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3TNX

Structure of the precursor of a thermostable variant of papain at 2.6 Angstroem resolution

Functional Information from GO Data
ChainGOidnamespacecontents
A0005515molecular_functionprotein binding
A0006508biological_processproteolysis
A0008233molecular_functionpeptidase activity
A0008234molecular_functioncysteine-type peptidase activity
A0016787molecular_functionhydrolase activity
A0097655molecular_functionserpin family protein binding
C0005515molecular_functionprotein binding
C0006508biological_processproteolysis
C0008233molecular_functionpeptidase activity
C0008234molecular_functioncysteine-type peptidase activity
C0016787molecular_functionhydrolase activity
C0097655molecular_functionserpin family protein binding
Functional Information from PDB Data
site_idAC1
Number of Residues3
DetailsBINDING SITE FOR RESIDUE CL A 320
ChainResidue
AASN191
ATHR192
ACYS260

Functional Information from PROSITE/UniProt
site_idPS00639
Number of Residues11
DetailsTHIOL_PROTEASE_HIS Eukaryotic thiol (cysteine) proteases histidine active site. VDHAVAAVGYG
ChainResidueDetails
AVAL264-GLY274

site_idPS00640
Number of Residues20
DetailsTHIOL_PROTEASE_ASN Eukaryotic thiol (cysteine) proteases asparagine active site. YILiRNSWgtgWGenGYIrI
ChainResidueDetails
ATYR277-ILE296

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10088","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"5681232","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"1860874","evidenceCode":"ECO:0000305"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10089","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10090","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"5681232","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"description":"covalent","evidences":[{"source":"PubMed","id":"8416808","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1POP","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues4
DetailsM-CSA 174
ChainResidueDetails
AGLN126electrostatic stabiliser, hydrogen bond donor
AALA132electrostatic stabiliser
AHIS266electrostatic stabiliser, hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
AASN282activator, electrostatic stabiliser, hydrogen bond acceptor

site_idMCSA2
Number of Residues4
DetailsM-CSA 174
ChainResidueDetails

243531

PDB entries from 2025-10-22

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