Arabidopsis UBC22, an E2 able to catalyze lysine-11 specific ubiquitin linkage formation, has multiple functions in plant growth and immunity
文献类型： 外文期刊
作者： Wang, Sheng 1 ; Li, Qiang 2 ; Zhao, Liang 1 ; Fu, Sanxiong 1 ; Qin, Li 5 ; Wei, Yangdou 5 ; Fu, Yong-Bi 3 ; Wang, Hong 1 ;
作者机构： 1.Univ Saskatchewan, Dept Biochem Microbiol & Immunol, Saskatoon, SK S7N 5E5, Canada
2.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China
3.Saskatoon Res & Dev Ctr, Agr & Agri Food Canada, Plant Gene Resources Canada, Saskatoon, SK S7N 0X2, Canada
4.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China
5.Univ Saskatchewan, Dept Biol, Saskatoon, SK S7N 5E2, Canada
关键词： Protein ubiquitination; Ubiquitin-conjugating; UBC22; K11-linked; Vegetative growth; Plant immunity
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2020 年 297 卷
页码：
收录情况： SCI
摘要： Protein ubiquitination is critical for various biological processes in eukaryotes. A ubiquitin (Ub) chain can be linked through one of the seven lysine (K) residues or the N-terminus methionine of the Ub, and the Ub-conjugating enzymes called E2s play a critical role in determining the linkage specificity of Ub chains. Further, while K48-linked polyubiquitin chain is important for protein degradation, much less is known about the functions of other types of polyubiquitin chains in plants. We showed previously that UBC22 is unique in its ability to catalyze K11-dependent Ub dimer formation in vitro and ubc22 knockout mutants had defects in megasporogenesis. In this study, further analyses of the Arabidopsis ubc22 mutants revealed four subtypes of plants based on the phenotypic changes in vegetative growth. These four subtypes appeared consistently in the plants of three independent ubc22 mutants. Transcriptomic analysis showed that transcript levels of genes related to several pathways were altered differently in different subtypes of mutant plants. In one subtype, the mutant plants had increased expression of genes related to plant defenses and showed enhanced resistance to a necrotrophic plant pathogen. These results suggest multiple functions of UBC22 during plant development and stress response.
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