4XGR

Crystal structure of addiction module from Mycobacterial species

4XGR の概要

• エントリーDOI: 10.2210/pdb4xgr/pdb
• 関連するPDBエントリー: 4XGQ
• 分子名称: Ribonuclease VapC30, Antitoxin VapB30, MAGNESIUM ION, ... (4 entities in total)
• 機能のキーワード: mycobacteria, addiction module, toxin-antitoxin complex, toxin/antitoxin
• 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: 8
• 化学式量合計: 95201.51

構造登録者

Lee, B.-J.,Lee, I.-G.,Lee, S.J. (登録日: 2015-01-02, 公開日: 2015-08-12, 最終更新日: 2024-10-16)

主引用文献

Lee, I.-G.,Lee, S.J.,Chae, S.,Lee, K.Y.,Kim, J.H.,Lee, B.-J.
Structural and functional studies of the Mycobacterium tuberculosis VapBC30 toxin-antitoxin system: implications for the design of novel antimicrobial peptides
Nucleic Acids Res., 43:7624-7637, 2015

PubMed Abstract: Toxin-antitoxin (TA) systems play important roles in bacterial physiology, such as multidrug tolerance, biofilm formation, and arrest of cellular growth under stress conditions. To develop novel antimicrobial agents against tuberculosis, we focused on VapBC systems, which encompass more than half of TA systems in Mycobacterium tuberculosis. Here, we report that theMycobacterium tuberculosis VapC30 toxin regulates cellular growth through both magnesium and manganese ion-dependent ribonuclease activity and is inhibited by the cognate VapB30 antitoxin. We also determined the 2.7-Å resolution crystal structure of the M. tuberculosis VapBC30 complex, which revealed a novel process of inactivation of the VapC30 toxin via swapped blocking by the VapB30 antitoxin. Our study on M. tuberculosis VapBC30 leads us to design two kinds of VapB30 and VapC30-based novel peptides which successfully disrupt the toxin-antitoxin complex and thus activate the ribonuclease activity of the VapC30 toxin. Our discovery herein possibly paves the way to treat tuberculosis for next generation.

PubMed: 26150422
DOI: 10.1093/nar/gkv689

実験手法

X-RAY DIFFRACTION (2.7 Å)