GrainGenes Reference Report: TAG-99-203
Reference
TAG-99-203
Title
Phylogenetic classification and molecular evolution of knotted1 homeobox genes.
Journal
Theoretical and Applied Genetics
Year
1999
Volume
99
Pages
203-209
Author
Deshpande AD Ramakrishna W Mulay GP Gupta VS Ranjekar PK
Abstract
Homeobox genes encode a family of DNA-binding regulatory proteins which are crucial for development. The first plant homeobox gene identified was knotted1 which plays a major role in leaf development. The knotted1 gene has a homeobox which encodes a homeodomain (HD) and HD proteins have been shown to function as transcription factors. A phylogenetic classification of the KNOTTED1 HD is presented. Here, we report six kn1 HDs from the cereals oat, barley, wheat, rye and rice. The KN1 class-I and -II genes can be divided into two distinct clades. Further, we hypothesize that KN1 and BELL1/MEIS HDs, (the closest non-KN1 class HDs) evolved from a common ancestor after divergence from the common precursor of all the homeobox genes. Our analysis clearly shows the presence of an ancestral KN1 HD from which all the known plant kn1 class of genes evolved.
External Databases
http://link.springer-ny.com/link/service/journals/00122/bibs/9099001/90990203.htm
Keyword
aegilops longissima
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: TAG-99-203
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||