2i5v

Crystal structure of OspA mutant

spinqualitylabelsall models 2i5v, resolution 1.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2i5v is a 1 chain structure with sequence from Atcc 35210. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PG4 Gene: ospA (ATCC 35210) Resources: FirstGlance, OCA, PDBe, 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 beta-Rich self-assembly is a major structural class of polypeptides, but still little is known about its atomic structures and biophysical properties. Major impediments for structural and biophysical studies of peptide self-assemblies include their insolubility and heterogeneous composition. We have developed a model system, termed peptide self-assembly mimic (PSAM), based on the single-layer beta-sheet of Borrelia outer surface protein A. PSAM allows for the capture of a defined number of self-assembly-like peptide repeats within a water-soluble protein, making structural and energetic studies possible. In this work, we extend our PSAM approach to a highly hydrophobic peptide sequence. We show that a penta-Ile peptide (Ile(5)), which is insoluble and forms beta-rich self-assemblies in aqueous solution, can be captured within the PSAM scaffold in a form capable of self-assembly. The 1.1-A crystal structure revealed that the Ile(5) stretch forms a highly regular beta-strand within this flat beta-sheet. Self-assembly models built with multiple copies of the crystal structure of the Ile(5) peptide segment showed no steric conflict, indicating that this conformation represents an assembly-competent form. The PSAM retained high conformational stability, suggesting that the flat beta-strand of the Ile(5) stretch primed for self-assembly is a low-energy conformation of the Ile(5) stretch and rationalizing its high propensity for self-assembly. The ability of the PSAM to "solubilize" an otherwise insoluble peptide stretch suggests the potential of the PSAM approach to the characterization of self-assembling peptides. High-resolution structure of a self-assembly-competent form of a hydrophobic peptide captured in a soluble beta-sheet scaffold.,Makabe K, Biancalana M, Yan S, Tereshko V, Gawlak G, Miller-Auer H, Meredith SC, Koide S J Mol Biol. 2008 Apr 25;378(2):459-67. Epub 2008 Mar 4. PMID:18367205 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Outer surface protein

Proteopedia Page Contributors and Editors (what is this?)

OCA