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A Delicate Connection: c-di-AMP Affects Cell Integrity by Controlling Osmolyte Transport
Fabian M Commichau1, Johannes Gibhardt1, Sven Halbedel2
1Department of General Microbiology, University of Göttingen, Grisebachstrasse 8, 37077 Göttingen, Germany.
Trends in Microbiology
|October 3, 2017
Summary
Cyclic di-AMP (c-di-AMP) is crucial for Gram-positive bacteria. This paper proposes c-di-AMP indirectly maintains cell envelope integrity by regulating turgor, challenging previous assumptions about its direct role in synthesis.
Area of Science:
- Bacteriology
- Molecular Biology
- Cell Biology
Background:
- Bacteria utilize second-messenger molecules for environmental adaptation.
- Cyclic di-AMP (c-di-AMP) is an essential second messenger for Gram-positive bacteria growth.
- Perturbations in c-di-AMP metabolism are linked to bacterial cell envelope defects.
Purpose of the Study:
- To propose an alternative interpretation of cell envelope phenotypes observed in bacteria with altered c-di-AMP metabolism.
- To investigate the potential indirect role of c-di-AMP in maintaining cell envelope integrity via turgor regulation.
- To highlight key unanswered questions in c-di-AMP metabolism for future research.
Main Methods:
- This is an Opinion paper, presenting a theoretical framework and interpretation of existing data.
- Discussion and synthesis of published research on c-di-AMP metabolism and cell envelope integrity.
- Identification of knowledge gaps and future research directions.
Main Results:
- The study posits that c-di-AMP may not directly synthesize the cell envelope.
- Instead, c-di-AMP is proposed to indirectly influence cell envelope integrity by modulating turgor pressure.
- This reinterpretation offers a new perspective on the function of c-di-AMP in bacterial physiology.
Conclusions:
- The direct role of c-di-AMP in cell envelope synthesis is questioned.
- c-di-AMP's primary role in cell envelope integrity might be through the indirect regulation of turgor.
- Further research is needed to elucidate the precise mechanisms of c-di-AMP in bacterial cell biology.
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