2005
DOI: 10.1038/sj.embor.7400538
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Environments shape the nucleotide composition of genomes

Abstract: To test the impact of environments on genome evolution, we analysed the relative abundance of the nucleotides guanine and cytosine ('GC content') of large numbers of sequences from four distinct environmental samples (ocean surface water, farm soil, an acidophilic mine drainage biofilm and deep-sea whale carcasses). We show that the GC content of complex microbial communities seems to be globally and actively influenced by the environment. The observed nucleotide compositions cannot be easily explained by dist… Show more

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Cited by 276 publications
(260 citation statements)
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“…This view was bolstered by sequence information showing that the base compositional differences among bacteria were most pronounced at synonymous and noncoding positions, sites that are thought to be under the least selective constraints (5). Furthermore, repeated attempts to link genomic base composition with an environmental factor or other selective processes have met with limited success (6)(7)(8)(9)(10).…”
mentioning
confidence: 99%
“…This view was bolstered by sequence information showing that the base compositional differences among bacteria were most pronounced at synonymous and noncoding positions, sites that are thought to be under the least selective constraints (5). Furthermore, repeated attempts to link genomic base composition with an environmental factor or other selective processes have met with limited success (6)(7)(8)(9)(10).…”
mentioning
confidence: 99%
“…Comparative metagenomics approaches have revealed significant variation in sequence composition (3), genome size (4), evolutionary rates (5), and metabolic capabilities (6)(7)(8) among qualitatively dissimilar environments (e.g., terrestrial vs. marine), providing evidence for genomic adaptations. Further, variation in specific community biological processes have been shown for different water column zones at a single geographic site (9), different climatic regions in the ocean (10), and, more recently, among 9 ecosystems (7).…”
mentioning
confidence: 99%
“…Total of SNP from Pun1 gene found was 22 bp consisted of 10 bp in the exon-1 fragment, 6 bp in intron fragment, and 6 bp in the exon-2 fragment (Table 2). External factors such as light, water, soil, and pH could be the reason for nucleotide substitutions [13]. Protein structures analysis shows that the composition of secondary structure between this gene and references gene was slightly different (Table 3), likewise both protein structure (Fig.…”
Section: Resultsmentioning
confidence: 95%