CrRLK1L receptor-like kinases: not just another brick in the wall

Curr Opin Plant Biol. 2012 Dec;15(6):659-69. doi: 10.1016/j.pbi.2012.07.003. Epub 2012 Aug 10.


In plants, receptor-like kinases regulate many processes during reproductive and vegetative development. The Arabidopsis subfamily of Catharanthus roseus RLK1-like kinases (CrRLK1Ls) comprises 17 members with a putative extracellular carbohydrate-binding malectin-like domain. Only little is known about the functions of these proteins, although mutant analyses revealed a role during cell elongation, polarized growth, and fertilization. However, the molecular nature of the underlying signal transduction cascades remains largely unknown. CrRLK1L proteins are also involved in biotic and abiotic stress responses. It is likely that carbohydrate-rich ligands transmit a signal, which could originate from cell wall components, an arriving pollen tube, or a pathogen attack. Thus, post-translational modifications could be crucial for CrRLK1L signal transduction and ligand binding.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Arabidopsis / enzymology
  • Arabidopsis / genetics
  • Arabidopsis / immunology
  • Arabidopsis / microbiology
  • Arabidopsis Proteins / genetics
  • Arabidopsis Proteins / metabolism*
  • Cell Communication*
  • Cell Enlargement
  • Cell Polarity
  • Cell Wall / enzymology*
  • Cell Wall / immunology
  • Phosphotransferases / genetics
  • Phosphotransferases / metabolism*
  • Plant Cells / enzymology
  • Plant Diseases / immunology
  • Plant Diseases / microbiology
  • Pollen Tube / cytology
  • Pollen Tube / enzymology
  • Protein Kinases / genetics
  • Protein Kinases / metabolism
  • Protein Processing, Post-Translational
  • Pseudomonas syringae / immunology
  • Pseudomonas syringae / pathogenicity
  • Stress, Physiological
  • Transcription, Genetic


  • Arabidopsis Proteins
  • FERONIA receptor like kinase, Arabidopsis
  • Phosphotransferases
  • Protein Kinases
  • HERCULES1 protein, Arabidopsis