Crystal structure of the essential biotin-dependent carboxylase AccA3 from Mycobacterium tuberculosis.
Bennett, M., Hogbom, M.(2017) FEBS Open Bio 7: 620-626
- PubMed: 28469974 
- DOI: https://doi.org/10.1002/2211-5463.12212
- Primary Citation of Related Structures:  
5MLK - PubMed Abstract: 
Biotin-dependent acetyl-CoA carboxylases catalyze the committed step in type II fatty acid biosynthesis, the main route for production of membrane phospholipids in bacteria, and are considered a key target for antibacterial drug discovery. Here we describe the first structure of AccA3, an essential component of the acetyl-CoA carboxylase system in Mycobacterium tuberculosis (MTb). The structure, sequence comparisons, and modeling of ligand-bound states reveal that the ATP cosubstrate-binding site shows distinct differences compared to other bacterial and eukaryotic biotin carboxylases, including all human homologs. This suggests the possibility to design MTb AccA3 subtype-specific inhibitors. Coordinates and structure factors have been deposited in the Protein Data Bank with the accession number 5MLK.
Organizational Affiliation: 
Department of Biochemistry and Biophysics Arrhenius Laboratories for Natural Sciences Stockholm University Sweden.