CRY1 inhibits COP1-mediated degradation of BIT1, a MYB transcription factor, to activate blue light-dependent gene expression in Arabidopsis

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dc.contributor.authorHong, Sung Hyunko
dc.contributor.authorKim, Hyo Jungko
dc.contributor.authorRyu, Jong Sangko
dc.contributor.authorChoi, Hyunmoko
dc.contributor.authorJeong, Suyeongko
dc.contributor.authorShin, Jieunko
dc.contributor.authorChoi, Giltsuko
dc.contributor.authorNam, Hong Gilko
dc.date.accessioned2013-03-07T14:53:11Z-
dc.date.available2013-03-07T14:53:11Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2008-08-
dc.identifier.citationPLANT JOURNAL, v.55, no.3, pp.361 - 371-
dc.identifier.issn0960-7412-
dc.identifier.urihttp://hdl.handle.net/10203/90433-
dc.description.abstractCryptochromes (CRY) are one of the two major classes of photoreceptors that perceive light stimuli in the UV-A to blue light region and they are involved in multiple aspects of plant growth and development. However, knowledge regarding their signaling transduction components and mechanisms remains limited. Here, we report that a MYB transcription factor Blue Insensitive Trait 1 (BIT1), plays an important role in controlling blue light responses. Hypocotyl growth responses indicate that BIT1 functions as a positive element in blue light signaling, since BIT1 antisense and knock-out lines show a reduced light response in blue light. BIT1 controls blue light-dependent expression of various genes such as PsbS, a member of the light-harvesting complex gene family. A transactivation assay showed that BIT1 regulates promoter activity of PsbS in a blue light-dependent manner and that it requires CRY1 for activation of the PsbS promoter. BIT1 undergoes degradation in darkness and CRY1 functions to stabilize BIT1 in a blue light-dependent manner. In contrast, COP1 binds to BIT1 and mediates its degradation. We propose that the PsbS promoter is activated in blue light via the blue light-dependent stabilization of BIT1 by CRY1, while in darkness BIT1 is degraded by COP1-mediated proteolysis.-
dc.languageEnglish-
dc.publisherBLACKWELL PUBLISHING-
dc.subjectMEDIATED PHOTOMORPHOGENIC GROWTH-
dc.subjectSIGNAL-TRANSDUCTION-
dc.subjectHIGHER-PLANTS-
dc.subjectPHYTOCHROME-
dc.subjectCOP1-
dc.subjectCRYPTOCHROME-
dc.subjectPROTEIN-
dc.subjectTHALIANA-
dc.subjectHYPOCOTYL-
dc.subjectPATHWAYS-
dc.titleCRY1 inhibits COP1-mediated degradation of BIT1, a MYB transcription factor, to activate blue light-dependent gene expression in Arabidopsis-
dc.typeArticle-
dc.identifier.wosid000262605300001-
dc.identifier.scopusid2-s2.0-47749128874-
dc.type.rimsART-
dc.citation.volume55-
dc.citation.issue3-
dc.citation.beginningpage361-
dc.citation.endingpage371-
dc.citation.publicationnamePLANT JOURNAL-
dc.identifier.doi10.1111/j.1365-313X.2008.03508.x-
dc.contributor.localauthorChoi, Giltsu-
dc.contributor.nonIdAuthorHong, Sung Hyun-
dc.contributor.nonIdAuthorKim, Hyo Jung-
dc.contributor.nonIdAuthorRyu, Jong Sang-
dc.contributor.nonIdAuthorChoi, Hyunmo-
dc.contributor.nonIdAuthorJeong, Suyeong-
dc.contributor.nonIdAuthorShin, Jieun-
dc.contributor.nonIdAuthorNam, Hong Gil-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorArabidopsis-
dc.subject.keywordAuthorBIT1-
dc.subject.keywordAuthorblue light-
dc.subject.keywordAuthorCOP1-
dc.subject.keywordAuthorCRY1-
dc.subject.keywordPlusMEDIATED PHOTOMORPHOGENIC GROWTH-
dc.subject.keywordPlusSIGNAL-TRANSDUCTION-
dc.subject.keywordPlusHIGHER-PLANTS-
dc.subject.keywordPlusPHYTOCHROME-
dc.subject.keywordPlusCOP1-
dc.subject.keywordPlusCRYPTOCHROME-
dc.subject.keywordPlusPROTEIN-
dc.subject.keywordPlusTHALIANA-
dc.subject.keywordPlusHYPOCOTYL-
dc.subject.keywordPlusPATHWAYS-
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