NDLI: Caractérisation d'une famille de récepteurs kinases impliqués dans le développement gamétophytique chez Arabidopsis thaliana

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Caractérisation d'une famille de récepteurs kinases impliqués dans le développement gamétophytique chez Arabidopsis thaliana

Content Provider	Semantic Scholar
Author	Houde, J. Jun.
Copyright Year	2010
Abstract	Cell to cell communication is paramount during plant developmental processes, from cellular identity in early organogenesis to pollen tube guidance. In response to this requirement, molecular cell signalling is used to perceive an external signal and transduce the response by an intracellular signalling cascade leading to specific gene activation. The sensing protein is typically a receptor kinase, which will transduce the stimulus by phosphorylation of a cytoplasmic interaction partner. Although plant receptor kinases represent the largest protein kinase family, only handfuls are well characterized. By sequence identity (orthology), a family of leucine-rich repeat receptor kinases from Arabidopsis thaliana was identified as AtORK11 (Arabidopsis thaliana Ovule Receptor Kinase 11). Based upon previous results from its ortholog in Solanum chacoense, the ovaryspecific ScORK11 receptor kinase, we hypothesized that members of the AtORK11 receptors would be involved in gametophyte development and reproduction. In order to characterize the role of the four family members (AtORK11a, AtORK11b, AtORK11c and AtORK11d), a T-DNA insertional mutant strategy was undertaken, as well as bimolecular fluorescence complementation assays (BiFC). No precise function could be assigned to the double mutants although a dominant negative strategy revealed an involvement in gametophytic development. It was also shown that all of the receptors could form homodimers as well as heterodimers in a heterologous system, suggesting high functional redundancy for the AtORK11 family.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://papyrus.bib.umontreal.ca/xmlui/bitstream/handle/1866/3756/Houde_Josee_2010_memoire.pdf?isAllowed=y&sequence=3
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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