A cytoplasmic helix is required for pentamer formation of the Escherichia coli MscL mechanosensitive channel

Chie Ando, Naili Liu, Kenjiro Yoshimura

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Many membrane proteins such as ion channels are oligomers, but the determinants of the degree of oligomerization are not fully understood. Mechanosensitive channel with large conductance (MscL), which is ubiquitous in bacteria, is a homopentamer with two transmembrane helices and a cytoplasmic helix in each subunit. The carboxyl-terminal cytoplasmic helices assemble into a pentameric bundle that resembles cartilage oligomeric matrix protein. To address the role of cytoplasmic helices in the pentamer formation of Escherichia coli MscL, we generated MscL constructs with various deletions at the carboxyl terminus and translated them in a cell-free system. Deletions of Leu-129 and the downstream sequence resulted in formation of various oligomers without preference to pentamers, suggesting that nearly the whole cytoplasmic helix is required for MscL pentamer formation.

本文言語English
論文番号07179193
ページ(範囲)109-114
ページ数6
ジャーナルJournal of biochemistry
158
2
DOI
出版ステータスPublished - 2014 12 16

ASJC Scopus subject areas

  • 生化学
  • 分子生物学

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