
| Sod_Cu | PF00080.15 | Copper/zinc superoxide dismutase (SODC) |
| Sod_Fe_C | PF02777.13 | Iron/manganese superoxide dismutases, C-terminal domain |
| Sod_Fe_N | PF00081.17 | Iron/manganese superoxide dismutases, alpha-hairpin domain |
| Sod_Ni | PF09055.6 | Nickel-containing superoxide dismutase |
| Sof1 | PF04158.9 | Sof1-like domain |
| SOG2 | PF10428.4 | RAM signalling pathway protein |
| Solute_trans_a | PF03619.11 | Organic solute transporter Ostalpha |
| Somatomedin_B | PF01033.12 | Somatomedin B domain |
| Somatostatin | PF03002.10 | Somatostatin/Cortistatin family |
| SopA | PF13981.1 | SopA-like central domain |
| SopA_C | PF13979.1 | SopA-like catalytic domain |
| SopD | PF11047.3 | Salmonella outer protein D |
| SopE_GEF | PF07487.8 | SopE GEF domain |
| SOR | PF07682.6 | Sulphur oxygenase reductase |
| Sorb | PF02208.11 | Sorbin homologous domain |
| Sororin | PF09666.5 | Sororin protein |
| Sortase | PF04203.8 | Sortase family |
| Sorting_nexin | PF03700.8 | Sorting nexin, N-terminal domain |
| SOR_SNZ | PF01680.12 | SOR/SNZ family |
| SOUL | PF04832.7 | SOUL heme-binding protein |
| SoxD | PF04267.7 | Sarcosine oxidase, delta subunit family |
| SoxE | PF06525.6 | Sulfocyanin (SoxE) |
| SoxG | PF04268.7 | Sarcosine oxidase, gamma subunit family |
| SOXp | PF12336.3 | SOX transcription factor |
| SoxY | PF13501.1 | Sulfur oxidation protein SoxY |
| SoxZ | PF08770.6 | Sulphur oxidation protein SoxZ |
| Sox_C_TAD | PF12067.3 | Sox C-terminal transactivation domain |
| Sox_N | PF12444.3 | Sox developmental protein N terminal |
| Soyouz_module | PF14313.1 | N-terminal region of Paramyxovirinae phosphoprotein (P) |
| Sp100 | PF03172.8 | Sp100 domain |
| SP2 | PF03014.9 | Structural protein 2 |
| Sp38 | PF07354.7 | Zona-pellucida-binding protein (Sp38) |
| SPA | PF08616.5 | Stabilization of polarity axis |
| SpaB_C | PF14028.1 | SpaB C-terminal domain |
| SPACA7 | PF15307.1 | Sperm acrosome-associated protein 7 |
| SPAM | PF02090.10 | Salmonella surface presentation of antigen gene type M protein |
| SPAN | PF02510.9 | Surface presentation of antigens protein |
| SPAN-X | PF07458.7 | Sperm protein associated with nucleus, mapped to X chromosome |
| SPARC_Ca_bdg | PF10591.4 | Secreted protein acidic and rich in cysteine Ca binding region |
| SPASM | PF13186.1 | Iron-sulfur cluster-binding domain |
| SPATA19 | PF15212.1 | Spermatogenesis-associated protein 19, mitochondrial |
| SPATA24 | PF15175.1 | Spermatogenesis-associated protein 24 |
| SPATA25 | PF15218.1 | Spermatogenesis-associated protein 25 |
| SPATA6 | PF14909.1 | Spermatogenesis-assoc protein 6 |
| Spatacsin_C | PF14649.1 | Spatacsin C-terminus |
| SPATIAL | PF15256.1 | SPATIAL |
| Spb1_C | PF07780.7 | Spb1 C-terminal domain |
| SPC12 | PF06645.8 | Microsomal signal peptidase 12 kDa subunit (SPC12) |
| SPC22 | PF04573.7 | Signal peptidase subunit |
| Spc24 | PF08286.6 | Spc24 subunit of Ndc80 |
| SPC25 | PF06703.6 | Microsomal signal peptidase 25 kDa subunit (SPC25) |
| Spc42p | PF11544.3 | Spindle pole body component Spc42p |
| Spc7 | PF08317.6 | Spc7 kinetochore protein |
| Spc7_C2 | PF15577.1 | Spc7_C2 |
