UniProtKB - O94979 (SC31A_HUMAN)
Protein transport protein Sec31A
SEC31A
Functioni
GO - Molecular functioni
- calcium-dependent protein binding Source: UniProtKB
- structural molecule activity Source: GO_Central
GO - Biological processi
- antigen processing and presentation of exogenous peptide antigen via MHC class II Source: Reactome
- antigen processing and presentation of peptide antigen via MHC class I Source: Reactome
- COPII-coated vesicle budding Source: GO_Central
- COPII-coated vesicle cargo loading Source: UniProtKB
- COPII vesicle coating Source: Reactome
- endoplasmic reticulum organization Source: GO_Central
- endoplasmic reticulum to Golgi vesicle-mediated transport Source: GO_Central
- intracellular protein transport Source: GO_Central
- IRE1-mediated unfolded protein response Source: Reactome
- response to calcium ion Source: UniProtKB
Keywordsi
Biological process | ER-Golgi transport, Protein transport, Transport |
Enzyme and pathway databases
Reactomei | R-HSA-204005 COPII-mediated vesicle transport R-HSA-2132295 MHC class II antigen presentation R-HSA-381038 XBP1(S) activates chaperone genes R-HSA-983170 Antigen Presentation: Folding, assembly and peptide loading of class I MHC |
SignaLinki | O94979 |
Protein family/group databases
TCDBi | 3.A.5.9.1 the general secretory pathway (sec) family |
Names & Taxonomyi
Protein namesi | Recommended name: Protein transport protein Sec31AAlternative name(s): ABP125 ABP130 SEC31-like protein 1 SEC31-related protein A Web1-like protein |
Gene namesi | Name:SEC31A Synonyms:KIAA0905, SEC31L1 ORF Names:HSPC275, HSPC334 |
Organismi | Homo sapiens (Human) |
Taxonomic identifieri | 9606 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo |
Proteomesi |
|
Organism-specific databases
HGNCi | HGNC:17052 SEC31A |
MIMi | 610257 gene |
neXtProti | NX_O94979 |
Subcellular locationi
Endoplasmic reticulum
- Endoplasmic reticulum membrane By similarity; Peripheral membrane protein By similarity
Cytosol
- cytosol 1 Publication
Other locations
- Cytoplasm By similarity
- COPII-coated vesicle membrane 4 Publications; Peripheral membrane protein ; Cytoplasmic side
Note: Associates with membranes in a GTP-dependent manner (By similarity). Localizes to endoplasmic reticulum exit sites (ERES), also known as transitional endoplasmic reticulum (tER) (PubMed:25201882, PubMed:28442536, PubMed:17428803).By similarity3 Publications
Cytosol
- cytosol Source: HPA
Endoplasmic reticulum
- endoplasmic reticulum Source: UniProtKB
- endoplasmic reticulum exit site Source: UniProtKB
- endoplasmic reticulum membrane Source: Reactome
Golgi apparatus
- Golgi membrane Source: GOC
Other locations
- COPII vesicle coat Source: UniProtKB
- COPII-coated ER to Golgi transport vesicle Source: UniProtKB
- cytoplasm Source: UniProtKB
- ER to Golgi transport vesicle membrane Source: Reactome
- intracellular membrane-bounded organelle Source: HPA
- perinuclear region of cytoplasm Source: UniProtKB
