Thermal Adaptation of the Archaeal and Bacterial Lipid Membranes
Author
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-15
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The physiological characteristics that distinguish archaeal and bacterial lipids, as well as those that define thermophilic lipids, are discussed from three points of view that (1) the role of the chemical stability of lipids in the heat tolerance of thermophilic organisms: (2) the relevance of the increase in the proportion of certain lipids as the growth temperature increases: (3) the lipid bilayer membrane properties that enable membranes to function at high temperatures.
It is concluded that no single, chemically stable lipid by itself was responsible for the adaptation of surviving at high temperatures.
Lipid membranes that function effectively require the two properties of a high permeability barrier and a liquid crystalline state.
Archaeal membranes realize these two properties throughout the whole biological temperature range by means of their isoprenoid chains.
Bacterial membranes meet these requirements only at or just above the phase-transition temperature, and therefore their fatty acid composition must be elaborately regulated.
A recent hypothesis sketched a scenario of the evolution of lipids in which the “lipid divide” emerged concomitantly with the differentiation of archaea and bacteria.
The two modes of thermal adaptation were established concurrently with the “lipid divide.”
American Psychological Association (APA)
Koga, Yosuke. 2012. Thermal Adaptation of the Archaeal and Bacterial Lipid Membranes. Archaea،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-498227
Modern Language Association (MLA)
Koga, Yosuke. Thermal Adaptation of the Archaeal and Bacterial Lipid Membranes. Archaea No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-498227
American Medical Association (AMA)
Koga, Yosuke. Thermal Adaptation of the Archaeal and Bacterial Lipid Membranes. Archaea. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-498227
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-498227