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5XWJ

Crystal Structure of Porcine pancreatic trypsin with tripeptide inhibitor, TRE, at pH 7

Functional Information from GO Data
ChainGOidnamespacecontents
A0004252molecular_functionserine-type endopeptidase activity
A0005515molecular_functionprotein binding
A0005576cellular_componentextracellular region
A0005615cellular_componentextracellular space
A0006508biological_processproteolysis
A0007586biological_processdigestion
A0008233molecular_functionpeptidase activity
A0008236molecular_functionserine-type peptidase activity
A0016787molecular_functionhydrolase activity
A0046872molecular_functionmetal ion binding
B0004252molecular_functionserine-type endopeptidase activity
B0005515molecular_functionprotein binding
B0005576cellular_componentextracellular region
B0005615cellular_componentextracellular space
B0006508biological_processproteolysis
B0007586biological_processdigestion
B0008233molecular_functionpeptidase activity
B0008236molecular_functionserine-type peptidase activity
B0016787molecular_functionhydrolase activity
B0046872molecular_functionmetal ion binding
Functional Information from PDB Data
site_idAC1
Number of Residues6
Detailsbinding site for residue CA A 301
ChainResidue
AGLU60
AASN62
AVAL65
AGLU70
AHOH403
AHOH492

site_idAC2
Number of Residues8
Detailsbinding site for residue MPD A 302
ChainResidue
ACYS191
AASN192
AGLY193
BSER158
BPRO161
AGLU123
ACYS124
AVAL190

site_idAC3
Number of Residues6
Detailsbinding site for residue CA B 300
ChainResidue
BGLU60
BASN62
BVAL65
BGLU70
BHOH404
BHOH458

site_idAC4
Number of Residues10
Detailsbinding site for Di-peptide ACE D 401 and THR D 402
ChainResidue
BHIS48
BLEU89
BGLN182
BSER200
BTRP201
BGLY202
BHOH426
DARG403
DHOH501
DHOH502

Functional Information from PROSITE/UniProt
site_idPS00134
Number of Residues6
DetailsTRYPSIN_HIS Serine proteases, trypsin family, histidine active site. VSAAHC
ChainResidueDetails
AVAL44-CYS49

site_idPS00135
Number of Residues12
DetailsTRYPSIN_SER Serine proteases, trypsin family, serine active site. DScqGDSGGPVV
ChainResidueDetails
AASP179-VAL190

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues220
DetailsDomain: {"description":"Peptidase S1","evidences":[{"source":"PROSITE-ProRule","id":"PRU00274","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues6
DetailsActive site: {"description":"Charge relay system"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues8
DetailsBinding site: {}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsSite: {"description":"Required for specificity","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

247947

PDB entries from 2026-01-21

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