6A5C
Crystal structure of plant Receptor-like Kinase ANX2
Summary for 6A5C
| Entry DOI | 10.2210/pdb6a5c/pdb |
| Descriptor | Receptor-like protein kinase ANXUR2 (2 entities in total) |
| Functional Keywords | a plant receptor a2, transferase |
| Biological source | Arabidopsis thaliana (Mouse-ear cress) |
| Total number of polymer chains | 1 |
| Total formula weight | 47216.89 |
| Authors | |
| Primary citation | Xiao, Y.,Stegmann, M.,Han, Z.,DeFalco, T.A.,Parys, K.,Xu, L.,Belkhadir, Y.,Zipfel, C.,Chai, J. Mechanisms of RALF peptide perception by a heterotypic receptor complex. Nature, 572:270-274, 2019 Cited by PubMed Abstract: Receptor kinases of the Catharanthus roseus RLK1-like (CrRLK1L) family have emerged as important regulators of plant reproduction, growth and responses to the environment. Endogenous RAPID ALKALINIZATION FACTOR (RALF) peptides have previously been proposed as ligands for several members of the CrRLK1L family. However, the mechanistic basis of this perception is unknown. Here we report that RALF23 induces a complex between the CrRLK1L FERONIA (FER) and LORELEI (LRE)-LIKE GLYCOSYLPHOSPHATIDYLINOSITOL (GPI)-ANCHORED PROTEIN 1 (LLG1) to regulate immune signalling. Structural and biochemical data indicate that LLG1 (which is genetically important for RALF23 responses) and the related LLG2 directly bind RALF23 to nucleate the assembly of RALF23-LLG1-FER and RALF23-LLG2-FER heterocomplexes, respectively. A conserved N-terminal region of RALF23 is sufficient for the biochemical recognition of RALF23 by LLG1, LLG2 or LLG3, and binding assays suggest that other RALF peptides that share this conserved N-terminal region may be perceived by LLG proteins in a similar manner. Structural data also show that RALF23 recognition is governed by the conformationally flexible C-terminal sides of LLG1, LLG2 and LLG3. Our work reveals a mechanism of peptide perception in plants by GPI-anchored proteins that act together with a phylogenetically unrelated receptor kinase. This provides a molecular framework for understanding how diverse RALF peptides may regulate multiple processes, through perception by distinct heterocomplexes of CrRLK1L receptor kinases and GPI-anchored proteins of the LRE and LLG family. PubMed: 31291642DOI: 10.1038/s41586-019-1409-7 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.68 Å) |
Structure validation
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