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1XX2

Refinement of P99 beta-lactamase from Enterobacter cloacae

Replaces:  2BLT
Functional Information from GO Data
ChainGOidnamespacecontents
A0008800molecular_functionbeta-lactamase activity
A0016787molecular_functionhydrolase activity
A0017001biological_processantibiotic catabolic process
A0030288cellular_componentouter membrane-bounded periplasmic space
A0042597cellular_componentperiplasmic space
A0046677biological_processresponse to antibiotic
B0008800molecular_functionbeta-lactamase activity
B0016787molecular_functionhydrolase activity
B0017001biological_processantibiotic catabolic process
B0030288cellular_componentouter membrane-bounded periplasmic space
B0042597cellular_componentperiplasmic space
B0046677biological_processresponse to antibiotic
Functional Information from PROSITE/UniProt
site_idPS00336
Number of Residues8
DetailsBETA_LACTAMASE_C Beta-lactamase class-C active site. FELGSISK
ChainResidueDetails
APHE60-LYS67

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"description":"Acyl-ester intermediate"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"description":"Proton acceptor"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues4
DetailsBinding site: {}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues5
Detailsa catalytic site defined by CSA, PubMed 10813827
ChainResidueDetails
AGLU272
ASER64
ALYS315
ATYR150
ALYS67

site_idCSA2
Number of Residues5
Detailsa catalytic site defined by CSA, PubMed 10813827
ChainResidueDetails
BGLU272
BSER64
BLYS315
BTYR150
BLYS67

site_idMCSA1
Number of Residues6
DetailsM-CSA 257
ChainResidueDetails
ASER64electrostatic stabiliser, hydrogen bond donor
ALYS67electrostatic stabiliser, hydrogen bond donor, increase acidity
ATYR150hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
AGLU272electrostatic stabiliser, hydrogen bond acceptor
ALYS315electrostatic stabiliser, hydrogen bond donor, increase acidity
ASER318electrostatic stabiliser, hydrogen bond donor

site_idMCSA2
Number of Residues6
DetailsM-CSA 257
ChainResidueDetails
BSER1064electrostatic stabiliser, hydrogen bond donor
BLYS1067electrostatic stabiliser, hydrogen bond donor, increase acidity
BTYR1150hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
BGLU1272electrostatic stabiliser, hydrogen bond acceptor
BLYS1315electrostatic stabiliser, hydrogen bond donor, increase acidity
BSER1318electrostatic stabiliser, hydrogen bond donor

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PDB entries from 2025-08-27

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