| Spc7_N | PF15402.1 | N-terminus of kinetochore NMS complex subunit Spc7 |
| Spc97_Spc98 | PF04130.8 | Spc97 / Spc98 family |
| SpdB | PF05122.8 | Mobile element transfer protein |
| SPDY | PF03771.11 | Domain of unknown function (DUF317) |
| SpecificRecomb | PF10136.4 | Site-specific recombinase |
| Spectrin | PF00435.16 | Spectrin repeat |
| Speriolin_C | PF15059.1 | Speriolin C-terminus |
| Speriolin_N | PF15058.1 | Speriolin N terminus |
| Spermine_synth | PF01564.12 | Spermine/spermidine synthase |
| Sperm_act_pep | PF08250.6 | Sperm-activating peptides |
| Sperm_Ag_HE2 | PF05324.8 | Sperm antigen HE2 |
| Spexin | PF15171.1 | Neuropeptide secretory protein family, NPQ, spexin |
| SPG48 | PF14764.1 | AP-5 complex subunit, vesicle trafficking |
| Spheroidin | PF05541.7 | Entomopoxvirus spheroidin protein |
| Spherulin4 | PF12138.3 | Spherulation-specific family 4 |
| Spidroin_MaSp | PF11260.3 | Major ampullate spidroin 1 and 2 |
| Spike_rec_bind | PF09408.5 | Spike receptor binding domain |
| Spin-Ssty | PF02513.12 | Spin/Ssty Family |
| Spindle_Spc25 | PF08234.7 | Chromosome segregation protein Spc25 |
| Spiralin | PF05215.8 | Spiralin |
| SPK | PF04435.13 | Domain of unknown function (DUF545) |
| SplA | PF11132.3 | Transcriptional regulator protein (SplA) |
| Spo0A_C | PF08769.6 | Sporulation initiation factor Spo0A C terminal |
| Spo0M | PF07070.6 | SpoOM protein |
| SPO11_like | PF03533.9 | SPO11 homologue |
| Spo12 | PF05032.7 | Spo12 family |
| SPO22 | PF08631.5 | Meiosis protein SPO22/ZIP4 like |
| Spo7 | PF03907.8 | Spo7-like protein |
| Spo7_2_N | PF15407.1 | Sporulation protein family 7 |
| SpoA | PF01052.15 | Surface presentation of antigens (SPOA) |
| SPOB_a | PF14689.1 | Sensor_kinase_SpoOB-type, alpha-helical domain |
| SPOB_ab | PF14682.1 | Sporulation initiation phospho-transferase B, C-terminal |
| SPOC | PF07744.8 | SPOC domain |
| SpoIIAA-like | PF11964.3 | SpoIIAA-like |
| SpoIID | PF08486.5 | Stage II sporulation protein |
| SpoIIE | PF07228.7 | Stage II sporulation protein E (SpoIIE) |
| SpoIIIAC | PF06686.6 | Stage III sporulation protein AC/AD protein family |
| SpoIIIAH | PF12685.2 | SpoIIIAH-like protein |
| SpoIIID | PF12116.3 | Stage III sporulation protein D |
| SpoIIP | PF07454.6 | Stage II sporulation protein P (SpoIIP) |
| SpoIISA_toxin | PF14171.1 | Toxin SpoIISA, type II toxin-antitoxin system |
| SpoIISB_antitox | PF14185.1 | Antitoxin SpoIISB, type II toxin-antitoxin system |
| Spond_N | PF06468.8 | Spondin_N |
| SpoOE-like | PF09388.5 | Spo0E like sporulation regulatory protein |
| SPOR | PF05036.8 | Sporulation related domain |
| Spore-coat_CotD | PF11122.3 | Inner spore coat protein D |
| Spore-coat_CotZ | PF10612.4 | Spore coat protein Z |
| Spore_coat_CotO | PF14153.1 | Spore coat protein CotO |
| Spore_GerAC | PF05504.6 | Spore germination B3/ GerAC like, C-terminal |
| Spore_GerQ | PF09671.5 | Spore coat protein (Spore_GerQ) |
| Spore_III_AB | PF09548.5 | Stage III sporulation protein AB (spore_III_AB) |
| Spore_III_AE | PF09546.5 | Stage III sporulation protein AE (spore_III_AE) |
| Spore_III_AF | PF09581.5 | Stage III sporulation protein AF (Spore_III_AF) |
