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1F34

CRYSTAL STRUCTURE OF ASCARIS PEPSIN INHIBITOR-3 BOUND TO PORCINE PEPSIN

Functional Information from GO Data
ChainGOidnamespacecontents
A0004190molecular_functionaspartic-type endopeptidase activity
A0006508biological_processproteolysis
B0005576cellular_componentextracellular region
B0019828molecular_functionaspartic-type endopeptidase inhibitor activity
B0030414molecular_functionpeptidase inhibitor activity
Functional Information from PDB Data
site_idAC1
Number of Residues5
DetailsBINDING SITE FOR RESIDUE MPD A 327
ChainResidue
ATYR75
ATHR77
AGLY78
ALEU112
AILE120

Functional Information from PROSITE/UniProt
site_idPS00141
Number of Residues12
DetailsASP_PROTEASE Eukaryotic and viral aspartyl proteases active site. VIFDTGSSNLWV
ChainResidueDetails
AVAL29-VAL40
AALA212-GLY223

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10094","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"1097438","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"4897201","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"UniProtKB","id":"P03954","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsModified residue: {"description":"Pyrrolidone carboxylic acid","evidences":[{"source":"PubMed","id":"2223768","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues1
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP32

site_idCSA2
Number of Residues1
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215

site_idCSA3
Number of Residues4
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215
ASER35
ATHR218
AASP32

site_idCSA4
Number of Residues4
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215
ATHR216
AASP32
ATHR33

site_idCSA5
Number of Residues3
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215
ASER35
AASP32

site_idCSA6
Number of Residues4
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215
ATYR75
ASER35
AASP32

site_idCSA7
Number of Residues4
DetailsAnnotated By Reference To The Literature 1am5
ChainResidueDetails
AASP215
ATHR218
AASP32
ATHR33

244693

PDB entries from 2025-11-12

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