Os02g0120800

The rice Os02g0120800 was reported as OsRacB in 2006 by researchers from Korea.

Annotated Information

Gene Symbol

• Os02g0120800 <=> OsRacB,RacB

Function

• OsRacB functions as a potential regulator for a basal disease resistance pathway in rice.

Phenotypic analysis

• Transgenic rice plants over-expressing OsRacB showed increased symptom development in response to rice blast pathogens.
• Additionally, fluorescence microscopy of green fluorescent protein (GFP):OsRacB-transformed onion cells and Arabidopsis proto-plasts revealed OsRacB association with plasma membrane (PM), suggesting that PM localization is required for proper function of OsRacB.

Expression

• Its mRNA was strongly expressed in leaf sheath (LS) and in panicles, but was very weakly expressed in young and mature leaves.
• The basal mRNA level of OsRacB in LS of two-week-old seedlings was strongly down-regulated upon wounding by cut and treatment with jasmonic acid.
• A dramatic down-regulation in the OsRacB transcripts was also found in plants inoculated with the blast pathogen, Magna-porthe grisea.

Evolution

• OsRacB is a single copy gene in the genome of rice, shared 98% identity with HvRacB at the amino acid level.

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Labs working on this gene

• Department of Molecular Biology, College of Natural Science, Sejong University, Seoul 143-747, Korea
• Research Laboratory for Agricultural Biotechnology and Biochemistry (RLABB), GPO Box 8207, Kathmandu, Nepal
• Human Stress Signal Research Center (HSS), National Institute of Advanced Industrial Science and Technology (AIST),
• Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
• School of Life Sciences and Biotechnology, Korea University, Anam-dong, Sungbuk-gu, Seoul 136-701, Korea
• Plant Virus GenBank, Division of Environmental and Life Sciences, Seoul Women’s University, Seoul 139-774, Korea
• Research Institute of Agricultural Resources, Ishikawa Agricultural College, Suematu, Nonoichi, Ishikawa 921-8836, Japan