| Spore_II_R | PF09551.5 | Stage II sporulation protein R (spore_II_R) |
| Spore_IV_A | PF09547.5 | Stage IV sporulation protein A (spore_IV_A) |
| Spore_permease | PF03845.8 | Spore germination protein |
| Spore_SspJ | PF09575.5 | Small spore protein J (Spore_SspJ) |
| Spore_YabQ | PF09578.5 | Spore cortex protein YabQ (Spore_YabQ) |
| Spore_YhaL | PF14147.1 | Sporulation protein YhaL |
| Spore_YhcN_YlaJ | PF09580.5 | Sporulation lipoprotein YhcN/YlaJ (Spore_YhcN_YlaJ) |
| Spore_YpjB | PF09577.5 | Sporulation protein YpjB (SpoYpjB) |
| Spore_YtfJ | PF09579.5 | Sporulation protein YtfJ (Spore_YtfJ) |
| Spore_YtrH | PF14034.1 | Sporulation protein YtrH |
| Spore_YunB | PF09560.5 | Sporulation protein YunB (Spo_YunB) |
| Sporozoite_P67 | PF05642.6 | Sporozoite P67 surface antigen |
| SporV_AA | PF12164.3 | Stage V sporulation protein AA |
| Spot_14 | PF07084.7 | Thyroid hormone-inducible hepatic protein Spot 14 |
| SPOUT_MTase | PF02590.12 | Predicted SPOUT methyltransferase |
| SPOUT_MTase_2 | PF14419.1 | AF2226-like SPOUT RNA Methylase fused to THUMP |
| SpoU_methylase | PF00588.14 | SpoU rRNA Methylase family |
| SpoU_methylas_C | PF12105.3 | SpoU, rRNA methylase, C-terminal |
| SpoU_sub_bind | PF08032.7 | RNA 2'-O ribose methyltransferase substrate binding |
| SpoV | PF08183.6 | Stage V sporulation protein family |
| SpoVA | PF03862.8 | SpoVA protein |
| SpoVAB | PF13782.1 | Stage V sporulation protein AB |
| SpoVAD | PF07451.6 | Stage V sporulation protein AD (SpoVAD) |
| SpoVAE | PF14097.1 | Stage V sporulation protein AE1 |
| SpoVG | PF04026.7 | SpoVG |
| SpoVIF | PF14069.1 | Stage VI sporulation protein F |
| SpoVR | PF04293.8 | SpoVR like protein |
| SpoVS | PF04232.7 | Stage V sporulation protein S (SpoVS) |
| Spp-24 | PF07448.6 | Secreted phosphoprotein 24 (Spp-24) |
| SPR1 | PF15356.1 | Psoriasis susceptibility locus 2 |
| SprA-related | PF12118.3 | SprA-related family |
| SprA_N | PF14349.1 | Motility related/secretion protein |
| SprB | PF13573.1 | SprB repeat |
| Sprouty | PF05210.8 | Sprouty protein (Spry) |
| SPRR2 | PF14820.1 | Small proline-rich 2 |
| SprT-like | PF10263.4 | SprT-like family |
| SPRY | PF00622.23 | SPRY domain |
| SPT16 | PF08644.6 | FACT complex subunit (SPT16/CDC68) |
| SPT2 | PF08243.6 | SPT2 chromatin protein |
| Spt20 | PF12090.3 | Spt20 family |
| Spt4 | PF06093.8 | Spt4/RpoE2 zinc finger |
| Spt5-NGN | PF03439.8 | Early transcription elongation factor of RNA pol II, NGN section |
| Spt5_N | PF11942.3 | Spt5 transcription elongation factor, acidic N-terminal |
| SPT6_acidic | PF14632.1 | Acidic N-terminal SPT6 |
| Spuma_A9PTase | PF03539.9 | Spumavirus aspartic protease (A9) |
| SpvB | PF03534.8 | Salmonella virulence plasmid 65kDa B protein |
| SpvD | PF05563.7 | Salmonella plasmid virulence protein SpvD |
| SPW | PF03779.9 | SPW repeat |
| SPX | PF03105.14 | SPX domain |
| Spy1 | PF11357.3 | Cell cycle regulatory protein |
| SP_C-Propep | PF08999.5 | Surfactant protein C, N terminal propeptide |
| SQS_PSY | PF00494.14 | Squalene/phytoene synthase |
| Squash | PF00299.13 | Squash family serine protease inhibitor |
| SR-25 | PF10500.4 | Nuclear RNA-splicing-associated protein |
