3LNB image
Entry Detail
PDB ID:
3LNB
Keywords:
Title:
Crystal Structure Analysis of Arylamine N-acetyltransferase C from Bacillus anthracis
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2010-02-02
Release Date:
2011-01-26
Method Details:
Experimental Method:
Resolution:
2.01 Å
R-Value Free:
0.24
R-Value Work:
0.20
Space Group:
P 41 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:N-acetyltransferase family protein
Mutations:Y38F
Chain IDs:A
Chain Length:309
Number of Molecules:1
Biological Source:Bacillus anthracis
Primary Citation
The Bacillus anthracis arylamine N-acetyltransferase ((BACAN)NAT1) that inactivates sulfamethoxazole, reveals unusual structural features compared with the other NAT isoenzymes.
Febs Lett. 585 3947 3952 (2011)
PMID: 22062153 DOI: 10.1016/j.febslet.2011.10.041

Abstact

Arylamine N-acetyltransferases (NATs) are xenobiotic-metabolizing enzymes that biotransform arylamine drugs. The Bacillus anthracis (BACAN)NAT1 enzyme affords increased resistance to the antibiotic sulfamethoxazole through its acetylation. We report the structure of (BACAN)NAT1. Unexpectedly, endogenous coenzymeA was present in the active site. The structure suggests that, contrary to the other prokaryotic NATs, (BACAN)NAT1 possesses a 14-residue insertion equivalent to the "mammalian insertion", a structural feature considered unique to mammalian NATs. Moreover, (BACAN)NAT1 structure shows marked differences in the mode of binding and location of coenzymeA when compared to the other NATs. This suggests that the mechanisms of cofactor recognition by NATs is more diverse than expected and supports the cofactor-binding site as being a unique subsite to target in drug design against bacterial NATs.

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