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6KBR

Crystal structure of Human KLK4 and SPINK2 derived KLK4 inhibitor complex

Functional Information from GO Data
ChainGOidnamespacecontents
A0004252molecular_functionserine-type endopeptidase activity
A0006508biological_processproteolysis
C0004867molecular_functionserine-type endopeptidase inhibitor activity
C0007286biological_processspermatid development
Functional Information from PDB Data
site_idAC1
Number of Residues5
Detailsbinding site for residue GOL A 301
ChainResidue
ASER147
AILE212
ACYS213
AASN214
AGLY215

Functional Information from PROSITE/UniProt
site_idPS00282
Number of Residues23
DetailsKAZAL_1 Kazal serine protease inhibitors family signature. CnrmyApvCgSdmstYaneCtl.C
ChainResidueDetails
CCYS23-CYS45

site_idPS00134
Number of Residues6
DetailsTRYPSIN_HIS Serine proteases, trypsin family, histidine active site. LSAAHC
ChainResidueDetails
ALEU67-CYS72

site_idPS00135
Number of Residues12
DetailsTRYPSIN_SER Serine proteases, trypsin family, serine active site. DScnGDSGGPLI
ChainResidueDetails
AASP201-ILE212

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues221
DetailsDomain: {"description":"Peptidase S1","evidences":[{"source":"PROSITE-ProRule","id":"PRU00274","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues3
DetailsActive site: {"description":"Charge relay system","evidences":[{"source":"PubMed","id":"16950394","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"16950394","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues1
DetailsGlycosylation: {"description":"N-linked (GlcNAc...) asparagine","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues1
DetailsSite: {"description":"Reactive bond"}
ChainResidueDetails

246905

PDB entries from 2025-12-31

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