| SRA1 | PF07304.6 | Steroid receptor RNA activator (SRA1) |
| SRC-1 | PF08832.5 | Steroid receptor coactivator |
| SRCR | PF00530.13 | Scavenger receptor cysteine-rich domain |
| SRCR_2 | PF15494.1 | Scavenger receptor cysteine-rich domain |
| Sre | PF03125.13 | C. elegans Sre G protein-coupled chemoreceptor |
| SRF-TF | PF00319.13 | SRF-type transcription factor (DNA-binding and dimerisation domain) |
| SrfB | PF07520.6 | Virulence factor SrfB |
| Srg | PF02118.16 | Srg family chemoreceptor |
| SRI | PF08236.6 | SRI (Set2 Rpb1 interacting) domain |
| SRP-alpha_N | PF04086.8 | Signal recognition particle, alpha subunit, N-terminal |
| SRP14 | PF02290.10 | Signal recognition particle 14kD protein |
| SRP19 | PF01922.12 | SRP19 protein |
| SRP1_TIP1 | PF00660.12 | Seripauperin and TIP1 family |
| SRP40_C | PF05022.7 | SRP40, C-terminal domain |
| SRP54 | PF00448.17 | SRP54-type protein, GTPase domain |
| SRP54_N | PF02881.14 | SRP54-type protein, helical bundle domain |
| SRP72 | PF08492.7 | SRP72 RNA-binding domain |
| SRP9-21 | PF05486.7 | Signal recognition particle 9 kDa protein (SRP9) |
| SRPRB | PF09439.5 | Signal recognition particle receptor beta subunit |
| SRP_SPB | PF02978.14 | Signal peptide binding domain |
| SRR | PF07709.6 | Seven Residue Repeat |
| SRR1 | PF07985.7 | SRR1 |
| SRRM_C | PF15230.1 | Serine/arginine repetitive matrix protein C-terminus |
| SRX | PF09201.5 | SRX |
| SSB | PF00436.20 | Single-strand binding protein family |
| SSDP | PF04503.8 | Single-stranded DNA binding protein, SSDP |
| SseB | PF07179.7 | SseB protein N-terminal domain |
| SseB_C | PF14581.1 | SseB protein C-terminal domain |
| SseC | PF04888.7 | Secretion system effector C (SseC) like family |
| SSF | PF00474.12 | Sodium:solute symporter family |
| SSFA2_C | PF14723.1 | Sperm-specific antigen 2 C-terminus |
| SsgA | PF04686.7 | Streptomyces sporulation and cell division protein, SsgA |
| SSI | PF00720.12 | Subtilisin inhibitor-like |
| Ssl1 | PF04056.9 | Ssl1-like |
| SSP160 | PF06933.6 | Special lobe-specific silk protein SSP160 |
| SspB | PF04386.8 | Stringent starvation protein B |
| SspH | PF08141.7 | Small acid-soluble spore protein H family |
| SSPI | PF14098.1 | Small, acid-soluble spore protein I |
| SspK | PF08176.7 | Small acid-soluble spore protein K family |
| SspN | PF08177.6 | Small acid-soluble spore protein N family |
| SspO | PF08175.7 | Small acid-soluble spore protein O family |
| SspP | PF08179.7 | Small acid-soluble spore protein P family |
| SSrecog | PF03531.9 | Structure-specific recognition protein (SSRP1) |
| Ssu72 | PF04722.8 | Ssu72-like protein |
| SSURE | PF11966.3 | Fibronectin-binding repeat |
| SSV1_ORF_D-335 | PF07935.6 | ORF D-335-like protein |
| SSXRD | PF09514.5 | SSXRD motif |
| SSXT | PF05030.7 | SSXT protein (N-terminal region) |
| ST7 | PF04184.7 | ST7 protein |
| STAG | PF08514.6 | STAG domain |
| Stanniocalcin | PF03298.8 | Stanniocalcin family |
| Staphopain_pro | PF14731.1 | Staphopain proregion |
| Staphostatin_A | PF09022.5 | Staphostatin A |
| Staphostatin_B | PF09023.5 | Staphostatin B |
| Staphylcoagulse | PF04022.7 | Staphylocoagulase repeat |
