STANDing strong, resistance proteins instigators of plant defence.
Resistance (R) proteins are involved in specific pathogen recognition and subsequent initiation of host defence. Most R proteins are nucleotide binding - leucine rich repeat (NB-LRR) proteins, which form a subgroup within the STAND (signal transduction ATPases with numerous domains) family. Activity of these multi-domain proteins depends on their ability to bind and hydrolyse nucleotides. Since R protein activation often triggers cell-death tight regulation of activation is essential. Autoinhibition, which seems to be accomplished by intramolecular interactions between the various domains, is important to retain R proteins inactive. This review summarizes recent data on intra- and intermolecular interactions that support a model in which pathogen perception triggers a series of conformational changes, allowing the newly exposed NB domain to interact with downstream signalling partners and activate defence signalling.
Lukasik
Ewa
E
Plant Pathology, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands.
Takken
Frank L W
FL
D054884:Host-Pathogen Interactions; D007113:Immunity, Innate; D000090263:Leucine-Rich Repeat Proteins; D008958:Models, Molecular; D010935:Plant Diseases / Q000276:immunology / Q000382:microbiology; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism*; D010944:Plants / Q000276:immunology / Q000378:metabolism* / Q000382:microbiology; D017434:Protein Structure, Tertiary; D011506:Proteins / Q000737:chemistry / Q000378:metabolism*; D015398:Signal Transduction
D000090263:Leucine-Rich Repeat Proteins; D010940:Plant Proteins; D011506:Proteins