Os11g0199200

The rice gene Os11g0199200 was reported as OsPDIL1-1 in 2012 by researchers from China.

Annotated Information

Gene Symbol

• Os11g0199200 <=> PDIL1;1, PDIL1-1, PDIL 1-1, PDI, OsPDIL1-1

Function

• OsPDIL1-1 gene encodes a protein disulphide isomerase-like enzyme (PDIL1-1).
• PDIL1-1 appears to play an important role in starch synthesis. Its absence is associated with endoplasmic reticulum stress in the endosperm, which is likely to underlie the formation of the floury endosperm in the T3612 mutant.

Mutation

• The rice somaclonal mutant T3612 produces small grains with a floury endosperm, caused by the loose packing of starch granules.
• In T3612, its expression was abolished, resulting in a decrease in the activity of plastidial phosphorylase and pullulanase, and an increase in that of soluble starch synthase I and ADP-glucose pyrophosphorylase. The amylopectin in the T3612 endosperm showed an increase in chains with a degree of polymerization 8–13 compared with the wild type. The expression in the mutant’s endosperm of certain endoplasmic reticulum stress-responsive genes was noticeably elevated.

Expression

• In the wild type, PDIL1-1 was expressed throughout the plant, but most intensely in the developing grain.

Evolution

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Labs working on this gene

• State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, China
• National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China