Factors behind junk DNA in bacteria.

Abstract:

:Although bacterial genomes have been traditionally viewed as being very compact, with relatively low amounts of repetitive and non-coding DNA, this view has dramatically changed in recent years. The increase of available complete bacterial genomes has revealed that many species present abundant repetitive DNA (i.e., insertion sequences, prophages or paralogous genes) and that many of these sequences are not functional but can have evolutionary consequences as concerns the adaptation to specialized host-related ecological niches. Comparative genomics analyses with close relatives that live in non-specialized environments reveal the nature and fate of this bacterial junk DNA. In addition, the number of insertion sequences and pseudogenes, as well as the size of the intergenic regions, can be used as markers of the evolutionary stage of a genome.

journal_name

Genes (Basel)

journal_title

Genes

authors

Gil R,Latorre A

doi

10.3390/genes3040634

subject

Has Abstract

pub_date

2012-10-12 00:00:00

pages

634-50

issue

4

issn

2073-4425

pii

genes3040634

journal_volume

3

pub_type

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