The SCFCOl1 ubiquitin-ligase complexes are required for jasmonate response in Arabidopsis

文献类型： 外文期刊

第一作者： Xu, LH

作者： Xu, LH;Liu, FQ;Lechner, E;Genschik, P;Crosby, WL;Ma, H;Peng, W;Huang, DF;Xie, DX

作者机构： Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China;Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China; Natl Univ Singapore, Inst Mol Agrobiol, Singapore 117604, Singapore; CNRS, Inst Biol Mol Plantes, F-67084 Strasbourg, France; Natl Res Council Canada, Inst Plant Biotechnol, Saskatoon, SK S7N 0W9, Canada; Penn State Univ, Dept Biol, University Pk, PA 16802 USA; Penn State Univ, Life Sci Consortium, University Pk, PA 16802 USA

期刊名称：PLANT CELL （ 2020影响因子：11.277； 五年影响因子：12.061 ）

ISSN： 1040-4651

年卷期： 2002 年 14 卷 8 期

页码：

收录情况： SCI

摘要： Xie and colleagues previously isolated the Arabidopsis COI1 gene that is required for response to jasmonates (JAs), which regulate root growth, pollen fertility, wound healing, and defense against insects and pathogens. In this study, we demonstrate that COI1 associates physically with AtCUL1, AtRbx1, and either of the Arabidopsis Skp1-like proteins ASK1 or ASK2 to assemble ubiquitin-ligase complexes, which we have designated SCFCOI1. COI1(E22A), a single amino acid substitution in the F-box motif of COI1, abolishes the formation of the SCFCOI1 complexes and results in loss of the JA response. AtRbx1 double-stranded RNA-mediated genetic interference reduces AtRbx1 expression and affects JA-inducible gene expression. Furthermore, we show that the AtCUL1 component of SCFCOI1 complexes is modified in planta, where mutations in AXR1 decrease the abundance of the modified AtCUL1 of SCFCOI1 and lead to a reduction in JA response. Finally, we demonstrate that the axr1 and coil mutations display a synergistic genetic interaction in the double mutant. These results suggest that the COI1-mediated JA response is dependent on the SCFCOI1 complexes in Arabidopsis and that the AXR1-dependent modification of the AtCUL1 subunit of SCFCOI1 complexes is important for JA signaling.

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