- vesicle coat Source: MGI
Keywords - Cellular componenti
Cytoplasm, Cytoplasmic vesicle, Endoplasmic reticulum, MembranePathology & Biotechi
Involvement in diseasei
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 647 | K → R: Does not abolish monoubiquitination by the BCR(KLHL12) E3 ubiquitin ligase complex, revealing flexibility of ubiquitination sites; when associated with R-1217. 1 Publication | 1 | |
Mutagenesisi | 1217 | K → R: Does not abolish monoubiquitination by the BCR(KLHL12) E3 ubiquitin ligase complex, revealing flexibility of ubiquitination sites; when associated with R-647. 1 Publication | 1 |
Keywords - Diseasei
Proto-oncogeneOrganism-specific databases
DisGeNETi | 22872 |
OpenTargetsi | ENSG00000138674 |
PharmGKBi | PA162402737 |
Miscellaneous databases
Pharosi | O94979 |
Polymorphism and mutation databases
BioMutai | SEC31A |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000295147 | 1 – 1220 | Protein transport protein Sec31AAdd BLAST | 1220 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 527 | PhosphoserineCombined sources | 1 | |
Modified residuei | 532 | PhosphoserineCombined sources | 1 | |
Cross-linki | 647 | Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)1 Publication | ||
Modified residuei | 799 | PhosphoserineCombined sources | 1 | |
Modified residuei | 1161 | PhosphothreonineCombined sources | 1 | |
Modified residuei | 1163 | PhosphoserineCombined sources | 1 | |
Cross-linki | 1217 | Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)1 Publication |
Post-translational modificationi
Keywords - PTMi
Isopeptide bond, Phosphoprotein, Ubl conjugationProteomic databases
EPDi | O94979 |
jPOSTi | O94979 |
MassIVEi | O94979 |
MaxQBi | O94979 |
PaxDbi | O94979 |
PeptideAtlasi | O94979 |
PRIDEi | O94979 |
ProteomicsDBi | 45124 50595 [O94979-1] 50596 [O94979-2] 50597 [O94979-3] 50598 [O94979-4] 50599 [O94979-5] 50600 [O94979-6] 50601 [O94979-7] 50602 [O94979-8] 7204 |
PTM databases
iPTMneti | O94979 |
PhosphoSitePlusi | O94979 |
SwissPalmi | O94979 |
Expressioni
Tissue specificityi
Gene expression databases
Bgeei | ENSG00000138674 Expressed in 236 organ(s), highest expression level in pituitary gland |
ExpressionAtlasi | O94979 baseline and differential |
Genevisiblei | O94979 HS |
Organism-specific databases
HPAi | HPA005457 |
Interactioni
Subunit structurei
COPII is composed of at least 5 proteins: the SEC23/24 complex, the SEC13/31 complex and SAR1. SEC13 and SEC31 make a 2:2 tetramer that forms the edge element of the COPII outer coat. The tetramer self-assembles in multiple copies to form the complete polyhedral cage.
Interacts (via WD 8) with SEC13 (By similarity).
Interacts with PDCD6; interaction takes place in response to cytosolic calcium increase and leads to bridge together the BCR(KLHL12) complex and SEC31A, leading to monoubiquitination (PubMed:27716508) (PubMed:16957052, PubMed:17196169, PubMed:27716508, PubMed:25667979).
Interacts with KLHL12.
