The Two Faces of Short-range Evolutionary Dynamics of Regulatory Modes in Bacterial Transcriptional Regulatory Networks.
From: National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA. sbalaji@ncbi.nlm.nih.gov
BioEssays : news and reviews in molecular, cellular and developmental biology
- Publish Date: Jul 2007
- ISSN: 0265-9247
- Volume: 29
- Issue: 7
- Pages: 625-9
- Medium: Print
- Language: English
- Citation (JAMA): Balaji S, Aravind L, et al. The Two Faces of Short-range Evolutionary Dynamics of Regulatory Modes in Bacterial Transcriptional Regulatory Networks.. Bioessays Jul 2007;29:625-9
Abstract
Studies on the conservation of the inferred transcriptional regulatory network of prokaryotes have suggested that specific transcription factors are less-widely conserved in comparison to their target genes. This observation implied that, at large evolutionary distances, the turnover of specific transcription factors through loss and non-orthologous displacement might be a major factor in the adaptive radiation of prokaryotes. However, the recent work of Hershberg and Margalit1 suggests that, at shorter phylogenetic scales, the evolutionary dynamics of the bacterial transcriptional regulatory network might exhibit distinct patterns. The authors find previously unnoticed relationships between the regulatory mode (activation or repression), the number of regulatory interactions and their conservation patterns in gamma-proteobacteria. These relationships might be shaped by the differences in the adaptive value and mode of operation of different regulatory interactions.
Mesh Headings (Keywords): Bacteria, Evolution, Molecular, Gene Expression Regulation, Bacterial, Gene Regulatory Networks, Models, Genetic, Transcription Factors, Transcription, Genetic
Check for Full Text / PubMed Unique Identifier (PMID): 17563073
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