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Functional analysis of related Cr RLK 1L receptor‐like kinases in pollen tube reception
Author(s) -
Kessler Sharon A,
Lindner Heike,
Jones Daniel S,
Grossniklaus Ueli
Publication year - 2015
Publication title -
embo reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.584
H-Index - 184
eISSN - 1469-3178
pISSN - 1469-221X
DOI - 10.15252/embr.201438801
Subject(s) - pollen tube , kinase , protein kinase domain , biology , arabidopsis , signal transduction , extracellular , microbiology and biotechnology , biochemistry , pollen , botany , gene , mutant , pollination
The Catharanthus roseus Receptor‐Like Kinase 1‐like (Cr RLK 1L) family of 17 receptor‐like kinases ( RLK s) has been implicated in a variety of signaling pathways in Arabidopsis , ranging from pollen tube ( PT ) reception and tip growth to hormonal responses. The extracellular domains of these RLK s have malectin‐like domains predicted to bind carbohydrate moieties. Domain swap analysis showed that the extracellular domains of the three members analyzed ( FER , ANX 1, HERK 1) are not interchangeable, suggesting distinct upstream components, such as ligands and/or co‐factors. In contrast, their intercellular domains are functionally equivalent for PT reception, indicating that they have common downstream targets in their signaling pathways. The kinase domain is necessary for FER function, but kinase activity itself is not, indicating that other kinases may be involved in signal transduction during PT reception.