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Título: | A close relationship between primary nucleotides sequence structure and the composition of functional genes in the genome of prokaryotes |
Autor: | García, Juan A. L.; Fernàndez-Guerra, Antoni CSIC ORCID; Casamayor, Emilio O. CSIC ORCID | Palabras clave: | DNA walk Detrended fluctuation analysis (DFA) Microbial ecology Long-range correlation Comparative genome analysis Large-scale genome structure |
Fecha de publicación: | 2011 | Editor: | Elsevier | Citación: | Molecular Phylogenetics and Evolution 61(3) : 650-658 (2011) | Resumen: | Comparative genomics is an essential tool to unravel how genomes change over evolutionary time and to gain clues on the links between functional genomics and evolution. In prokaryotes, the large, good quality, genome sequences available in public databases and the recently developed large-scale computational methods, offer an unprecedent view on the ecology and evolution of microorganisms through comparative genomics. In this work, we examined the links among genome structure (i.e., the sequential distribution of nucleotides itself by detrended fluctuation analysis, DFA) and genomic diversity (i.e., gene functionality by Clusters of Orthologous Genes, COGs) in 828 full sequenced prokaryotic genomes from 548 different bacteria and archaea species. DFA scaling exponent a indicated persistent long-range correlations (fractality) in each genome analyzed. Higher resolution power was found when considering the sequential succession of purine (AG) vs. pyrimidine (CT) bases than either keto (GT) to amino (AC) forms or strongly (GC) vs. weakly (AT) bonded nucleotides. Interestingly, the phyla Aquificae, Fusobacteria, Dictyoglomi, Nitrospirae, and Thermotogae were closer to archaea than to their bacterial counterparts. A strong significant correlation was found between scaling exponent a and COGs distribution, and we consistently observed that the larger a the more heterogeneous was the gene distribution within each functional category, suggesting a close relationship between primary nucleotides sequence structure and functional genes composition | Descripción: | 9 páginas, 6 figuras, 4 tablas. | Versión del editor: | http://dx.doi.org/10.1016/j.ympev.2011.08.011 | URI: | http://hdl.handle.net/10261/47066 | DOI: | 10.1016/j.ympev.2011.08.011 | ISSN: | 1055-7903 | E-ISSN: | 1095-9513 |
Aparece en las colecciones: | (CEAB) Artículos |
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