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

• Published in: Current opinion in plant biology Vol. 15; no. 6; pp. 659 - 669
• Main Authors: Lindner, Heike, Müller, Lena Maria, Boisson-Dernier, Aurélien, Grossniklaus, Ueli
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.12.2012
• Subjects: abiotic stress; Arabidopsis; Arabidopsis - enzymology; Arabidopsis - genetics; Arabidopsis - immunology; Arabidopsis - microbiology; Arabidopsis Proteins - genetics; Arabidopsis Proteins - metabolism; asexual reproduction; Catharanthus roseus; Cell Communication; Cell Enlargement; cell growth; Cell Polarity; Cell Wall - enzymology; Cell Wall - immunology; cell wall components; kinases; pathogens; Phosphotransferases - genetics; Phosphotransferases - metabolism; Plant Cells - enzymology; Plant Diseases - immunology; Plant Diseases - microbiology; pollen; Pollen Tube - cytology; Pollen Tube - enzymology; post-translational modification; Protein Kinases - genetics; Protein Kinases - metabolism; Protein Processing, Post-Translational; proteins; Pseudomonas syringae - immunology; Pseudomonas syringae - pathogenicity; signal transduction; Stress, Physiological; Transcription, Genetic
• ISSN: 1369-5266; 1879-0356
• DOI: 10.1016/j.pbi.2012.07.003

► Sensing cell wall integrity is important for development, reproduction, and defense. ► The CrRLK1L subfamily of kinases could play a key role in cell wall perception. ► CrRLK1Ls have functions in various tissues and under diverse conditions. ► Post-translational modifications may play an important role in CrRLK1L signaling. 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.