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Phototropin receptor kinase activation by blue light.

Jones, Matthew A and Christie, John M (2008) 'Phototropin receptor kinase activation by blue light.' Plant Signal Behav, 3 (1). 44 - 46. ISSN 1559-2316

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Phototropins (phot1 and phot2) are blue light-activated serine/threonine protein kinases that function to mediate a variety of adaptive processes that serve to optimize the photosynthetic efficiency of plants and thereby promote their growth. Light sensing by the phototropins is mediated by a repeated motif located within the N-terminal region of the protein designated the LOV domain. Although phototropins possess two LOV photosensors (LOV1 and LOV2), recent biophysical and structure-function analyses clearly indicate that the LOV2 domain plays a predominant role in regulating phototropin kinase activity owing to specific protein changes that occur in response to LOV2 photoexcitation. In particular, the central beta-sheet scaffold plays a role in propagating the photochemical signal generated from within LOV2 to protein changes at the surface that are necessary for kinase activation.

Item Type: Article
Uncontrolled Keywords: FMN, LOV domain, amphipathic helix, cysteinyl adduct, phototropin, receptor autophosphoryation
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health > Biological Sciences, School of
Depositing User: Jim Jamieson
Date Deposited: 11 Jan 2013 15:51
Last Modified: 22 May 2019 17:15

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