5ZY8

Crystal structure of C terminal truncated HadBC (3R-Hydroxyacyl-ACP Dehydratase) complex from Mycobacterium tuberculosis

5ZY8 の概要

• エントリーDOI: 10.2210/pdb5zy8/pdb
• 分子名称: UPF0336 protein Rv0637, 3-hydroxyacyl-ACP dehydratase (3 entities in total)
• 機能のキーワード: heterodimer, complex, hot-dog fold, dehydratase, lyase
• 由来する生物種: Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv); 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 66177.46

構造登録者

Singh, B.K.,Biswas, R.,Bhattacharyya, S.,Basak, A.,Das, A.K. (登録日: 2018-05-23, 公開日: 2019-06-12, 最終更新日: 2023-11-22)

主引用文献

Singh, B.K.,Biswas, R.,Bhattacharyya, S.,Basak, A.,Das, A.K.
The C-terminal end of mycobacterial HadBC regulates AcpM interaction during the FAS-II pathway: a structural perspective.
Febs J., 2022

PubMed Abstract: Comprehending the molecular strategies employed by Mycobacterium tuberculosis (Mtb) in FAS-II regulation is of paramount significance for curbing tuberculosis progression. Mtb employs two sets of dehydratases, namely HadAB and HadBC (β-hydroxyacyl acyl carrier protein dehydratase), for the regulation of the fatty acid synthase (FAS-II) pathway. We utilized a sequence similarity network to discern the basis for the presence of two copies of the dehydratase gene in Mtb. This analysis groups HadC and HadA in different clusters, which could be attributed to the variability in their physiological role with respect to the acyl chain uptake. Our study reveals structural details pertaining to the crystal structure of the last remaining enzyme of the FAS-II pathway. It also provides insights into the highly flexible hot-dog helix and substrate regulatory loop. Additionally, mutational studies assisted in establishing the role of the C-terminal end in HadC of HadBC in the regulation of acyl carrier protein from Mtb-mediated interactions. Complemented with surface plasmon resonance and molecular dynamics simulation studies, the present study provides the first evidence of the molecular mechanisms involved in the differential binding affinity of the acyl carrier protein from Mtb towards both mtbHadAB and mtbHadBC.

PubMed: 35175661
DOI: 10.1111/febs.16405

実験手法

X-RAY DIFFRACTION (2.899 Å)