INVESTIGADORES
LIJAVETZKY Diego Claudio
artículos
Título:
Genome-wide comparative phylogenetic analysis of the rice and Arabidopsis Dof gene families
Autor/es:
LIJAVETZKY, D; CARBONERO, P; VICENTE-CARBAJOSA, J
Revista:
BMC Evolutionary Biology
Referencias:
Año: 2003 vol. 3 p. 1 - 11
ISSN:
1471-2148
Resumen:
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Background: Dof proteins are a family of plant-specific transcription factors that
contain a particular class of zinc-finger DNA-binding domain. Members of this
family have been found to play diverse roles in gene regulation of processes restricted
to the plants. The completed genome sequences of rice and Arabidopsis
constitute a valuable resource for comparative genomic analyses, since they are
representatives of the two major evolutionary lineages within the angiosperms.
In this framework, the identification of phylogenetic relationships among Dof
proteins in these species is a fundamental step to unravel functionality of new
and yet uncharacterised genes belonging to this group. Results: We identified 30
different Dof genes in the rice Oryza sativa genome and performed a phylogenetic analysis
of a complete collection of the 36-reported Arabidopsis thaliana and the rice Dof
transcription factors identified herein. This analysis led to a classification
into four major clusters of orthologous genes and showed gene loss and
duplication events in Arabidopsis and rice, that occurred before and after the
last common ancestor of the two species. Conclusions: According to our
analysis, the Dof gene family in angiosperms is organized in four major clusters
of orthologous genes or subfamilies. The proposed clusters of orthology and
their further analysis suggest the existence of monocot specific genes and
invite to explore their functionality in relation to the distinct physiological
characteristics of these evolutionary groups.