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Two novel protein kinase genes,OsMSRPK1 andOsMSURPK2, are regulated by diverse environmental stresses in rice |
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| Authors: | Mi-Ok Lee Pil-Gyu Choi Jung-A Kim Young-Ho Jung Seung-Hee Jung So Hee Kim Jin-Won Kim Sang-Kyu Lee Jong-Seong Jeon Rakwal Randeep Ganesh Kumar Agrawal Nam-Soo Jwa |
| Affiliation: | 1. Department of Molecular Biology, College of Natural Science, Sejong University, 143-747, Seoul, Korea 2. Department of Environmental Horticulture, University of Seoul, 130-743, Seoul, Korea 3. Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, 449-701, Yongin, Korea 4. Human Stress Signal Research Center, National Institute of Advanced Industrial Science and Technology, 305-8566, Ibaraki, Japan 5. Research Laboratory for Agricultural Biotechnology and Biochemistry, GPO Box 8207, Kathmandu, Nepal |
| Abstract: | Two novel rice (Oryza sativa L.) protein kinase (PK) genes have been isolated.OsMSRPK1 andOsMSURPK2, which most likely exist as single-copy genes in the rice genome, encode 693 and S03 amino acids polypeptide, respectively, and have the serine/threonine kinase domain of cyclin dependent protein kinase (OsMSRPK1), or the serine/threonine kinase domain and NAF domain (OsMSURPK2). Steady-state mRNA analyses of these PKs, with constitutive expression in the leaves of two-week-old seedlings, revealed thatOsMSRPK1 is up-regulated upon exposure to environmental stresses, whereasOsMSVRPK2 is down-regulated by these same stresses. Furthermore, the two PKs are developmentally regulated in both young and mature rice plants, including in the panicles. These results strongly suggest that the genes have roles in both plant development and in their defense/stress-signaling pathways. |
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