title: The state of cell wall pectin monitored by wall associated kinases: A model.
abstract: The Wall Associated Kinases (WAKs) bind to both cross-linked polymers of pectin in the plant cell wall, but have a higher affinity for smaller fragmented pectins that are generated upon pathogen attack or wounding. WAKs are required for cell expansion during normal seedling development and this involves pectin binding and a signal transduction pathway involving MPK3 and invertase induction. Alternatively WAKs bind pathogen generated pectin fragments to activate a distinct MPK6 dependent stress response. Evidence is provided for a model for how newly generated pectin fragments compete for longer pectins to alter the WAK dependent responses.
authors.affiliation: a Department of Biology ; Bowdoin College ; Brunswick , ME USA.
authors.forename: Bruce D
authors.initials: BD
authors.lastname: Kohorn
mesh_terms: D002473:Cell Wall / Q000201:enzymology*; D008954:Models, Biological; D009844:Oligosaccharides / Q000378:metabolism; D010368:Pectins / Q000378:metabolism*; D011494:Protein Kinases / Q000378:metabolism*
chemical_list: D009844:Oligosaccharides; C412763:oligogalacturonic acid; D010368:Pectins; D011494:Protein Kinases
keywords: Arabidopsis; cell wall; plant defense; receptors; signaling