1ugl

Solution structure of S8-SP11

spinqualitylabelsall models 1ugl Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ugl is a 1 chain structure with sequence from Brassica rapa. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN Function Q9SE17_BRACM Publication Abstract from PubMed Many flowering plants possess a self-incompatibility system to prevent inbreeding. In Brassica rapa, self/non-self recognition in mating is established through S-haplotype-specific interactions between stigma receptors and S-locus protein 11 (SP11, also called S-locus cysteine-rich protein) that is encoded at the highly polymorphic S-locus. Here we describe the solution structure of the SP11 protein of the S8-haplotype (S8-SP11), which specifically binds to the stigma factor of the same haplotype. It folds into an alpha/beta sandwich structure that resembles those of plant defensins. Residues important for structural integrity are highly conserved among the allelic SP11s, suggesting the existence of a common folding pattern. Structure-based sequence alignment and homology modeling of allelic SP11 identified a hyper-variable (HV) region, which is thought to form a loop that bulges out from the body of the protein that is amenable to solvent exposure. We suggest that the HV region could serve as a specific binding site for the stigma receptor. Structure of the male determinant factor for Brassica self-incompatibility.,Mishima M, Takayama S, Sasaki K, Jee JG, Kojima C, Isogai A, Shirakawa M J Biol Chem. 2003 Sep 19;278(38):36389-95. Epub 2003 Jun 30. PMID:12835321 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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