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1HPT

THREE-DIMENSIONAL STRUCTURE OF A RECOMBINANT VARIANT OF HUMAN PANCREATIC SECRETORY TRYPSIN INHIBITOR (KAZAL TYPE)

Functional Information from GO Data
ChainGOidnamespacecontents
A0004866molecular_functionendopeptidase inhibitor activity
A0004867molecular_functionserine-type endopeptidase inhibitor activity
A0005515molecular_functionprotein binding
A0005576cellular_componentextracellular region
A0005615cellular_componentextracellular space
A0007263biological_processnitric oxide mediated signal transduction
A0010751biological_processnegative regulation of nitric oxide mediated signal transduction
A0030414molecular_functionpeptidase inhibitor activity
A0048240biological_processsperm capacitation
A0060046biological_processregulation of acrosome reaction
A0070062cellular_componentextracellular exosome
A0090281biological_processnegative regulation of calcium ion import
A2001256biological_processregulation of store-operated calcium entry
Functional Information from PROSITE/UniProt
site_idPS00282
Number of Residues23
DetailsKAZAL_1 Kazal serine protease inhibitors family signature. CtyeyRpvCgTdgdtYpneCvl.C
ChainResidueDetails
ACYS16-CYS38

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues53
DetailsDomain: {"description":"Kazal-like","evidences":[{"source":"PROSITE-ProRule","id":"PRU00798","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsSite: {"description":"Reactive bond for trypsin","evidences":[{"source":"UniProtKB","id":"P09036","evidenceCode":"ECO:0000250"},{"source":"PROSITE-ProRule","id":"PRU00798","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsSite: {"description":"Necessary for sperm binding","evidences":[{"source":"UniProtKB","id":"P09036","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

239492

PDB entries from 2025-07-30

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