Document Detail

Knockout of the VPS22 component of the ESCRT-II complex in rice (Oryza sativa L.) causes chalky endosperm and early seedling lethality.
MedLine Citation:
PMID:  23275199     Owner:  NLM     Status:  Publisher    
In both yeast and mammals, the major constituent of the endosomal sorting complex required for transport-II (ESCRT-II) is the VPS22/EAP30 protein, which plays an important role in ubiquitin-mediated degradation of membrane proteins through the multivesicular body pathway. However, the functions of ESCRT-II subunits in plants are largely unknown. In this work, we report the genetic analysis and phenotypic characterization of mutants in OsVPS22 gene, which encodes a functional VPS22 homolog in rice. On the basis of a collection of T-DNA lines, we identified a T-DNA insertion mutant, which showed abnormal segregation ratios; we then found that the T-DNA insertion is located within the sixth intron of the OsVPS22 gene. Compared with the wild type, this vps22 mutant exhibited seedling lethality and severe reduction in shoot and root growth. In addition, the vps22 mutant had a chalky endosperm in the grain. In summary, our data suggest that OsVPS22 may be required for seedling viability and grain filling in rice, thus providing a valuable resource for further exploration of the functions of the ESCRTing machinery in plants.
Xiang-Qian Zhang; Pei Hou; Hai-Tao Zhu; Guo-Dong Li; Xin-Guo Liu; Xin-Ming Xie
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-30
Journal Detail:
Title:  Molecular biology reports     Volume:  -     ISSN:  1573-4978     ISO Abbreviation:  Mol. Biol. Rep.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0403234     Medline TA:  Mol Biol Rep     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
College of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
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