期刊
SCIENCE
卷 295, 期 5562, 页码 2073-2076出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1067554
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Plant disease resistance (R) genes trigger innate immune responses upon pathogen attack. RAR1 is an early convergence: point in a signaling pathway engaged by multiple R genes. Here, vie show that RAR1 interacts with plant orthologs of the yeast protein SGT1, an essential regulator in the cell cycle. Silencing the barley gene Sgt1 reveals its role in R gene-triggered, Rar1-dependent disease resistance. SGT1 associates with SKP1 and CUL1, subunits of the SCF (Skp1-Cullin-F-box) ubiquitin ligase complex. Furthermore, the RAR1-SGT1 complex also interacts with two COP9 signalosome components. The interactions among RAR1, SGT1, SCF, and signalosome subunits indicate a link between disease resistance and ubiquitination.
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