Author:
Imhoff Johannes F.,Kushner Donn J.,Anderson Peter J.
Abstract
The amino acid composition of total proteins of eight Ectothiorhodospira strains with different salt optima and of separated membranes of selected strains have been determined. Amino acid compositions were compared with those reported for nonhalophilic phototrophic and heterotrophic bacteria and Halobacterium halobium. The membrane fractions from Ectothiorhodospira strains requiring high salt for maximum growth contained more polar and less nonpolar amino acids than strains with low salt requirements or nonhalophilic bacteria. The content of intermediate amino acids increased with the increasing halophilic properties of the Ectothiorhodospira strains. Proteins which function in high-salt environments may therefore require such compositions to maintain their structures in highly ionic solutions.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
11 articles.
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