By similarity4 PublicationsBinary interactionsi
GO - Molecular functioni
- calcium-dependent protein binding Source: UniProtKB
Protein-protein interaction databases
BioGridi | 116539, 119 interactors |
DIPi | DIP-40438N |
IntActi | O94979, 48 interactors |
MINTi | O94979 |
STRINGi | 9606.ENSP00000378721 |
Structurei
Secondary structure
3D structure databases
SMRi | O94979 |
ModBasei | Search... |
PDBe-KBi | Search... |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Repeati | 4 – 47 | WD 1Add BLAST | 44 | |
Repeati | 68 – 111 | WD 2Add BLAST | 44 | |
Repeati | 120 – 160 | WD 3Add BLAST | 41 | |
Repeati | 166 – 206 | WD 4Add BLAST | 41 | |
Repeati | 209 – 254 | WD 5Add BLAST | 46 | |
Repeati | 258 – 298 | WD 6Add BLAST | 41 | |
Repeati | 301 – 342 | WD 7Add BLAST | 42 | |
Repeati | 397 – 430 | WD 8; interaction with SEC13PROSITE-ProRule annotationAdd BLAST | 34 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 161 – 471 | Interaction with SEC131 PublicationAdd BLAST | 311 | |
Regioni | 800 – 1113 | Interaction with PDCD61 PublicationAdd BLAST | 314 |
Motif
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Motifi | 842 – 848 | ALG-2-binding site motif-2 (ABS-2), | 7 |
Compositional bias
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Compositional biasi | 800 – 1091 | Pro-richAdd BLAST | 292 |
Domaini
Sequence similaritiesi
Keywords - Domaini
Repeat, WD repeatPhylogenomic databases
eggNOGi | KOG0307 Eukaryota ENOG410XQ1D LUCA |
GeneTreei | ENSGT00390000003175 |
HOGENOMi | HOG000230582 |
InParanoidi | O94979 |
KOi | K14005 |
OrthoDBi | 100998at2759 |
PhylomeDBi | O94979 |
TreeFami | TF313842 |
Family and domain databases
Gene3Di | 2.130.10.10, 1 hit |
InterProi | View protein in InterPro IPR024298 ACE1_Sec16_Sec31 IPR040251 SEC31-like IPR015943 WD40/YVTN_repeat-like_dom_sf IPR001680 WD40_repeat IPR017986 WD40_repeat_dom IPR036322 WD40_repeat_dom_sf |
PANTHERi | PTHR13923 PTHR13923, 1 hit |
Pfami | View protein in Pfam PF12931 Sec16_C, 1 hit |
SMARTi | View protein in SMART SM00320 WD40, 6 hits |
SUPFAMi | SSF50978 SSF50978, 1 hit |
PROSITEi | View protein in PROSITE PS50082 WD_REPEATS_2, 1 hit PS50294 WD_REPEATS_REGION, 1 hit |
s (10+)i Sequence
Sequence statusi: Complete.
This entry describes 10 produced by isoformsialternative splicing. AlignAdd to basketThis entry has 10 described isoforms and 19 potential isoforms that are computationally mapped.Show allAlign All
This isoform has been chosen as the sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. canonicali
10 20 30 40 50
MKLKEVDRTA MQAWSPAQNH PIYLATGTSA QQLDATFSTN ASLEIFELDL
60 70 80 90 100
SDPSLDMKSC ATFSSSHRYH KLIWGPYKMD SKGDVSGVLI AGGENGNIIL
110 120 130 140 150
YDPSKIIAGD KEVVIAQNDK HTGPVRALDV NIFQTNLVAS GANESEIYIW
160 170 180 190 200
DLNNFATPMT PGAKTQPPED ISCIAWNRQV QHILASASPS GRATVWDLRK
210 220 230 240 250
NEPIIKVSDH SNRMHCSGLA WHPDVATQMV LASEDDRLPV IQMWDLRFAS
260 270 280 290 300
SPLRVLENHA RGILAIAWSM ADPELLLSCG KDAKILCSNP NTGEVLYELP
310 320 330 340 350
TNTQWCFDIQ WCPRNPAVLS AASFDGRISV YSIMGGSTDG LRQKQVDKLS
