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1N9B

Ultrahigh resolution structure of a class A beta-lactamase: On the mechanism and specificity of the extended-spectrum SHV-2 enzyme

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 Residues19
DetailsBINDING SITE FOR RESIDUE MA4 A 300
ChainResidue
AARG93
AILE263
AALA280
AALA284
AGLU288
AHOH505
AHOH544
AHOH596
AHOH621
AHOH626
AHOH688
AHIS96
AARG98
AVAL224
ALEU225
APRO226
AILE246
AALA248
AVAL261

site_idAC2
Number of Residues3
DetailsBINDING SITE FOR RESIDUE MA4 A 310
ChainResidue
AARG244
AILE246
AILE279

site_idAC3
Number of Residues11
DetailsBINDING SITE FOR RESIDUE EPE A 400
ChainResidue
ASER70
ATYR105
ASER130
AVAL216
ALYS234
ATHR235
AGLY236
AALA237
AARG244
AHOH515
AHOH716

site_idAC4
Number of Residues8
DetailsBINDING SITE FOR RESIDUE MPD A 500
ChainResidue
AALA82
AGLN154
AASP176
AARG198
AHOH587
AHOH592
AHOH652
AHOH791

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

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsActive site: {"description":"Acyl-ester intermediate","evidences":[{"source":"PROSITE-ProRule","id":"PRU10101","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsActive site: {"description":"Proton acceptor","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

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

246704

PDB entries from 2025-12-24

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