Os04g0531100

The rice Os04g0531100 was reported as OsPBP1 in 2008 by researchers from the China.

Annotated Information

Gene Symbol

• Os04g0531100 <=> OsPBP1

Function

• OsPBP1 is a novel functional C2-domain phospholipids-binding protein that is required for pollen fertility likely by regulating Ca21 and phospholipid signaling pathways.
• OsPBP1 is a single copy gene and preferentially expressed in pistil and pollen but downregulated by pollination.
• OsPBP1 had a calcium concentration-dependent phospholipid-binding activity and was localized mainly in cytoplasm and nucleus, but translocated onto the plasma membrane in response to an intracellular Ca21 increase.
• OsPBP1 protein was localized in a region peripheral to pollen wall and vesicles of elongating pollen tube, and its repressed expression reduced substantially this association and led to alteration of microfilament polymerization during pollen germination.

Mutant

• Pollen grains of antisense OsPBP1 transgenic lines were largely nonviable, germinated poorly in vitro and of low fertility

Labs working on this gene

• Institute of Genetics and Developmental Biology, Chinese Academy of Sciences and National Centre for Plant Gene Research, Beijing 100190, China
• Graduate School of Chinese Academy of Sciences, Beijing 100049, China