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2PNS

1.9 Angstrom resolution crystal structure of a plant cysteine protease Ervatamin-C refinement with cDNA derived amino acid sequence

Functional Information from GO Data
ChainGOidnamespacecontents
A0004197molecular_functioncysteine-type endopeptidase activity
A0005576cellular_componentextracellular region
A0006508biological_processproteolysis
A0008233molecular_functionpeptidase activity
A0008234molecular_functioncysteine-type peptidase activity
A0016787molecular_functionhydrolase activity
B0004197molecular_functioncysteine-type endopeptidase activity
B0005576cellular_componentextracellular region
B0006508biological_processproteolysis
B0008233molecular_functionpeptidase activity
B0008234molecular_functioncysteine-type peptidase activity
B0016787molecular_functionhydrolase activity
Functional Information from PDB Data
site_idAC1
Number of Residues3
DetailsBINDING SITE FOR RESIDUE PO4 A 300
ChainResidue
AHIS113
BHIS113
BHOH733

site_idAC2
Number of Residues10
DetailsBINDING SITE FOR RESIDUE THJ A 601
ChainResidue
AGLY65
AGLY66
AHOH708
AHOH718
AGLN19
ACYS22
AGLY23
ASER24
ACYS25
ATRP26

site_idAC3
Number of Residues7
DetailsBINDING SITE FOR RESIDUE THJ B 602
ChainResidue
BGLN19
BGLY23
BSER24
BCYS25
BTRP26
BHIS157
BHOH720

Functional Information from PROSITE/UniProt
site_idPS00139
Number of Residues12
DetailsTHIOL_PROTEASE_CYS Eukaryotic thiol (cysteine) proteases cysteine active site. QGkCGSCWAfST
ChainResidueDetails
AGLN19-THR30

site_idPS00640
Number of Residues20
DetailsTHIOL_PROTEASE_ASN Eukaryotic thiol (cysteine) proteases asparagine active site. YWIvRNSWgryWGeqGYIrM
ChainResidueDetails
ATYR168-MET187

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10088","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10089","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10090","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"description":"covalent","evidences":[{"source":"UniProtKB","id":"A8DS38","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
ACYS25
AASN173
AHIS157

site_idCSA2
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
BCYS25
BASN173
BHIS157

site_idCSA3
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
AGLN19
ACYS25
AHIS157

site_idCSA4
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
BGLN19
BCYS25
BHIS157

site_idCSA5
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
AGLN19
AASN173
AHIS157

site_idCSA6
Number of Residues3
DetailsAnnotated By Reference To The Literature 1pad
ChainResidueDetails
BGLN19
BASN173
BHIS157

238895

PDB entries from 2025-07-16

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