7q3a

Publication Abstract from PubMed

Mycobacterium abscessus is a pathogenic non-tuberculous mycobacterium that possesses an intrinsic drug-resistance profile. Several N-acetyltransferases mediate drug resistance and/or participate in M. abscessus virulence. Mining the M. abscessus genome has revealed genes encoding additional N-acetyltransferases whose functions remain uncharacterized, among them MAB_4324c. Here, we showed that the purified MAB_4324c protein is a N-acetyltransferase able to acetylate small polyamine substrates. The crystal structure of MAB_4324c was solved at high resolution in complex with its cofactor, revealing the presence of two GCN5-related N-acetyltransferase domains and a cryptic binding site for NADPH. Genetic studies demonstrate that MAB_4324c is not essential for in vitro growth of M. abscessus, however overexpression of the protein enhanced the uptake and survival of M. abscessus in THP-1 macrophages.

Biochemical, structural, and functional studies reveal that MAB_4324c from Mycobacterium abscessus is an active tandem repeat N-acetyltransferase.,M A B Alsarraf H, Lam Ung K, Johansen MD, Dimon J, Olieric V, Kremer L, Blaise M FEBS Lett. 2022 Apr 25. doi: 10.1002/1873-3468.14360. PMID:35470425^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.