Photoexcited CRY2 Interacts with CIB1 to Regulate Transcription and Floral Initiation in Arabidopsis Export

@article{citeulike:3749694, abstract = {Cryptochromes (CRY) are photolyase-like blue-light receptors that mediate light responses in plants and animals. How plant cryptochromes act in response to blue light is not well understood. We report here the identification and characterization of the Arabidopsis CIB1 (cryptochrome-interacting basic-helix-loop-helix) protein. CIB1 interacts with CRY2 (cryptochrome 2) in a blue light-specific manner in yeast and Arabidopsis cells, and it acts together with additional CIB1-related proteins to promote CRY2-dependent floral initiation. CIB1 binds to G box (CACGTG) in vitro with a higher affinity than its interaction with other E-box elements (CANNTG). However, CIB1 stimulates FT messenger RNA expression, and it interacts with chromatin DNA of the FT gene that possesses various E-box elements except G box. We propose that the blue light-dependent interaction of cryptochrome(s) with CIB1 and CIB1-related proteins represents an early photoreceptor signaling mechanism in plants. 10.1126/science.1163927}, author = {Liu, Hongtao and Yu, Xuhong and Li, Kunwu and Klejnot, John and Yang, Hongyun and Lisiero, Dominique and Lin, Chentao}, citeulike-article-id = {3749694}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1163927}, citeulike-linkout-1 = {http://www.sciencemag.org/cgi/content/abstract/322/5907/1535}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/18988809}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=18988809}, day = {5}, doi = {10.1126/science.1163927}, journal = {Science}, keywords = {arabidopsis, blue\_light, light\_sensing}, month = {December}, number = {5907}, pages = {1535--1539}, posted-at = {2008-12-05 09:21:23}, priority = {4}, title = {Photoexcited CRY2 Interacts with CIB1 to Regulate Transcription and Floral Initiation in Arabidopsis}, url = {http://dx.doi.org/10.1126/science.1163927}, volume = {322}, year = {2008} }

TY - JOUR ID - citeulike:3749694 L3 - citeulike-article-id:3749694 N2 - Cryptochromes (CRY) are photolyase-like blue-light receptors that mediate light responses in plants and animals. How plant cryptochromes act in response to blue light is not well understood. We report here the identification and characterization of the Arabidopsis CIB1 (cryptochrome-interacting basic-helix-loop-helix) protein. CIB1 interacts with CRY2 (cryptochrome 2) in a blue light-specific manner in yeast and Arabidopsis cells, and it acts together with additional CIB1-related proteins to promote CRY2-dependent floral initiation. CIB1 binds to G box (CACGTG) in vitro with a higher affinity than its interaction with other E-box elements (CANNTG). However, CIB1 stimulates FT messenger RNA expression, and it interacts with chromatin DNA of the FT gene that possesses various E-box elements except G box. We propose that the blue light-dependent interaction of cryptochrome(s) with CIB1 and CIB1-related proteins represents an early photoreceptor signaling mechanism in plants. 10.1126/science.1163927 IS - 5907 JF - Science EP - 1539 TI - Photoexcited CRY2 Interacts with CIB1 to Regulate Transcription and Floral Initiation in Arabidopsis VL - 322 SP - 1535 KW - arabidopsis KW - blue_light KW - light_sensing AU - Liu, Hongtao AU - Yu, Xuhong AU - Li, Kunwu AU - Klejnot, John AU - Yang, Hongyun AU - Lisiero, Dominique AU - Lin, Chentao PY - 2008/12/05/ UR - http://dx.doi.org/10.1126/science.1163927 ER -