360 370 380 390 400
SSFGNLDPFG TGQPLPPLQI PQQTAQHSIV LPLKKPPKWI RRPVGASFSF
410 420 430 440 450
GGKLVTFENV RMPSHQGAEQ QQQQHHVFIS QVVTEKEFLS RSDQLQQAVQ
460 470 480 490 500
SQGFINYCQK KIDASQTEFE KNVWSFLKVN FEDDSRGKYL ELLGYRKEDL
510 520 530 540 550
GKKIALALNK VDGANVALKD SDQVAQSDGE ESPAAEEQLL GEHIKEEKEE
560 570 580 590 600
SEFLPSSGGT FNISVSGDID GLITQALLTG NFESAVDLCL HDNRMADAII
610 620 630 640 650
LAIAGGQELL ARTQKKYFAK SQSKITRLIT AVVMKNWKEI VESCDLKNWR
660 670 680 690 700
EALAAVLTYA KPDEFSALCD LLGTRLENEG DSLLQTQACL CYICAGNVEK
710 720 730 740 750
LVACWTKAQD GSHPLSLQDL IEKVVILRKA VQLTQAMDTS TVGVLLAAKM
760 770 780 790 800
SQYANLLAAQ GSIAAALAFL PDNTNQPNIM QLRDRLCRAQ GEPVAGHESP
810 820 830 840 850
KIPYEKQQLP KGRPGPVAGH HQMPRVQTQQ YYPHGENPPP PGFIMHGNVN
860 870 880 890 900
PNAAGQLPTS PGHMHTQVPP YPQPQPYQPA QPYPFGTGGS AMYRPQQPVA
910 920 930 940 950
PPTSNAYPNT PYISSASSYT GQSQLYAAQH QASSPTSSPA TSFPPPPSSG
960 970 980 990 1000
ASFQHGGPGA PPSSSAYALP PGTTGTLPAA SELPASQRTG PQNGWNDPPA
1010 1020 1030 1040 1050
LNRVPKKKKM PENFMPPVPI TSPIMNPLGD PQSQMLQQQP SAPVPLSSQS
1060 1070 1080 1090 1100
SFPQPHLPGG QPFHGVQQPL GQTGMPPSFS KPNIEGAPGA PIGNTFQHVQ
1110 1120 1130 1140 1150
SLPTKKITKK PIPDEHLILK TTFEDLIQRC LSSATDPQTK RKLDDASKRL
1160 1170 1180 1190 1200
EFLYDKLREQ TLSPTITSGL HNIARSIETR NYSEGLTMHT HIVSTSNFSE
1210 1220
TSAFMPVLKV VLTQANKLGV
The sequence of this isoform differs from the canonical sequence as follows:
1-228: Missing.
229-260: MVLASEDDRLPVIQMWDLRFASSPLRVLENHA → MVKLVLLSIVLLKVTVPKLSNYLLQLDFMPIH
504-542: Missing.
834-834: H → HVRIAPTVTTWSNKTPTALPSHPPAASPSDTQ
974-988: Missing.
The sequence of this isoform differs from the canonical sequence as follows:
504-542: Missing.
974-988: Missing.
Computationally mapped potential isoform sequencesi
There are 19 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basketH7BXG7 | H7BXG7_HUMAN | Protein transport protein Sec31A | SEC31A | 969 | Annotation score: | ||
D6REX3 | D6REX3_HUMAN | Protein transport protein Sec31A | SEC31A | 1,251 | Annotation score: | ||
D6RHZ5 | D6RHZ5_HUMAN | Protein transport protein Sec31A | SEC31A | 877 | Annotation score: | ||
H0YAB3 | H0YAB3_HUMAN | Protein transport protein Sec31A | SEC31A | 443 | Annotation score: | ||
H0Y8W8 | H0Y8W8_HUMAN | Protein transport protein Sec31A | SEC31A | 383 | Annotation score: | ||
H0Y9T9 | H0Y9T9_HUMAN | Protein transport protein Sec31A | SEC31A | 235 | Annotation score: | ||
H0Y9V3 | H0Y9V3_HUMAN | Protein transport protein Sec31A | SEC31A | 219 | Annotation score: | ||
H0YAF5 | H0YAF5_HUMAN | Protein transport protein Sec31A | SEC31A | 181 | Annotation score: | ||
D6RCQ9 | D6RCQ9_HUMAN | Protein transport protein Sec31A | SEC31A | 166 | Annotation score: | ||
D6RE64 | D6RE64_HUMAN | Protein transport protein Sec31A | SEC31A | 164 | Annotation score: | ||
There are more potential isoformsShow all |
Sequence cautioni
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 200 | K → E in BAA84923 (Ref. 2) Curated | 1 | |
Sequence conflicti | 284 | K → R in BAC86336 (PubMed:14702039).Curated | 1 | |
