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- W2170868227 abstract "Summary In eukaryotic and bacterial cells, spatial organization is dependent upon cytoskeletal filaments. Actin is a main eukaryotic cytoskeletal element, involved in key processes such as cell shape determination, mechanical force generation and cytokinesis. We describe an archaeal cytoskeleton which forms helical structures within Pyrobaculum calidifontis cells, as shown by in situ immunostaining. The core components include an archaeal actin homologue, Crenactin, closely related to the eukaryotic counterpart. The crenactin gene belongs to a conserved gene cluster denoted Arcade ( a ctin‐ r elated c ytoskeleton in A rchaea involved in shape de termination). The phylogenetic distribution of arcade genes is restricted to the crenarchaeal Thermoproteales lineage, and to Korarchaeota, and correlates with rod‐shaped and filamentous cell morphologies. Whereas Arcadin‐1, ‐3 and ‐4 form helical structures, suggesting cytoskeleton‐associated functions, Arcadin‐2 was found to be localized between segregated nucleoids in a cell subpopulation, in agreement with possible involvement in cytokinesis. The results support a crenarchaeal origin of the eukaryotic actin cytoskeleton and, as such, have implications for theories concerning the origin of the eukaryotic cell." @default.
- W2170868227 created "2016-06-24" @default.
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- W2170868227 date "2011-04-06" @default.
- W2170868227 modified "2023-10-16" @default.
- W2170868227 title "An actin-based cytoskeleton in archaea" @default.
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- W2170868227 doi "https://doi.org/10.1111/j.1365-2958.2011.07635.x" @default.
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