Mechanosensitive Channels and Sensing Osmotic Stimuli in Bacteria

2008 ◽  
pp. 25-45 ◽  
Author(s):  
Paul Blount ◽  
Irene Iscla ◽  
Yuezhou Li
Keyword(s):  
Mechanosensitive Channels ◽  
Osmotic Stimuli

scholarly journals Investigations on the Reactions of Infusoria to Chemical and Osmotic Stimuli

1906 ◽  
Vol 1 (2) ◽  
pp. 185-202
Author(s):  
T. Brailsford Robertson
Keyword(s):  
Osmotic Stimuli

scholarly journals With an Ear up Against the Wall: An Update on Mechanoperception in Arabidopsis.

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1587
Author(s):  
Sara Behnami ◽  
Dario Bonetta
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Immune Responses ◽  
Mechanical Stress ◽  
Mechanosensitive Channels ◽  
Compensatory Responses ◽  
Cell Wall Damage ◽  
Mechanical Signals ◽  
Hormone Signalling

Cells interpret mechanical signals and adjust their physiology or development appropriately. In plants, the interface with the outside world is the cell wall, a structure that forms a continuum with the plasma membrane and the cytoskeleton. Mechanical stress from cell wall damage or deformation is interpreted to elicit compensatory responses, hormone signalling, or immune responses. Our understanding of how this is achieved is still evolving; however, we can refer to examples from animals and yeast where more of the details have been worked out. Here, we provide an update on this changing story with a focus on candidate mechanosensitive channels and plasma membrane-localized receptors.

Effects of osmotic stimuli on vasopressin levels in the CSF of rats

Peptides ◽  
1988 ◽  
Vol 9 ◽  
pp. 109-111 ◽  
Author(s):  
Jukka Jolkkonen ◽  
Leena Tuomisto ◽  
Tjeerd B. Van Wimersma Greidanus ◽  
Esa Läärä ◽  
Paavo Riekkinen
Keyword(s):  
Osmotic Stimuli

scholarly journals Responses of Bacillus subtilis to Hypotonic Challenges: Physiological Contributions of Mechanosensitive Channels to Cellular Survival

2008 ◽  
Vol 74 (8) ◽  
pp. 2454-2460 ◽  
Author(s):  
Tamara Hoffmann ◽  
Clara Boiangiu ◽  
Susanne Moses ◽  
Erhard Bremer
Keyword(s):  
Bacillus Subtilis ◽  
Mutational Analysis ◽  
Mechanosensitive Channels ◽  
High Osmolarity ◽  
Cellular Survival ◽  
Genes Encoding ◽  
Quadruple Mutant ◽  
Rapid Transition ◽  
A Minor ◽  
Small Conductance

ABSTRACT Mechanosensitive channels are thought to function as safety valves for the release of cytoplasmic solutes from cells that have to manage a rapid transition from high- to low-osmolarity environments. Subsequent to an osmotic down-shock of cells grown at high osmolarity, Bacillus subtilis rapidly releases the previously accumulated compatible solute glycine betaine in accordance with the degree of the osmotic downshift. Database searches suggest that B. subtilis possesses one copy of a gene for a mechanosensitive channel of large conductance (mscL) and three copies of genes encoding proteins that putatively form mechanosensitive channels of small conductance (yhdY, yfkC, and ykuT). Detailed mutational analysis of all potential channel-forming genes revealed that a quadruple mutant (mscL yhdY yfkC ykuT) has no growth disadvantage in high-osmolarity media in comparison to the wild type. Osmotic down-shock experiments demonstrated that the MscL channel is the principal solute release system of B. subtilis, and strains with a gene disruption in mscL exhibited a severe survival defect upon an osmotic down-shock. We also detected a minor contribution of the SigB-controlled putative MscS-type channel-forming protein YkuT to cellular survival in an mscL mutant. Taken together, our data revealed that mechanosensitive channels of both the MscL and MscS types play pivotal roles in managing the transition of B. subtilis from hyper- to hypo-osmotic environments.

Release of vasoactive intestinal peptide (VIP) by intraluminal osmotic stimuli

1977 ◽  
Vol 23 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Amin M. Ebeid ◽  
Peter B. Soeters ◽  
Phillip Murray ◽  
Josef E. Fischer
Keyword(s):  
Vasoactive Intestinal Peptide ◽  
Osmotic Stimuli
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