Sequence conflicti | 854 | A → S in BAA84923 (Ref. 2) Curated | 1 | |
Sequence conflicti | 854 | A → S in BAA84924 (Ref. 2) Curated | 1 | |
Sequence conflicti | 1007 | K → R in BAG58628 (PubMed:14702039).Curated | 1 |
Natural variant
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Natural variantiVAR_033225 | 263 | I → V. Corresponds to variant dbSNP:rs34554214Ensembl. | 1 | |
Natural variantiVAR_053414 | 456 | N → K. Corresponds to variant dbSNP:rs3797036Ensembl. | 1 | |
Natural variantiVAR_033226 | 841 | P → L. Corresponds to variant dbSNP:rs35579207Ensembl. | 1 | |
Natural variantiVAR_033227 | 1055 | P → T. Corresponds to variant dbSNP:rs35739017Ensembl. | 1 |
Alternative sequence
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Alternative sequenceiVSP_026742 | 1 – 228 | Missing in isoform 7. 1 PublicationAdd BLAST | 228 | |
Alternative sequenceiVSP_044602 | 1 – 26 | MKLKE…IYLAT → MLGESDERCTNAGSGCRRSS P in isoform 9. 1 PublicationAdd BLAST | 26 | |
Alternative sequenceiVSP_026743 | 229 – 260 | MVLAS…LENHA → MVKLVLLSIVLLKVTVPKLS NYLLQLDFMPIH in isoform 7. 1 PublicationAdd BLAST | 32 | |
Alternative sequenceiVSP_026744 | 504 – 542 | Missing in isoform 4, isoform 6, isoform 7 and isoform 10. 4 PublicationsAdd BLAST | 39 | |
Alternative sequenceiVSP_026745 | 504 – 509 | IALALN → VNFWES in isoform 5. 1 Publication | 6 | |
Alternative sequenceiVSP_026746 | 510 – 1220 | Missing in isoform 5. 1 PublicationAdd BLAST | 711 | |
Alternative sequenceiVSP_026747 | 834 | H → HVRIAPTVTTWSNKTPTALP SHPPAASPSDTQ in isoform 7. 1 Publication | 1 | |
Alternative sequenceiVSP_026748 | 876 | P → R in isoform 3 and isoform 6. 2 Publications | 1 | |
Alternative sequenceiVSP_026749 | 877 – 990 | Missing in isoform 3 and isoform 6. 2 PublicationsAdd BLAST | 114 | |
Alternative sequenceiVSP_026750 | 974 – 988 | Missing in isoform 2, isoform 7, isoform 9 and isoform 10. 2 PublicationsAdd BLAST | 15 | |
Alternative sequenceiVSP_026751 | 989 | T → TENQSIQDQAPMLE in isoform 8. 1 Publication | 1 |
Sequence databases
Genome annotation databases
Keywords - Coding sequence diversityi
Alternative splicing, Chromosomal rearrangement, PolymorphismSimilar proteinsi
Cross-referencesi
Sequence databases
3D structure databases
Select the link destinations: PDBei RCSB PDBi PDBji Links Updated | PDB entry | Method | Resolution (Å) | Chain | Positions | PDBsum |
3WXA | X-ray | 2.36 | C/D | 837-848 | [»] | |
SMRi | O94979 | |||||
ModBasei | Search... | |||||
PDBe-KBi | Search... |
Protein-protein interaction databases
BioGridi | 116539, 119 interactors |
DIPi | DIP-40438N |
IntActi | O94979, 48 interactors |
MINTi | O94979 |
STRINGi | 9606.ENSP00000378721 |
Protein family/group databases
TCDBi | 3.A.5.9.1 the general secretory pathway (sec) family |
PTM databases
iPTMneti | O94979 |
PhosphoSitePlusi | O94979 |
SwissPalmi | O94979 |
Polymorphism and mutation databases
BioMutai | SEC31A |
Proteomic databases
EPDi | O94979 |
jPOSTi | O94979 |
MassIVEi | O94979 |
MaxQBi | O94979 |
PaxDbi | O94979 |
PeptideAtlasi | O94979 |