| Staphylokinase | PF02821.11 | Staphylokinase/Streptokinase family |
| Staph_haemo | PF05480.6 | Staphylococcus haemolytic protein |
| Stap_Strp_toxin | PF01123.15 | Staphylococcal/Streptococcal toxin, OB-fold domain |
| Stap_Strp_tox_C | PF02876.12 | Staphylococcal/Streptococcal toxin, beta-grasp domain |
| START | PF01852.14 | START domain |
| STAS | PF01740.16 | STAS domain |
| STAS_2 | PF13466.1 | STAS domain |
| STAT1_TAZ2bind | PF12162.3 | STAT1 TAZ2 binding domain |
| STAT2_C | PF12188.3 | Signal transducer and activator of transcription 2 C terminal |
| STAT6_C | PF14596.1 | STAT6 C-terminal |
| Statherin | PF03875.8 | Statherin |
| Stathmin | PF00836.14 | Stathmin family |
| STAT_alpha | PF01017.15 | STAT protein, all-alpha domain |
| STAT_bind | PF02864.10 | STAT protein, DNA binding domain |
| STAT_int | PF02865.12 | STAT protein, protein interaction domain |
| Staygreen | PF12638.2 | Staygreen protein |
| Stb3 | PF10330.4 | Putative Sin3 binding protein |
| StbA | PF06406.6 | StbA protein |
| STb_secrete | PF09075.5 | Heat-stable enterotoxin B, secretory |
| Stc1 | PF12898.2 | Stc1 domain |
| STE | PF02200.11 | STE like transcription factor |
| STE2 | PF02116.10 | Fungal pheromone mating factor STE2 GPCR |
| STE3 | PF02076.10 | Pheromone A receptor |
| Ste5 | PF11610.3 | Scaffold protein Ste5-Fus5 binding region |
| Ste50p-SAM | PF09235.5 | Ste50p, sterile alpha motif |
| Ste5_C | PF12194.3 | Protein kinase Fus3-binding |
| Sterile | PF03015.14 | Male sterility protein |
| Steroid_dh | PF02544.11 | 3-oxo-5-alpha-steroid 4-dehydrogenase |
| Sterol-sensing | PF12349.3 | Sterol-sensing domain of SREBP cleavage-activation |
| Sterol_MT_C | PF08498.5 | Sterol methyltransferase C-terminal |
| Stig1 | PF04885.8 | Stigma-specific protein, Stig1 |
| STIL_N | PF15253.1 | SCL-interrupting locus protein N-terminus |
| Stimulus_sens_1 | PF13756.1 | Stimulus-sensing domain |
| Stirrup | PF09061.1 | Stirrup |
| Stk19 | PF10494.4 | Serine-threonine protein kinase 19 |
| Stm1_N | PF09598.5 | Stm1 |
| STN | PF07660.9 | Secretin and TonB N terminus short domain |
| Stn1 | PF10451.4 | Telomere regulation protein Stn1 |
| STN1_2 | PF09170.5 | CST, Suppressor of cdc thirteen homolog, complex subunit STN1 |
| Stn1_C | PF12659.2 | Telomere capping C-terminal wHTH |
| Stomoxyn | PF11585.3 | Insect antimicrobial peptide, stomoxyn |
| Stonin2_N | PF12016.3 | Stonin 2 |
| STOP | PF05217.7 | STOP protein |
| Stork_head | PF10264.4 | Winged helix Storkhead-box1 domain |
| Strabismus | PF06638.6 | Strabismus protein |
| Streptin-Immun | PF11083.3 | Lantibiotic streptin immunity protein |
| Strep_67kDa_ant | PF06100.6 | Streptococcal 67 kDa myosin-cross-reactive antigen like family |
| Strep_his_triad | PF04270.8 | Streptococcal histidine triad protein |
| Strep_pep | PF14404.1 | Ribosomally synthesized peptide in Streptomyces species |
| Strep_SA_rep | PF06696.6 | Streptococcal surface antigen repeat |
| Stress-antifung | PF01657.12 | Salt stress response/antifungal |
| Striatin | PF08232.7 | Striatin family |
| Strumpellin | PF10266.4 | Hereditary spastic paraplegia protein strumpellin |
