Os09g0506800

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The rice gene Os09g0506800 was reported as Pair2 in 2004[1] by researchers from Japan.

Annotated Information

Gene Symbol

  • Os09g0506800 <=> Pair2, OsASY1

Function

  • PAIR2 gene is essential for homologous chromosome pairing in meiosis, as in the case of the genes ASY1 and HOP1.
  • The researchers suggested the possibility that a highly homologous copy of the PAIR2 gene located on a different chromosome is in fact a pseudogene.

Mutation

  • To elucidate the genetic system that establishes homologous chromosome pairing in monocot plants, the researchers have isolated an asynaptic mutant of rice, designated pair2 (homologous pairing aberration in rice meiosis 2), in which 24 completely unpaired univalents are observed at pachytene and diakinesis.

Expression

  • Mature PAIR2 mRNA and several splicing variants were found to be highly expressed in wild-type reproductive tissues, and lower expression was also detected in vegetative tissues.
  • In situ hybridization and BrdU incorporation experiments revealed that PAIR2 expression is specifically enhanced in male and female meiocytes, but not in those at pre-meiotic S phase or in the pollen maturation stages.

Evolution

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Labs working on this gene

  • Experimental Farm and Plant Genetics Laboratory, National Institute of Genetics, Yata 1111, 411-8540 Mishima, Shizuoka, Japan
  • Biotechnology Section, Agricultural Experiment Station, Toyama Agricultural Research Center, Yoshioka 1124-1, 939-8153 Toyama, Japan
  • Department of Molecular Genetics, National Institute of Agrobiological Sciences, 305-8602 Tsukuba, Ibaraki, Japan

References

  1. Nonomura KI, Nakano M, Murata K, Miyoshi K, Eiguchi M, Miyao A, Hirochika H, Kurata N. An insertional mutation in the rice PAIR2 gene, the ortholog of Arabidopsis ASY1, results in a defect in homologous chromosome pairing during meiosis. Mol Genet Genomics. 2004 Mar;271(2):121-9. PubMed PMID: 14758540.


Structured Information