5dnu

Crystal structure of Striga KAI2-like protein in complex with karrikin

spinqualitylabelsall models 5dnu, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5dnu is a 1 chain structure with sequence from Striga hermonthica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.2Å Ligands: BEZ, EDO, FMT, KKN, NA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0M3PN85_STRHE Publication Abstract from PubMed The perception of two plant germination inducers, karrikins and strigolactones, are mediated by the proteins KAI2 and D14. Recently, KAI2-type proteins from parasitic weeds, which are possibly related to seed germination induced by strigolactone, have been classified into three clades characterized by different responses to karrikin/strigolactone. Here we characterized a karrikin-binding protein in Striga (ShKAI2iB) that belongs to intermediate-evolving KAI2 and provided the structural bases for its karrikin-binding specificity. Binding assays showed that ShKAI2iB bound karrikins but not strigolactone, differing from other KAI2 and D14. The crystal structures of ShKAI2iB and ShKAI2iB-karrikin complex revealed obvious structural differences in a helix located at the entry of its ligand-binding cavity. This results in a smaller closed pocket, which is also the major cause of ShKAI2iB's specificity of binding karrikin. Our structural study also revealed that a few non-conserved amino acids led to the distinct ligand-binding profile of ShKAI2iB, suggesting that the evolution of KAI2 resulted in its diverse functions. Structural basis of unique ligand specificity of KAI2-like protein from parasitic weed Striga hermonthica.,Xu Y, Miyakawa T, Nakamura H, Nakamura A, Imamura Y, Asami T, Tanokura M Sci Rep. 2016 Aug 10;6:31386. doi: 10.1038/srep31386. PMID:27507097 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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