| Str_synth | PF03088.11 | Strictosidine synthase |
| STT3 | PF02516.9 | Oligosaccharyl transferase STT3 subunit |
| SUA5 | PF03481.8 | Putative GTP-binding controlling metal-binding |
| Sua5_yciO_yrdC | PF01300.13 | Telomere recombination |
| Subtilosin_A | PF11420.3 | Bacteriocin subtilosin A |
| Succ_CoA_lig | PF13607.1 | Succinyl-CoA ligase like flavodoxin domain |
| Succ_DH_flav_C | PF02910.15 | Fumarate reductase flavoprotein C-term |
| Sucrose_synth | PF00862.14 | Sucrose synthase |
| Suc_Fer-like | PF06999.7 | Sucrase/ferredoxin-like |
| SUD-M | PF11633.3 | Single-stranded poly(A) binding domain |
| Suf | PF05843.9 | Suppressor of forked protein (Suf) |
| SufE | PF02657.10 | Fe-S metabolism associated domain |
| SUFU | PF05076.8 | Suppressor of fused protein (SUFU) |
| SUFU_C | PF12470.3 | Suppressor of Fused Gli/Ci N terminal binding domain |
| Sugar-bind | PF04198.8 | Putative sugar-binding domain |
| Sugarporin_N | PF11471.3 | Maltoporin periplasmic N-terminal extension |
| Sugar_tr | PF00083.19 | Sugar (and other) transporter |
| Sugar_transport | PF06800.7 | Sugar transport protein |
| SUI1 | PF01253.17 | Translation initiation factor SUI1 |
| SUKH-3 | PF14433.1 | SUKH-3 immunity protein |
| SUKH-4 | PF14435.1 | SUKH-4 immunity protein |
| SUKH_5 | PF14567.1 | SMI1-KNR4 cell-wall |
| SUKH_6 | PF14568.1 | SMI1-KNR4 cell-wall |
| SulA | PF03846.9 | Cell division inhibitor SulA |
| Sulfakinin | PF08257.6 | Sulfakinin family |
| Sulfatase | PF00884.18 | Sulfatase |
| Sulfatase_C | PF14707.1 | C-terminal region of aryl-sulfatase |
| Sulfate_transp | PF00916.15 | Sulfate transporter family |
| Sulfate_tra_GLY | PF13792.1 | Sulfate transporter N-terminal domain with GLY motif |
| Sulfolobus_pRN | PF05584.6 | Sulfolobus plasmid regulatory protein |
| Sulfotransfer_1 | PF00685.22 | Sulfotransferase domain |
| Sulfotransfer_2 | PF03567.9 | Sulfotransferase family |
| Sulfotransfer_3 | PF13469.1 | Sulfotransferase family |
| Sulf_coat_C | PF12193.3 | Sulfolobus virus coat protein C terminal |
| Sulf_transp | PF04143.9 | Sulphur transport |
| Sulphotransf | PF09037.5 | Stf0 sulphotransferase |
| SUN | PF03856.8 | Beta-glucosidase (SUN family) |
| Suppressor_APC | PF11414.3 | Adenomatous polyposis coli tumour suppressor protein |
| Suppressor_P21 | PF11479.3 | RNA silencing suppressor P21 |
| SUR7 | PF06687.7 | SUR7/PalI family |
| SurA_N | PF09312.6 | SurA N-terminal domain |
| SurA_N_2 | PF13623.1 | SurA N-terminal domain |
| SurA_N_3 | PF13624.1 | SurA N-terminal domain |
| SurE | PF01975.12 | Survival protein SurE |
| SURF1 | PF02104.10 | SURF1 family |
| SURF2 | PF05477.6 | Surfeit locus protein 2 (SURF2) |
| SURF4 | PF02077.10 | SURF4 family |
| SURF6 | PF04935.7 | Surfeit locus protein 6 |
| Surface_Ag_2 | PF01617.12 | Surface antigen |
| Surface_antigen | PF11054.3 | Sporozoite TA4 surface antigen |
| Surfac_D-trimer | PF09006.6 | Lung surfactant protein D coiled-coil trimerisation |
| Surf_Ag_VNR | PF07244.10 | Surface antigen variable number repeat |
| SURNod19 | PF07712.7 | Stress up-regulated Nod 19 |
| Surp | PF01805.15 | Surp module |
| SusD | PF07980.6 | SusD family |
