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2ZQ8

Apo structure of class a beta-lactamase Toho-1 R274N/R276N double mutant

Functional Information from GO Data
ChainGOidnamespacecontents
A0008800molecular_functionbeta-lactamase activity
A0016787molecular_functionhydrolase activity
A0017001biological_processantibiotic catabolic process
A0030655biological_processbeta-lactam antibiotic catabolic process
A0046677biological_processresponse to antibiotic
Functional Information from PDB Data
site_idAC1
Number of Residues10
DetailsBINDING SITE FOR RESIDUE SO4 A 1
ChainResidue
ATRP229
AHOH636
APRO252
AGLU254
AASN255
AHIS256
APHE290
AHOH590
AHOH605
AHOH607

site_idAC2
Number of Residues13
DetailsBINDING SITE FOR RESIDUE SO4 A 2
ChainResidue
ALYS82
AALA198
AASN274
AASN276
AASP277
AHOH368
AHOH386
AHOH418
AHOH430
AHOH436
AHOH439
AHOH442
AHOH525

site_idAC3
Number of Residues7
DetailsBINDING SITE FOR RESIDUE SO4 A 3
ChainResidue
AALA52
AARG178
AHOH329
AHOH355
AHOH420
AHOH645
AHOH646

site_idAC4
Number of Residues12
DetailsBINDING SITE FOR RESIDUE SO4 A 4
ChainResidue
ASER70
ASER130
ALYS234
ATHR235
AGLY236
ASER237
AHOH352
AHOH372
AHOH509
AHOH547
AHOH657
AHOH684

site_idAC5
Number of Residues5
DetailsBINDING SITE FOR RESIDUE SO4 A 5
ChainResidue
ALYS88
AHIS89
AASN92
AHOH328
AHOH388

Functional Information from PROSITE/UniProt
site_idPS00146
Number of Residues16
DetailsBETA_LACTAMASE_A Beta-lactamase class-A active site. FaMCSTsKvmaAAAVL
ChainResidueDetails
APHE66-LEU81

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsActive site: {"description":"Nucleophile; acyl-ester intermediate","evidences":[{"source":"UniProtKB","id":"P62593","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"description":"Proton acceptor","evidences":[{"source":"UniProtKB","id":"P62593","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsActive site: {"description":"Proton donor","evidences":[{"source":"UniProtKB","id":"P62593","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues4
DetailsAnnotated By Reference To The Literature 1btl
ChainResidueDetails
AGLU166
ALYS73
ASER130
ASER70

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PDB entries from 2026-02-11

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