S layer studies on three species of Methanococcus living at different temperatures
Canadian Journal of Microbiology1987Vol. 33(3), pp. 256–261
Citations Over TimeTop 14% of 1987 papers
Abstract
The cell envelopes of three species of Methanococcus with growth optima within the mesophilic, thermophilic, and extremely thermophilic temperature range were investigated. Methanococcus vannielii, Methanococcus thermolithotrophicus, and Methanococcus jannaschii possess surface layers of hexagonally arranged protein subunits. Glycosylated proteins were not found. The main surface layer proteins of the three species have different molecular weights, which can be taken as additional taxonomic markers. The amino acid composition of the main surface layer proteins shows no significant differences. The acidic amino acids exceed the basic amino acids and the nonpolar amino acids are predominant.
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