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Journal article

Is the pan-genome also a pan-selectome?

By Ussery, David1,2,3; Rodriguez-Valera, Francisco4

From

Department of Systems Biology, Technical University of Denmark1

Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark2

Comparative Microbial Genomics, Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark3

Miguel Hernández University4

The comparative genomics of prokaryotes has shown the presence of conserved regions containing highly similar genes (the 'core genome') and other regions that vary in gene content (the 'flexible' regions). A significant part of the latter is involved in surface structures that are phage recognition targets.

Another sizeable part provides for differences in niche exploitation. Metagenomic data indicates that natural populations of prokaryotes are composed of assemblages of clonal lineages or "meta-clones" that share a core of genes but contain a high diversity by varying the flexible component. This meta-clonal diversity is maintained by a collection of phages that equalize the populations by preventing any individual clonal lineage from hoarding common resources.

Thus, this polyclonal assemblage and the phages preying upon them constitute natural selection units. © 2012 Rodriguez-Valera F et al.

Language: English
Publisher: F1000Research
Year: 2012
Pages: 16
ISSN: 20461402 and 1759796x
Types: Journal article
DOI: 10.12688/f1000research.1-16.v1
Keywords

Pelagibacter ubique Prochlorococcus Synechococcus article bacterial genome bacteriophage bacterium cell surface clonal variation gene targeting genetic conservation genetic selection genomics metagenomics nonhuman pan genomic pan selectome prokaryote

Other keywords

Bioinformatics Evolutionary/Comparative Genetics Genomics Medicine Microbial Evolution & Genomics Q R Science

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