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Functional analysis of related CrRLK1L receptor-like kinases in pollen tube reception

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Kessler S. A., Lindner H., Jones D. S., Grossniklaus U.,
Project The Genetic and Molecular Basis of Gametogenesis and Maternal Effects in Arabidopsis
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Original article (peer-reviewed)

Journal EMBO reports
Volume (Issue) 16(1)
Page(s) 107 - 115
Title of proceedings EMBO reports
DOI 10.15252/embr.201438801

Abstract

The Catharanthus roseus Receptor-Like Kinase 1-like (CrRLK1L) family of 17 receptor-like kinases (RLKs) 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 RLKs have malectin-like domains predicted to bind carbohydrate moieties. Domain swap analysis showed that the extracellular domains of the three members analyzed (FER, ANX1, HERK1) 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.
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