ArticleProtein science : a publication of the Protein Society2017
Structure of the magnetosome-associated actin-like MamK filament at subnanometer resolution.
Article in Protein science : a publication of the Protein Society, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Visualizing the dynamic polymerization of the bacterial actin-like cytoskeleton for magnetic organelle positioning.Scientific reports · 2025Article
- A family of bacterial actin homologs forms a three-stranded tubular structure.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Bacterial Organelles in Iron Physiology.Molecular microbiology · 2024Review
- Actin network evolution as a key driver of eukaryotic diversification.Journal of cell science · 2024Review
- Archaeal actins and the origin of a multi-functional cytoskeleton.Journal of bacteriology · 2024Review
- Bacterial Magnetosomes Release Iron Ions and Induce Regulation of Iron Homeostasis in Endothelial Cells.Nanomaterials (Basel, Switzerland) · 2022Article
- A Compass To Boost Navigation: Cell Biology of Bacterial Magnetotaxis.Journal of bacteriology · 2020Review
- Conservation of conformational dynamics across prokaryotic actins.PLoS computational biology · 2019Article
- Cryo-EM structure of the bacterial actin AlfA reveals unique assembly and ATP-binding interactions and the absence of a conserved subdomain.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- Evolution of polymer formation within the actin superfamily.Molecular biology of the cell · 2017Review
- X-ray and cryo-EM structures of monomeric and filamentous actin-like protein MamK reveal changes associated with polymerization.Proceedings of the National Academy of Sciences of the United States of America · 2016Article
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10 authors.
Funding
Abstract
Magnetotactic bacteria possess cellular compartments called magnetosomes that sense magnetic fields. Alignment of magnetosomes in the bacterial cell is necessary for their function, and this is achieved through anchoring of magnetosomes to filaments composed of the protein MamK. MamK is an actin homolog that polymerizes upon ATP binding. Here, we report the structure of the MamK filament at ∼6.5 Å, obtained by cryo-Electron Microscopy. This structure confirms our previously reported double-stranded, nonstaggered architecture, and reveals the molecular basis for filament formation. While MamK is closest in sequence to the bacterial actin MreB, the longitudinal contacts along each MamK strand most closely resemble those of eukaryotic actin. In contrast, the cross-strand interface, with a surprisingly limited set of contacts, is novel among actin homologs and gives rise to the nonstaggered architecture.
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