Os01g0338000
The rice Os01g0338000 was reported as OsSar1 in 2014 [1] by researchers from China.
Contents
Annotated Information
Figure 2. Subcellular localization of Sar1 in rice protoplasts.[1].
Function
- Sar1, a small GTPase, acts as a molecular switch to regulate the assembly of coat protein complex II, which exports secretory protein from the ER to the Golgi apparatus.
- There are four putative Sar1 genes (OsSar1a, OsSar1b, OsSar1c, OsSar1d) in rice.
- OsSar1a/b/c play a crucial role in storage proteins exiting from the ER, with functional redundancy in rice endosperm, and glutelin and α-globulin transported together from the ER to the Golgi apparatus by a pathway mediated by coat protein complex II.
Subcellular localization
- OsSar1 was fused with mCherry (OsSar1–mCherry) and co-expressed with yellow fluorescent protein (YFP)–AtSec24, which labels ERES 2009), in rice protoplast cells. The punctate structures labelled with OsSar1–mCherry coincided with YFP–AtSec24 fluorescence (Fig. 2B), and the distribution pattern of the four Sar1 proteins was similar.
- These data indicated that the OsSar1 isoforms were distributed at ERES, at the ER, and in the cytosol.
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Labs working on this gene
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China
- Faculty of Agriculture, Kyushu University, Fukuoka 812–8581, Japan
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Labs working on this gene
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References
- ↑ 1.0 1.1 Tian L, Dai LL, Yin ZJ, Fukuda M, Kumamaru T, Dong XB, Xu XP, Qu le Q. Small GTPase Sar1 is crucial for proglutelin and α-globulin export from the endoplasmic reticulum in rice endosperm. J Exp Bot. 2013 Jul;64(10):2831-45. doi: 10.1093/jxb/ert128. Epub 2013 May 16. PubMed PMID: 23682119; PubMed Central PMCID: PMC3697955.