PRIDEi | O94979 |
ProteomicsDBi | 45124 50595 [O94979-1] 50596 [O94979-2] 50597 [O94979-3] 50598 [O94979-4] 50599 [O94979-5] 50600 [O94979-6] 50601 [O94979-7] 50602 [O94979-8] 7204 |
Genome annotation databases
Organism-specific databases
CTDi | 22872 |
DisGeNETi | 22872 |
GeneCardsi | SEC31A |
HGNCi | HGNC:17052 SEC31A |
HPAi | HPA005457 |
MIMi | 610257 gene |
neXtProti | NX_O94979 |
OpenTargetsi | ENSG00000138674 |
PharmGKBi | PA162402737 |
HUGEi | Search... |
GenAtlasi | Search... |
Phylogenomic databases
eggNOGi | KOG0307 Eukaryota ENOG410XQ1D LUCA |
GeneTreei | ENSGT00390000003175 |
HOGENOMi | HOG000230582 |
InParanoidi | O94979 |
KOi | K14005 |
OrthoDBi | 100998at2759 |
PhylomeDBi | O94979 |
TreeFami | TF313842 |
Enzyme and pathway databases
Reactomei | R-HSA-204005 COPII-mediated vesicle transport R-HSA-2132295 MHC class II antigen presentation R-HSA-381038 XBP1(S) activates chaperone genes R-HSA-983170 Antigen Presentation: Folding, assembly and peptide loading of class I MHC |
SignaLinki | O94979 |
Miscellaneous databases
ChiTaRSi | SEC31A human |
GeneWikii | SEC31A |
GenomeRNAii | 22872 |
Pharosi | O94979 |
PROi | PR:O94979 |
SOURCEi | Search... |
Gene expression databases
Bgeei | ENSG00000138674 Expressed in 236 organ(s), highest expression level in pituitary gland |
ExpressionAtlasi | O94979 baseline and differential |
Genevisiblei | O94979 HS |
Family and domain databases
Gene3Di | 2.130.10.10, 1 hit |
InterProi | View protein in InterPro IPR024298 ACE1_Sec16_Sec31 IPR040251 SEC31-like IPR015943 WD40/YVTN_repeat-like_dom_sf IPR001680 WD40_repeat IPR017986 WD40_repeat_dom IPR036322 WD40_repeat_dom_sf |
PANTHERi | PTHR13923 PTHR13923, 1 hit |
Pfami | View protein in Pfam PF12931 Sec16_C, 1 hit |
SMARTi | View protein in SMART SM00320 WD40, 6 hits |
SUPFAMi | SSF50978 SSF50978, 1 hit |
PROSITEi | View protein in PROSITE PS50082 WD_REPEATS_2, 1 hit PS50294 WD_REPEATS_REGION, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | SC31A_HUMAN | |
Accessioni | O94979Primary (citable) accession number: O94979 Secondary accession number(s): B4DIW6 Q9UM06 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | July 10, 2007 |
Last sequence update: | July 10, 2007 | |
Last modified: | October 16, 2019 | |
This is version 170 of the entry and version 3 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program | |
Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. |
Miscellaneousi
Keywords - Technical termi
3D-structure, Complete proteome, Reference proteomeDocuments
- Human entries with polymorphisms or disease mutations
List of human entries with polymorphisms or disease mutations - SIMILARITY comments
Index of protein domains and families - Human chromosome 4
Human chromosome 4: entries, gene names and cross-references to MIM - Human polymorphisms and disease mutations
Index of human polymorphisms and disease mutations - MIM cross-references
Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot - PDB cross-references
Index of Protein Data Bank (PDB) cross-references