8es2

Backbone modifications in the inter-helix loop of designed miniprotein oPPalpha: Aib10Asn11 turn

spinqualitylabelsall models 8es2 Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8es2 is a 1 chain structure with sequence from Streptococcus mutans. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Ligands: ACE, AIB, NH2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The importance of beta-turns to protein folding has motivated extensive efforts to stabilize the motif with non-canonical backbone connectivity. Prior work has focused almost exclusively on turns between strands in a beta-sheet (i. e., hairpins). Turns in other structural contexts are also common in nature and have distinct conformational preferences; however, design principles for their mimicry remain poorly understood. Here, we report strategies that stabilize non-hairpin beta-turns through systematic evaluation of the impacts of backbone alteration on the high-resolution folded structure and folded stability of a helix-loop-helix prototype protein. Several well-established hairpin turn mimetics are shown detrimental to folded stability and/or hydrophobic core packing, while less-explored modification schemes that reinforce alternate turn types lead to improved stability and more faithful structural mimicry. Collectively, these results have implications in control over protein folding through chemical modification as well as the design of protein mimetics. Protein Backbone Alteration in Non-Hairpin beta-Turns: Impacts on Tertiary Folded Structure and Folded Stability.,Harmon TW, Horne WS Chembiochem. 2023 Mar 15:e202300113. doi: 10.1002/cbic.202300113. PMID:36920327 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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