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JXB Advance Access published online on April 8, 2004
Journal of Experimental Botany, doi:10.1093/jxb/erh123
© 2004 by Oxford University Press
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Received August 18, 2003; accepted February 1, 2004
© 2004 Society for Experimental Biology

GENE NOTE

Molecular characterization of OsRAD21-1, a rice homologue of yeast RAD21 essential for mitotic chromosome cohesion

Liang-Ran Zhang 1, Jia-Yi Tao 1, and Tai Wang 1*

1 Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Research Center for Molecular and Developmental Biology, Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China

* To whom correspondence should be addressed. E-mail: twang{at}ns.ibcas.ac.cn.


  Abstract

Rad21/Rec8 is an important component and key regulator of cohesins. A RAD21-like gene from rice (Oryza sativa L. ssp. japonica) has been cloned and termed OsRAD21-1. OsRAD21-1 is a single-copy gene in the rice genome and is expressed in the entire plant. OsRad21-1 consists of 1055 amino acid residues and is the largest of the Rad21/Rec8 family identified to date. Based on sequence similarity comparison with other members of this family and gene expression patterns, it is concluded that OsRad21 is a rice orthologue of yeast Rad21.

Key words: Chromosome cohesin, cohesion, meiosis, mitosis, rice.


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