1xof

Heterooligomeric Beta Beta Alpha Miniprotein

spinqualitylabelsall models 1xof, resolution 1.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1xof is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: ACE, DAL, DBZ, DPR Related: 1sn9, 1sna, 1sne Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The study of short, autonomously folding peptides, or "miniproteins," is important for advancing our understanding of protein stability and folding specificity. Although many examples of synthetic alpha-helical structures are known, relatively few mixed alpha/beta structures have been successfully designed. Only one mixed-secondary structure oligomer, an alpha/beta homotetramer, has been reported thus far. In this report, we use structural analysis and computational design to convert this homotetramer into the smallest known alpha/beta-heterotetramer. Computational screening of many possible sequence/structure combinations led efficiently to the design of short, 21-residue peptides that fold cooperatively and autonomously into a specific complex in solution. A 1.95 A crystal structure reveals how steric complementarity and charge patterning encode heterospecificity. The first- and second-generation heterotetrameric miniproteins described here will be useful as simple models for the analysis of protein-protein interaction specificity and as structural platforms for the further elaboration of folding and function. Design of a heterospecific, tetrameric, 21-residue miniprotein with mixed alpha/beta structure.,Ali MH, Taylor CM, Grigoryan G, Allen KN, Imperiali B, Keating AE Structure. 2005 Feb;13(2):225-34. PMID:15698566 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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