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1CIA

REPLACEMENT OF CATALYTIC HISTIDINE-195 OF CHLORAMPHENICOL ACETYLTRANSFERASE: EVIDENCE FOR A GENERAL BASE ROLE FOR GLUTAMATE

Functional Information from GO Data
ChainGOidnamespacecontents
A0008811molecular_functionchloramphenicol O-acetyltransferase activity
A0016740molecular_functiontransferase activity
A0016746molecular_functionacyltransferase activity
A0046677biological_processresponse to antibiotic
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE CO A 222
ChainResidue
AGLU23
AGLU23
AHIS27
AHIS27

site_idAC2
Number of Residues2
DetailsBINDING SITE FOR RESIDUE CO A 223
ChainResidue
AHOH341
AHOH341

site_idAC3
Number of Residues1
DetailsBINDING SITE FOR RESIDUE BME A 536
ChainResidue
ATYR25

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: Proton acceptor
ChainResidueDetails
AGLN195

Catalytic Information from CSA
site_idMCSA1
Number of Residues4
DetailsM-CSA 934
ChainResidueDetails
AARG18electrostatic stabiliser
ATHR174activator, transition state stabiliser
AGLN195proton shuttle (general acid/base)
AASP199electrostatic stabiliser, modifies pKa

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PDB entries from 2024-04-17

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