A phylogenomic study of endosymbiotic bacteria

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A phylogenomic study of endosymbiotic bacteria. / Canbäck, Björn; Tamas, I; Andersson, S G E.

In: Molecular biology and evolution, Vol. 21, No. 6, 2004, p. 1110-1122.

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Canbäck, B, Tamas, I & Andersson, SGE 2004, 'A phylogenomic study of endosymbiotic bacteria', Molecular biology and evolution, vol. 21, no. 6, pp. 1110-1122. https://doi.org/10.1093/molbev/msh122

APA

Canbäck, B., Tamas, I., & Andersson, S. G. E. (2004). A phylogenomic study of endosymbiotic bacteria. Molecular biology and evolution, 21(6), 1110-1122. https://doi.org/10.1093/molbev/msh122

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Canbäck, Björn ; Tamas, I ; Andersson, S G E. / A phylogenomic study of endosymbiotic bacteria. In: Molecular biology and evolution. 2004 ; Vol. 21, No. 6. pp. 1110-1122.

RIS

TY - JOUR

T1 - A phylogenomic study of endosymbiotic bacteria

AU - Canbäck, Björn

AU - Tamas, I

AU - Andersson, S G E

PY - 2004

Y1 - 2004

N2 - Endosymbiotic bacteria of aphids, Buchnera aphidicola, and tsetse flies, Wigglesworthia glossinidia, are descendents of free-living gamma-Proteobacteria. The acceleration of sequence evolution in the endosymbiont genomes is here estimated from a phylogenomic analysis of the gamma-Proteobacteria. The tree topologies associated with the most highly conserved genes suggest that the endosymbionts form a sister group with Escherichia coli, Salmonella sp., and Yersinia pestis. Our results indicate that deviant tree topologies result from high substitution rates and biased nucleotide patterns, rather than from lateral gene transfer, as previously suggested. A reinvestigation of the relative rate increase in the endosymbiont genomes reveals variability among genes that correlate with host-associated metabolic dependencies. The conclusion is that host-level selection has retarded both the loss of genes and the acceleration of sequence evolution in endocellular symbionts.

AB - Endosymbiotic bacteria of aphids, Buchnera aphidicola, and tsetse flies, Wigglesworthia glossinidia, are descendents of free-living gamma-Proteobacteria. The acceleration of sequence evolution in the endosymbiont genomes is here estimated from a phylogenomic analysis of the gamma-Proteobacteria. The tree topologies associated with the most highly conserved genes suggest that the endosymbionts form a sister group with Escherichia coli, Salmonella sp., and Yersinia pestis. Our results indicate that deviant tree topologies result from high substitution rates and biased nucleotide patterns, rather than from lateral gene transfer, as previously suggested. A reinvestigation of the relative rate increase in the endosymbiont genomes reveals variability among genes that correlate with host-associated metabolic dependencies. The conclusion is that host-level selection has retarded both the loss of genes and the acceleration of sequence evolution in endocellular symbionts.

U2 - 10.1093/molbev/msh122

DO - 10.1093/molbev/msh122

M3 - Article

VL - 21

SP - 1110

EP - 1122

JO - Molecular biology and evolution

JF - Molecular biology and evolution

SN - 0737-4038

IS - 6

ER -