Molecular identification and interaction assay of the gene (OsUbc13) encoding a ubiquitin-conjugating enzyme in rice
文献类型: 外文期刊
第一作者: Wang, Ya
作者: Wang, Ya;Xu, Meng-yun;Liu, Jian-ping;Wang, Mu-gui;Tu, Ju-min;Wang, Ya;Yin, Hai-qing
作者机构:
关键词: Ubc13;DNA damage tolerance;Oryza sativa;Real-time quantitative PCR;Yeast two-hybrid
期刊名称:JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B ( 影响因子:3.066; 五年影响因子:3.057 )
ISSN: 1673-1581
年卷期: 2014 年 15 卷 7 期
页码:
收录情况: SCI
摘要: The ubiquitin (Ub)-conjugating enzyme, Ubc13, has been known to be involved in error-free DNA damage tolerance (or post-replication repair) via catalyzing Lys63-linked polyubiquitin chains formation together with a Ubc variant. However, its functions remain largely unknown in plant species, especially in monocotyledons. In this study, we cloned a Ub-conjugating enzyme, OsUbc13, that shares the conserved domain of Ubc with AtUBC13B in Oryza sativa L., which encodes a protein of 153 amino acids; the deduced sequence shares high similarities with other homologs. Real-time quantitative polymerase chain reaction (PCR) indicated that OsUbc13 transcripts could be detected in all tissues examined, and the expression level was higher in palea, pistil, stamen, and leaf, and lower in root, stem, and lemma; the expression of OsUbc13 was induced by low temperature, methylmethane sulfate (MMS), and H2O2, but repressed by mannitol, abscisic acid (ABA), and NaCl. OsUbc13 was probably localized in the plasma and nuclear membranes. About 20 proteins, which are responsible for the positive yeast two-hybrid interaction of OsUbc13, were identified. These include the confirmed OsVDAC (correlated with apoptosis), OsMADS1 (important for development of floral organs), OsB22EL8 (related to reactive oxygen species (ROS) scavenging and DNA protection), and OsCROC-1 (required for formation of Lys63 polyubiquitylation and error-free DNA damage tolerance). The molecular characterization provides a foundation for the functional study of OsUbc13.
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