Os02g0738400
The rice Os02g0738400 was reported as OsHk6 in 2012 [1] by researchers from Korea.
Contents
Annotated Information
Gene Symbol
- Os02g0738400 <=> OsHk6,Hk6',OHK5,HISTIDINE KINASE 5
Function
- OsHk6 was highly sensitive to isopentenyladenine (iP) and was capable of restoring cytokinin-dependent ARR6 reporter expression in the ahk2 ahk3 Arabidopsis mutant upon treatment with 1 nM iP.
- OsHk4 and OsHk6 mediated the canonical two-component signaling cascade of Arabidopsis to induce phosphorylation of ARR2.
- Ectopic expression of OsHk6 in rice calli promoted green pigmentation and subsequent shoot induc- tion, further supporting an OsHk6 in planta function as a cytokinin receptor.
- The action mechanism of OsHks is evolutionarily diverged from bacterial histidine kinases.
- OsHks are homomeric cytokinin receptors with distinctive cytokinin preferences in rice.
Expression
- OsHk4 and OsHk6 were highly expressed in spike- lets, suggesting that tZ and iP might play key roles in grain development.
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Labs working on this gene
- Department of Life Sciences and Functional Genomics Center, Pohang University of Science and Technology, Pohang 790-784,
- Korea Crop Biotech Institute, Kyung Hee University, Youngin 446-701, Korea
- Department of Plant Molecular Systems Biotechnology, Kyung Hee University, Youngin 446-701, Korea
References
- ↑ Choi J, Lee J, Kim K, Cho M, Ryu H, An G, Hwang I. Functional identification of OsHk6 as a homotypic cytokinin receptor in rice with preferential affinity for iP. Plant Cell Physiol. 2012 Jul;53(7):1334-43. doi: 10.1093/pcp/pcs079. PubMed PMID: 22642989.
