Article (Scientific journals)
Primary Structure of Selected Archaeal Mesophilic and Extremely Thermophilic Outer Surface Layer Proteins
Claus, Harald; Akça, Erol; Debaerdemaeker, Tony et al.
2002In Systematic and Applied Microbiology, 25, p. 3-12
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Keywords :
Archaea; cell walls; S-layer; (glyco-)proteins; protein structure
Abstract :
[en] The archaea are recognized as a separate third domain of life together with the bacteria and eucarya. The archaea include the methanogens, extreme halophiles, thermoplasmas, sulfate reducers and sulfur metabolizing thermophiles, which thrive in different habitats such as anaerobic niches, salt lakes, and marine hydrothermals systems and continental solfataras. Many of these habitats represent extreme environments in respect to temperature, osmotic pressure and pH-values and remind on the conditions of the early earth. The cell envelope structures were one of the first biochemical characteristics of archaea studied in detail. The most common archaeal cell envelope is composed of a single crystalline protein or glycoprotein surface layer (S-layer), which is associated with the outside of the cytoplasmic membrane. The S-layers are directly exposed to the extreme environment and can not be stabilized by cellular components. Therefore, from comparative studies of mesophilic and extremely thermophilic S-layer proteins hints can be obtained about the molecular mechanisms of protein stabilization at high temperatures. First crystallization experiments of surface layer proteins under microgravity conditions were successful. Here, we report on the biochemical features of selected mesophilic and extremely archaeal S-layer (glyco-) proteins.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Claus, Harald;  Johannes Gutenberg-Universität - Mainz
Akça, Erol;  Johannes Gutenberg-Universität - Mainz
Debaerdemaeker, Tony;  Universität Ulm
Evrard, Christine ;  Université Catholique de Louvain - UCL > Département de Chimie > Laboratoire de Chimie et de Cristallographie
Declercq, Jean-Paul;  Université Catholique de Louvain - UCL > Département de Chimie > Laboratoire de Chimie et de Cristallographie
König, Helmut;  Johannes Gutenberg-Universität - Mainz
Language :
English
Title :
Primary Structure of Selected Archaeal Mesophilic and Extremely Thermophilic Outer Surface Layer Proteins
Publication date :
2002
Journal title :
Systematic and Applied Microbiology
ISSN :
0723-2020
eISSN :
1618-0984
Publisher :
Elsevier GmbH, Urban & Fischer Verlag, Jena, Germany
Volume :
25
Pages :
3-12
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 May 2010

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