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2ZQ2

Exploring trypsin S3 pocket

Functional Information from GO Data
ChainGOidnamespacecontents
A0004175molecular_functionendopeptidase activity
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
A0097180cellular_componentserine protease inhibitor complex
A0097655molecular_functionserpin family protein binding
Functional Information from PDB Data
site_idAC1
Number of Residues6
DetailsBINDING SITE FOR RESIDUE CA A 601
ChainResidue
AGLU70
AASN72
AVAL75
AGLU80
AHOH1007
AHOH1027

site_idAC2
Number of Residues19
DetailsBINDING SITE FOR RESIDUE 13U A 501
ChainResidue
ALEU99
AGLN175
AASP189
ASER190
ACYS191
AGLN192
ASER195
ASER214
ATRP215
AGLY216
ASER217
AGLY219
ACYS220
AGLY226
AHOH1001
AHOH1234
AHIS57
AASN97
ATHR98

site_idAC3
Number of Residues9
DetailsBINDING SITE FOR RESIDUE GOL A 701
ChainResidue
ATYR59
AASN79
AVAL90
AHOH1015
AHOH1025
AHOH1042
AHOH1062
AHOH1147
AHOH1189

site_idAC4
Number of Residues6
DetailsBINDING SITE FOR RESIDUE GOL A 702
ChainResidue
AARG66
ASER167
ASER170
AHOH1065
AHOH1103
AHOH1162

site_idAC5
Number of Residues7
DetailsBINDING SITE FOR RESIDUE GOL A 703
ChainResidue
AHIS40
AALA132
ATYR151
AHOH1040
AHOH1109
AHOH1227
AHOH1251

site_idAC6
Number of Residues3
DetailsBINDING SITE FOR RESIDUE GOL A 704
ChainResidue
ATYR20
ACYS22
ATHR26

Functional Information from PROSITE/UniProt
site_idPS00134
Number of Residues6
DetailsTRYPSIN_HIS Serine proteases, trypsin family, histidine active site. VSAAHC
ChainResidueDetails
AVAL53-CYS58

site_idPS00135
Number of Residues12
DetailsTRYPSIN_SER Serine proteases, trypsin family, serine active site. DScqGDSGGPVV
ChainResidueDetails
AASP189-VAL200

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 Residues3
DetailsActive site: {"description":"Charge relay system"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues7
DetailsBinding site: {}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues3
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
AASP102
ASER195
AHIS57

site_idCSA2
Number of Residues2
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
AASP102
AHIS57

site_idCSA3
Number of Residues2
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
ASER195
AGLY193

site_idCSA4
Number of Residues2
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
ASER195
AGLY196

site_idCSA5
Number of Residues4
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
AASP102
ASER195
AGLY193
AHIS57

site_idCSA6
Number of Residues4
DetailsAnnotated By Reference To The Literature 1a0j
ChainResidueDetails
AASP102
ASER195
AHIS57
AGLY196

239149

PDB entries from 2025-07-23

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