Journal
EMBO REPORTS
Volume 16, Issue 1, Pages 107-115Publisher
WILEY
DOI: 10.15252/embr.201438801
Keywords
Arabidopsis; FERONIA; pollen tube reception; receptor-like kinases; signaling
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Funding
- University of Zurich
- University of Oklahoma
- Swiss National Science Foundation (SNF)
- Human Frontiers in Science Long-term Fellowship
- Research Module of the SNF ProDoc Program 'Molecular Life Sciences'
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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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