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First insight into the genome of an uncultivated crenarchaeote from soil.

Quaiser, Achim and Ochsenreiter, Torsten and Klenk, Hans-Peter and Kletzin, Arnulf and Treusch, Alexander H. and Meurer, Guido and Eck, Jürgen and Sensen, Christoph W. and Schleper, Christa (2002):
First insight into the genome of an uncultivated crenarchaeote from soil.
In: Environmental microbiology, pp. 603-11, 4, (10), ISSN 1462-2912,
[Article]

Abstract

Molecular phylogenetic surveys based on the characterization of 16S rRNA genes have revealed that soil is an environment particularly rich in microbial diversity. A clade of crenarchaeota (archaea) has frequently been detected among many other novel lineages of uncultivated bacteria. In this study we have initiated a genomic approach for the characterization of uncultivated microorganisms from soil. We have developed a procedure based on a two-phase electrophoresis technique that allows the fast and reliable purification of concentrated and clonable, high molecular weight DNA. From this DNA we have constructed complex large-insert genomic libraries. Using archaea-specific 16S rRNA probes we have isolated a 34 kbp fragment from a 900 Mbp fosmid library of soil DNA. The clone contained a complete 16S/23S rRNA operon and 17 genes encoding putative proteins. Phylogenetic analyses of the rRNA genes and of several protein encoding genes (e.g. DNA polymerase, FixAB, glycosyl transferase) confirmed the specific affiliation of the genomic fragment with the non-thermophilic clade of the crenarchaeota. Content and structure of the genomic fragment indicated that the archaea from soil differ significantly from their previously studied uncultivated marine relatives. The protein encoding genes gave the first insights into the physiological potential of these organisms and can serve as a basis for future genomic and functional genomic studies.

Item Type: Article
Erschienen: 2002
Creators: Quaiser, Achim and Ochsenreiter, Torsten and Klenk, Hans-Peter and Kletzin, Arnulf and Treusch, Alexander H. and Meurer, Guido and Eck, Jürgen and Sensen, Christoph W. and Schleper, Christa
Title: First insight into the genome of an uncultivated crenarchaeote from soil.
Language: English
Abstract:

Molecular phylogenetic surveys based on the characterization of 16S rRNA genes have revealed that soil is an environment particularly rich in microbial diversity. A clade of crenarchaeota (archaea) has frequently been detected among many other novel lineages of uncultivated bacteria. In this study we have initiated a genomic approach for the characterization of uncultivated microorganisms from soil. We have developed a procedure based on a two-phase electrophoresis technique that allows the fast and reliable purification of concentrated and clonable, high molecular weight DNA. From this DNA we have constructed complex large-insert genomic libraries. Using archaea-specific 16S rRNA probes we have isolated a 34 kbp fragment from a 900 Mbp fosmid library of soil DNA. The clone contained a complete 16S/23S rRNA operon and 17 genes encoding putative proteins. Phylogenetic analyses of the rRNA genes and of several protein encoding genes (e.g. DNA polymerase, FixAB, glycosyl transferase) confirmed the specific affiliation of the genomic fragment with the non-thermophilic clade of the crenarchaeota. Content and structure of the genomic fragment indicated that the archaea from soil differ significantly from their previously studied uncultivated marine relatives. The protein encoding genes gave the first insights into the physiological potential of these organisms and can serve as a basis for future genomic and functional genomic studies.

Journal or Publication Title: Environmental microbiology
Volume: 4
Number: 10
Divisions: 10 Department of Biology > Sulfur Biochemistry and Microbial Bioenergetics
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10 Department of Biology
Date Deposited: 24 May 2011 08:04
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