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2CLA

CRYSTAL STRUCTURE OF THE ASP-199-ASN MUTANT OF CHLORAMPHENICOL ACETYLTRANSFERASE TO 2.35 ANGSTROMS RESOLUTION. STRUCTURAL CONSEQUENCES OF DISRUPTION OF A BURIED SALT-BRIDGE

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
AHOH282
AHOH282

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: Proton acceptor
ChainResidueDetails
AHIS195

Catalytic Information from CSA
site_idCSA1
Number of Residues3
DetailsAnnotated By Reference To The Literature 3cla
ChainResidueDetails
AASN199
AHIS195
AARG18

site_idMCSA1
Number of Residues4
DetailsM-CSA 934
ChainResidueDetails
AARG18electrostatic stabiliser
ATHR174activator, transition state stabiliser
AHIS195proton shuttle (general acid/base)
AASN199electrostatic stabiliser, modifies pKa

237735

PDB entries from 2025-06-18

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