Archives of Microbiology

, Volume 194, Issue 7, pp 637–641 | Cite as

The inner membrane protein, YhiM, is necessary for Escherichia coli (E. coli) survival in acidic conditions

  • Tuan M. Nguyen
  • Rebecca L. Sparks-ThissenEmail author
Short Communication


Escherichia coli must be able to survive extreme acidic conditions. We were interested in determining the role of the inner membrane protein YhiM in survival in acidic conditions. Previous data demonstrated that the yhiM gene was upregulated in acidic conditions (Tucker et al. in J Bacteriol. 184:6551–6558, 2002). We therefore tested tn10 insertions into the yhiM gene for their ability to survive at low pH (pH 2.5). We show that YhiM was required for survival at pH 2.5. We also tested the YhiM dependence of the different acid resistance pathways. YhiM was required for the RpoS, glutamine and lysine–dependent acid resistance pathways. In contrast, YhiM was not required for the arginine-dependent acid resistance pathway.


E. coli Acid resistance Inner membrane protein Acid stress 


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Department of BiologyWabash CollegeCrawfordsvilleUSA

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