Gene Details:

• MSU gene ID: LOC_Os01g59120
• RAPdb gene ID: Os01g0805600
• Gene Symbol: CycB1 1 OsCycB1 1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Furthermore, resistance to cold stress in the transgenic plants overexpressing OsCycB1;1 was also enhanced.
• We show that OsMYB3R-2 specifically bound to a mitosis-specific activator cis-element, (T/C)C(T/C)AACGG(T/C)(T/C)A, a conserved sequence that was found in promoters of cyclin genes such as OsCycB1;1 and OsKNOLLE2.
• These results suggest that OsMYB3R-2 targets OsCycB1;1 and regulates the progress of the cell cycle during chilling stress.
• Expression analysis showed that Orysa;CycB1;1 transcripts were localized in the endosperm and embryo.
• The results of the knockdown of Orysa;CycB1;1 via an endosperm or an embryo-specific promoter also suggest that the enlarged embryo may be correlated to the abortive endosperm.
• Our results suggest that Orysa;CycB1;1 expression is critical for endosperm formation via the regulation of mitotic division, and that the endosperm plays an important role in maintenance of embryo development in rice.
• The expression of Orysa;CycB1;1 is essential for endosperm formation and causes embryo enlargement in rice.
• In our current study, we show that the knockdown of Orysa;CycB1;1 in rice results in the production of abnormal seeds, which at maturity contain only an enlarged embryo.

Function-related keywords:

• cold-stress ,  mitosis ,  chilling ,  cell-cycle ,  endosperm ,  seed

Literature:

• Enhanced tolerance to chilling stress in OsMYB3R-2 transgenic rice is mediated by alteration in cell cycle and ectopic expression of stress genes .  DOI:  10.1104/pp.108.133454 ;  PMID:  19279197
• The expression of Orysa;CycB1;1 is essential for endosperm formation and causes embryo enlargement in rice .  DOI:  10.1007/s00425-009-1051-y ;  PMID:  19921249

Related News:

Gene Resources:

• NCBI ID: AK111939
• UniProt accessions:

Sequences: