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beta-Helical architecture of cytoskeletal bactofilin filaments revealed by solid-state NMR

dc.contributor.authorVASA, S.
dc.contributor.authorLIN, L.
dc.contributor.authorSHI, C.
dc.contributor.authorHABENSTEIN, Birgit
dc.contributor.authorRIEDEL, D.
dc.contributor.authorKUHN, J.
dc.contributor.authorTHANBICHLER, M.
dc.contributor.authorLANGE, A.
dc.date.accessioned2020-09-03T08:02:09Z
dc.date.available2020-09-03T08:02:09Z
dc.date.issued2015
dc.identifier.issn0027-8424
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/10976
dc.description.abstractEnBactofilins are a widespread class of bacterial filament-forming proteins, which serve as cytoskeletal scaffolds in various cellular pathways. They are characterized by a conserved architecture, featuring a central conserved domain (DUF583) that is flanked by variable terminal regions. Here, we present a detailed investigation of bactofilin filaments from Caulobacter crescentus by high-resolution solid-state NMR spectroscopy. De novo sequential resonance assignments were obtained for residues Ala39 to Phe137, spanning the conserved DUF583 domain. Analysis of the secondary chemical shifts shows that this core region adopts predominantly beta-sheet secondary structure. Mutational studies of conserved hydrophobic residues located in the identified beta-strand segments suggest that bactofilin folding and polymerization is mediated by an extensive and redundant network of hydrophobic interactions, consistent with the high intrinsic stability of bactofilin polymers. Transmission electron microscopy revealed a propensity of bactofilin to form filament bundles as well as sheet-like, 2D crystalline assemblies, which may represent the supramolecular arrangement of bactofilin in the native context. Based on the diffraction pattern of these 2D crystalline assemblies, scanning transmission electron microscopy measurements of the mass per length of BacA filaments, and the distribution of beta-strand segments identified by solid-state NMR, we propose that the DUF583 domain adopts a beta-helical architecture, in which 18 beta-strand segments are arranged in six consecutive windings of a beta-helix.
dc.language.isoen
dc.title.enbeta-Helical architecture of cytoskeletal bactofilin filaments revealed by solid-state NMR
dc.title.alternativeProceedings of the National Academy of Sciences of the United States of America
dc.typeArticle de revue
dc.identifier.doi10.1073/pnas.1418450112
dc.subject.halChimie/Matériaux
bordeaux.journalProc Natl Acad Sci U S A
bordeaux.pageE127-36
bordeaux.volume112
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN) - UMR 5248*
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN, UMR 5248)
bordeaux.issue2
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Proc%20Natl%20Acad%20Sci%20U%20S%20A&rft.date=2015&rft.volume=112&rft.issue=2&rft.spage=E127-36&rft.epage=E127-36&rft.eissn=0027-8424&rft.issn=0027-8424&rft.au=VASA,%20S.&LIN,%20L.&SHI,%20C.&HABENSTEIN,%20Birgit&RIEDEL,%20D.&rft.genre=article


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