The C-terminal kinase fragment of Arabidopsis phototropin 2 triggers constitutive phototropin responses
نویسندگان
چکیده
منابع مشابه
Physiological roles of the light, oxygen, or voltage domains of phototropin 1 and phototropin 2 in Arabidopsis.
Phototropins (phot1 and phot2) are plant blue-light receptors that mediate phototropism, chloroplast movement, stomatal opening, rapid inhibition of growth of etiolated seedlings, and leaf expansion in Arabidopsis (Arabidopsis thaliana). Their N-terminal region contains two light, oxygen, or voltage (LOV) domains, which bind flavin mononucleotide and form a covalent adduct between a conserved c...
متن کاملFunctional characterization of Arabidopsis phototropin 1 in the hypocotyl apex
Phototropin (phot1) is a blue light-activated plasma membrane-associated kinase that acts as the principal photoreceptor for shoot phototropism in Arabidopsis in conjunction with the signalling component Non-Phototropic Hypocotyl 3 (NPH3). PHOT1 is uniformly expressed throughout the Arabidopsis hypocotyl, yet decapitation experiments have localized the site of light perception to the upper hypo...
متن کاملFunctional characterization of a constitutively active kinase variant of Arabidopsis phototropin 1
Phototropins (phots) are plasma membrane-associated serine/threonine kinases that coordinate a range of processes linked to optimizing photosynthetic efficiency in plants. These photoreceptors contain two light-, oxygen-, or voltage-sensing (LOV) domains within their N terminus, with each binding one molecule of flavin mononucleotide as a UV/blue light-absorbing chromophore. Although phots cont...
متن کاملBlue light-regulated molecular switch of Ser/Thr kinase in phototropin.
Phototropin is a blue light photoreceptor for tropic responses, relocation of chloroplasts, and stomata opening in plants. Phototropin has two chromophoric domains named light-oxygen-voltage-sensing (LOV) 1 and 2 in the N-terminal half, and a serine/threonine (Ser/Thr) protein kinase motif in the C-terminal half. Concerning the kinase activity of phototropin, only autophosphorylation has been d...
متن کاملTissue-autonomous promotion of palisade cell development by phototropin 2 in Arabidopsis.
Light is an important environmental information source that plants use to modify their growth and development. Palisade parenchyma cells in leaves develop cylindrical shapes in response to blue light; however, the photosensory mechanism for this response has not been elucidated. In this study, we analyzed the palisade cell response in phototropin-deficient mutants. First, we found that two diff...
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ژورنال
عنوان ژورنال: The Plant Journal
سال: 2007
ISSN: 0960-7412,1365-313X
DOI: 10.1111/j.1365-313x.2007.03187.x