2oyb

The crystal structure of OspA mutant

spinqualitylabelsall models 2oyb, resolution 1.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2oyb is a 1 chain structure with sequence from Borrelia burgdorferi. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 2oy1, 2oy5, 2oy7, 2oy8 Gene: ospA (Borrelia burgdorferi) Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Though beta-rich self-assemblies comprise a major structural class of polypeptides, a detailed understanding of the determinants of their structure and stability is lacking. In particular, the roles of repetitive stretches of side chains running the long axis of these beta-sheets, termed "cross-strand ladders," remain poorly characterized due to the inherently insoluble and heterogeneous nature of self-assemblies. To overcome these experimental challenges, we have established a complementary experimental system termed "peptide self-assembly mimics" (PSAMs). The PSAMs capture a defined number of self-assembly-like peptide repeats within a soluble beta-rich protein, making structural and energetic studies possible. In this work, we investigated the role of cross-strand ladders containing aromatic residues, which are prominent in self-assembling peptides. A combination of solution data and high-resolution crystal structures revealed that a single cross-strand ladder consisting solely of Tyr significantly stabilized, rigidified, and flattened the PSAM beta-sheet. These characteristics would stabilize each beta-sheet layer of a self-assembly and direct sheet conformations compatible with lamination. Our results therefore provide a rationale for the abundance of aromatic amino acids in fibril-forming peptides and establish important roles of cross-strand Tyr ladders in the structure and stability of beta-rich peptide self-assemblies. Aromatic cross-strand ladders control the structure and stability of beta-rich peptide self-assembly mimics.,Biancalana M, Makabe K, Koide A, Koide S J Mol Biol. 2008 Oct 31;383(1):205-13. Epub 2008 Aug 22. PMID:18762191 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Outer surface protein

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