GTPase activity-coupled treadmilling of the bacterial tubulin FtsZ organizes septal cell wall synthesis

Xinxing Yang, Zhixin Lyu, Amanda Miguel, Ryan McQuillen, Kerwyn Casey Huang, Jie Xiao

Research output: Contribution to journalArticle

Abstract

The bacterial tubulin FtsZ is the central component of the cell division machinery, coordinating an ensemble of proteins involved in septal cell wall synthesis to ensure successful constriction. How cells achieve this coordination is unknown. We found that in Escherichia coli cells, FtsZ exhibits dynamic treadmilling predominantly determined by its guanosine triphosphatase activity. The treadmilling dynamics direct the processive movement of the septal cell wall synthesis machinery but do not limit the rate of septal synthesis. In FtsZ mutants with severely reduced treadmilling, the spatial distribution of septal synthesis and the molecular composition and ultrastructure of the septal cell wall were substantially altered.Thus, FtsZ treadmilling provides a mechanism for achieving uniform septal cell wall synthesis to enable correct polar morphology.

Original languageEnglish (US)
Pages (from-to)744-747
Number of pages4
JournalScience
Volume355
Issue number6326
DOIs
StatePublished - Feb 17 2017

ASJC Scopus subject areas

  • Medicine(all)
  • General

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