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논문 기본 정보

자료유형
학술저널
저자정보
Jeong Yu Jeong (Seoul National University)
저널정보
한국식물생명공학회 Plant Biotechnology Reports Plant Biotechnology Reports 제14권 제6호
발행연도
2020.1
수록면
703 - 712 (10page)

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The Glycogen synthase kinase 3 (GSK3)-like kinase BRASSINOSTEROID-INSENSITIVE2 (BIN2), a major negative regulator in the Brassinosteroids (BRs) signaling, is involved in a variety of plant signaling pathways by interacting with novel substrates and plays a major role in cellular, growth and developmental regulation. Despite BIN2 functional studies including BR signaling related proteasome-mediated BIN2 degradation, the molecular regulating mechanisms and it’s related the protein component for regulating BIN2 degradation has not been completely known. This study aimed to i) identify BIN2 protein and its interacting partner from HA-Immunoprecipitation (IP) of the BL-treated BIN2-HA and bin2-6D-HA lines, using liquid chromatography tandem mass spectrometry (LC?MS/MS) and matrix-assisted laser desorption/ionization time-of-fight/time-of-fight mass spectrometry (MALDI?TOF/TOF MS) and ii) characterize relationships between BIN2 and interacting partner proteins. We generated transgenic plants constitutively expressing BIN2-HA, bin2-6D (BIN2E264K)-HA, and BIN2KD (BIN2K69R)-HA construct. IP of the HA-tagged bin2-6D/BIN2 protein followed by mass spectrometry identifed F-box protein, BRASSINOSTEROID F-BOX 1 (BRF1) and BRF2 containing the LRR and FBD domain, as interacting proteins with BIN2. Validation in?vitro by yeast two-hybrid analyses further confrmed the interacting protein. These results, together with phylogeny and sequence alignments of BRF1 and BRF2 homologs multiple methods, suggest that f-box protein BRF1 and BRF2 play redundant or overlapping roles in regulating BIN2. It is likely that the BIN2 protein stability is controlled by BRF1 and BRF2.

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