TITLE

Evolution analysis of rice protein S5-ORF3

AUTHOR(S)
ZHANG Dahan; ZHANG Yi
PUB. DATE
August 2014
SOURCE
Journal of Hebei University of Science & Technology;Aug2014, Vol. 35 Issue 4, p397
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Reproductive isolation is important in speciation and maintaining species identity, so it is very significant in optimization of breeding rice. S5 locus is a cloned gene controlling the reproductive isolation, which produces proteins S5-ORF3, ORF4 and ORF5 that work together to regulate fertility in indica-japonica hybrids, and especially the S5-ORF3 protein plays a very important role in distorting reproductive isolation among indica-japonica and enhancing gene flow among populations. The evolutionary analysis of S5-ORF3 is significant for studying its function and origin, which is still no reported. In this paper, based on sequence and evolution analysis, it is proposed that the S5-ORF3 is a new HSP70 family protein which is located in endoplasmic reticulum (ER) and lacks of multi-pep tide binding domain. Evolution analysis suggests that S5-ORF3 might act on ER stress via affecting alpha-amylase synthesis; moreover, 19 homologous proteins of S5-ORF3 are found, ML phylogenetic tree is constructed, and it is found that there is close evolution relationship between rice S5-ORF3 and a luminal-binding protein of Ae-gilops tauschii; the 3D structure of S5-ORF3 with confidence of 100% is predicted, as well as a ligand-binding site located in the middle of S5-ORF3. The specific motif of rice S5-ORF3 among HSP70 family is also found. This work may provide some clues and data for studying function and evolution history of rice S5-ORF3.
ACCESSION #
97927441

 

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