| SusD-like | PF12741.2 | Susd and RagB outer membrane lipoprotein |
| SusD-like_2 | PF12771.2 | Starch-binding associating with outer membrane |
| SusD-like_3 | PF14322.1 | Starch-binding associating with outer membrane |
| SusE | PF14292.1 | SusE outer membrane protein |
| Sushi | PF00084.15 | Sushi domain (SCR repeat) |
| Sushi_2 | PF09014.5 | Beta-2-glycoprotein-1 fifth domain |
| SUV3_C | PF12513.3 | Mitochondrial degradasome RNA helicase subunit C terminal |
| SUZ | PF12752.2 | SUZ domain |
| SUZ-C | PF12901.2 | SUZ-C motif |
| SVA | PF05326.6 | Seminal vesicle autoantigen (SVA) |
| Svf1 | PF08622.5 | Svf1-like |
| SVM_signal | PF12113.3 | SVM protein signal sequence |
| SVS_QK | PF10578.4 | Seminal vesicle protein repeat |
| SVWC | PF15430.1 | Single domain von Willebrand factor type C |
| SWI-SNF_Ssr4 | PF08549.5 | Fungal domain of unknown function (DUF1750) |
| Swi3 | PF07962.7 | Replication Fork Protection Component Swi3 |
| Swi5 | PF07061.6 | Swi5 |
| SWIB | PF02201.13 | SWIB/MDM2 domain |
| SWIM | PF04434.12 | SWIM zinc finger |
| SWIRM | PF04433.12 | SWIRM domain |
| SWM_repeat | PF13753.1 | Putative flagellar system-associated repeat |
| Sybindin | PF04099.7 | Sybindin-like family |
| SYCE1 | PF15233.1 | Synaptonemal complex central element protein 1 |
| Syd | PF07348.7 | Syd protein (SUKH-2) |
| SYF2 | PF08231.7 | SYF2 splicing factor |
| Syja_N | PF02383.13 | SacI homology domain |
| SymE_toxin | PF08845.5 | Toxin SymE, type I toxin-antitoxin system |
| Symplekin_C | PF12295.3 | Symplekin tight junction protein C terminal |
| Synaphin | PF05835.7 | Synaphin protein |
| Synapsin | PF02078.11 | Synapsin, N-terminal domain |
| Synapsin_C | PF02750.9 | Synapsin, ATP binding domain |
| Synapsin_N | PF10581.4 | Synapsin N-terminal |
| Synaptobrevin | PF00957.16 | Synaptobrevin |
| Synaptonemal_3 | PF15191.1 | Synaptonemal complex central element protein 3 |
| Syncollin | PF15138.1 | Syncollin |
| Syndecan | PF01034.15 | Syndecan domain |
| SynMuv_product | PF06047.6 | Ras-induced vulval development antagonist |
| Syntaphilin | PF15290.1 | Golgi-localised syntaxin-1-binding clamp |
| Syntaxin | PF00804.20 | Syntaxin |
| Syntaxin-18_N | PF10496.4 | SNARE-complex protein Syntaxin-18 N-terminus |
| Syntaxin-6_N | PF09177.6 | Syntaxin 6, N-terminal |
| Syntaxin_2 | PF14523.1 | Syntaxin-like protein |
| Synthase_beta | PF11421.3 | ATP synthase F1 beta subunit |
| Synuclein | PF01387.12 | Synuclein |
| SyrA | PF11089.3 | Exopolysaccharide production repressor |
| SYS1 | PF09801.4 | Integral membrane protein S linking to the trans Golgi network |
| S_100 | PF01023.14 | S-100/ICaBP type calcium binding domain |
| S_layer_C | PF05124.7 | S-layer like family, C-terminal region |
| S_layer_N | PF05123.7 | S-layer like family, N-terminal region |
| S_locus_glycop | PF00954.15 | S-locus glycoprotein family |
| S_tail_recep_bd | PF14928.1 | Short tail fibre protein receptor-binding domain |
| s48_45 | PF07422.8 | Sexual stage antigen s48/45 domain |
| ssDNA-exonuc_C | PF10141.4 | Single-strand DNA-specific exonuclease, C terminal domain |
| stn_TNFRSF12A | PF12191.3 | Tumour necrosis factor receptor stn_TNFRSF12A_TNFR domain |