期刊
FEBS LETTERS
卷 593, 期 6, 页码 622-633出版社
WILEY
DOI: 10.1002/1873-3468.13339
关键词
acyl carrier protein; coenzyme A; fatty acid synthase; fluorescence spectroscopy; molecular dynamics; Mycobacterium tuberculosis
资金
- DBT, Government of India [BT/PR12404/BRB/10/1362/2014]
- CSIR
- IIT Kharagpur
In Mycobacterium tuberculosis, acyl carrier protein (AcpM)-mediated fatty acid synthase type II is integral for the synthesis of mycolic acids. AcpM, designated as an atypical ACP, comprises of a putative 33 amino acid long C-terminal extension which is distinctive in nature. Here, we aimed at devising an 'easy-to-go' method for the generation of crypto-AcpM loaded with a solvatochromic probe 7-Nitrobenz-2-oxa-1,3-diazol-4-yl, which is linked to the 4 '-phosphopantetheine (Ppant) prosthetic group of AcpM. The crypto-AcpM, coupled with fluorescence spectroscopy and molecular dynamics simulation studies, was employed to explore the elusive dynamics of Ppant arm in AcpM. This investigation establishes the role of the flexible C-terminal extension of AcpM in regulating the prosthetic group sequestration ability by modulating the 'Asp-Ser-Leu' motif.
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