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Molecular structure of the intact bacterial flagellar basal body
The bacterial flagellum is a macromolecular protein complex that enables motility in many species. Bacterial flagella self-assemble a strong, multi-component drive shaft which couples rotation in the inner membrane to the microns-long flagellar filament that powers bacterial swimming in viscous flui...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7610862/ https://www.ncbi.nlm.nih.gov/pubmed/33931760 http://dx.doi.org/10.1038/s41564-021-00895-y |
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author | Johnson, Steven Furlong, Emily J. Deme, Justin C. Nord, Ashley L. Caesar, Joseph J.E. Chevance, Fabienne F.V. Berry, Richard M. Hughes, Kelly T. Lea, Susan M. |
author_facet | Johnson, Steven Furlong, Emily J. Deme, Justin C. Nord, Ashley L. Caesar, Joseph J.E. Chevance, Fabienne F.V. Berry, Richard M. Hughes, Kelly T. Lea, Susan M. |
author_sort | Johnson, Steven |
collection | PubMed |
description | The bacterial flagellum is a macromolecular protein complex that enables motility in many species. Bacterial flagella self-assemble a strong, multi-component drive shaft which couples rotation in the inner membrane to the microns-long flagellar filament that powers bacterial swimming in viscous fluids(1–3). We here present structures of the intact Salmonella flagellar basal body(4), encompassing the inner membrane rotor, drive shaft, and outer membrane bushing, solved using cryo-electron microscopy to resolutions between 2.2 and 3.7 Å. The structures reveal molecular details of how 173 protein molecules of 13 different types assemble into a complex spanning two membranes and a cell wall. The helical drive shaft at one end is intricately interwoven with the rotor component with both the export gate complex and the proximal rod forming interactions with the MS-ring. At the other end, the drive shaft distal rod passes through the LP-ring bushing complex, which functions as a molecular bearing anchored in the outer membrane via interactions with the lipopolysaccharide. The in situ structure of a protein complex capping the drive shaft provides molecular insight into the assembly process of this molecular machine. |
format | Online Article Text |
id | pubmed-7610862 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
record_format | MEDLINE/PubMed |
spelling | pubmed-76108622021-10-30 Molecular structure of the intact bacterial flagellar basal body Johnson, Steven Furlong, Emily J. Deme, Justin C. Nord, Ashley L. Caesar, Joseph J.E. Chevance, Fabienne F.V. Berry, Richard M. Hughes, Kelly T. Lea, Susan M. Nat Microbiol Article The bacterial flagellum is a macromolecular protein complex that enables motility in many species. Bacterial flagella self-assemble a strong, multi-component drive shaft which couples rotation in the inner membrane to the microns-long flagellar filament that powers bacterial swimming in viscous fluids(1–3). We here present structures of the intact Salmonella flagellar basal body(4), encompassing the inner membrane rotor, drive shaft, and outer membrane bushing, solved using cryo-electron microscopy to resolutions between 2.2 and 3.7 Å. The structures reveal molecular details of how 173 protein molecules of 13 different types assemble into a complex spanning two membranes and a cell wall. The helical drive shaft at one end is intricately interwoven with the rotor component with both the export gate complex and the proximal rod forming interactions with the MS-ring. At the other end, the drive shaft distal rod passes through the LP-ring bushing complex, which functions as a molecular bearing anchored in the outer membrane via interactions with the lipopolysaccharide. The in situ structure of a protein complex capping the drive shaft provides molecular insight into the assembly process of this molecular machine. 2021-04-30 2021-06 /pmc/articles/PMC7610862/ /pubmed/33931760 http://dx.doi.org/10.1038/s41564-021-00895-y Text en http://www.nature.com/authors/editorial_policies/license.html#termsUsers may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use: http://www.nature.com/authors/editorial_policies/license.html#terms |
spellingShingle | Article Johnson, Steven Furlong, Emily J. Deme, Justin C. Nord, Ashley L. Caesar, Joseph J.E. Chevance, Fabienne F.V. Berry, Richard M. Hughes, Kelly T. Lea, Susan M. Molecular structure of the intact bacterial flagellar basal body |
title | Molecular structure of the intact bacterial flagellar basal body |
title_full | Molecular structure of the intact bacterial flagellar basal body |
title_fullStr | Molecular structure of the intact bacterial flagellar basal body |
title_full_unstemmed | Molecular structure of the intact bacterial flagellar basal body |
title_short | Molecular structure of the intact bacterial flagellar basal body |
title_sort | molecular structure of the intact bacterial flagellar basal body |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7610862/ https://www.ncbi.nlm.nih.gov/pubmed/33931760 http://dx.doi.org/10.1038/s41564-021-00895-y |
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