Envelope stress responses: balancing damage repair and toxicity

Angela M. Mitchell, Thomas J. Silhavy

Research output: Contribution to journalReview article

12 Scopus citations

Abstract

The Gram-negative envelope is a complex structure that consists of the inner membrane, the periplasm, peptidoglycan and the outer membrane, and protects the bacterial cell from the environment. Changing environmental conditions can cause damage, which triggers the envelope stress responses to maintain cellular homeostasis. In this Review, we explore the causes, both environmental and intrinsic, of envelope stress, as well as the cellular stress response pathways that counter these stresses. Furthermore, we discuss the damage to the cell that occurs when these pathways are aberrantly activated either in the absence of stress or to an excessive degree. Finally, we review the mechanisms whereby the σE response constantly acts to prevent cell death caused by highly toxic unfolded outer membrane proteins. Together, the recent work that we discuss has provided insights that emphasize the necessity for proper levels of stress response activation and the detrimental consequences that can occur in the absence of proper regulation.

Original languageEnglish (US)
Pages (from-to)417-428
Number of pages12
JournalNature Reviews Microbiology
Volume17
Issue number7
DOIs
StatePublished - Jul 1 2019

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology and Microbiology(all)
  • Infectious Diseases

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