6hsv

Engineered higher-order assembly of Cholera Toxin B subunits via the addition of C-terminal parallel coiled-coiled domains

spinqualitylabelsall models 6hsv, resolution 2.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6hsv is a 20 chain structure with sequence from Vibrio cholerae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.45Å Ligands: CL, MPD, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CHTB_VIBCH The B subunit pentameric ring directs the A subunit to its target by binding to the GM1 gangliosides present on the surface of the intestinal epithelial cells. It can bind five GM1 gangliosides. It has no toxic activity by itself. Publication Abstract from PubMed The self-assembly of proteins into higher order structures is ubiquitous in living systems. It is also an essential process for the bottom-up creation of novel molecular architectures and devices for synthetic biology. However, the complexity of protein-protein interaction surfaces makes it challenging to mimic natural assembly processes in artificial systems. Indeed, many successful computationally designed protein assemblies are pre-screened for 'designability', limiting the choice of components. Here, we report a simple and pragmatic strategy to assemble chosen multi-subunit proteins into more complex structures. A coiled-coil domain appended to one face of the pentameric cholera toxin B-subunit (CTB) enabled the ordered assembly of tubular supra-molecular complexes. X-ray crystallography and analysis of a tubular structure has revealed a hierarchical assembly process that displays features reminiscent of the polymorphic assembly of polyomavirus proteins. The approach provides a simple and straightforward method to direct the assembly of protein building blocks which present either termini on a single face of an oligomer. This scaffolding approach can be used to generate bespoke supramolecular assemblies of functional proteins. Additionally, structural resolution of the scaffolded assemblies highlight 'native-state' forced protein-protein interfaces, which may prove useful as starting conformations for future computational design. Directed assembly of homo-pentameric cholera toxin B-subunit proteins into higher-order structures using coiled-coil appendages.,Ross JF, Wildsmith GC, Johnson M, Hurdiss D, Hollingsworth K, Thompson RF, Mosayebi M, Trinh CH, Paci E, Pearson AR, Webb ME, Turnbull WB J Am Chem Soc. 2019 Mar 11. doi: 10.1021/jacs.8b11480. PMID:30856321 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cholera toxin 3D structures

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