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- W2891454365 abstract "Septins are a conserved family of GTPases that associate with numerous components of the cytoskeleton and the inner leaflet of the plasma membrane. These proteins are involved in many biological processes, including cell division and membrane trafficking, and serving as a scaffolding component of the cytoskeleton used to recruit other proteins and form diffusion barriers to maintain the composition of membrane domains. In order to carry out their cellular functions, septins undergo interactions via their NC or G interfaces to form heteromeric rod-like structures that can polymerize into filaments and associate laterally into bundles. While electron microscopy studies of affinity-tagged and purified Saccharomyces cerevisiae septin complexes have provided evidence for this periodic organization and in-registry lateral bundling in vitro, the in-vivo arrangement of stress fiber-associated septin bundles in mammalian cells remains poorly characterized. We report here on a direct stochastic optical reconstruction microscopy and photoactivated localization microscopy study of the 2D spatial distribution of septins in mammalian cells. From simulated and experimental results, we show the effects of labeling method, labeling efficiency, and fluorescent emitter photophysics on image reconstruction and interpretation. Our experimental results are consistent with septin organization by polymerization of hetero-octamers and an approximate 30-35 nm periodicity between subsequent units of SEPT2-SEPT2 or SEPT9-SEPT9." @default.
- W2891454365 created "2018-09-27" @default.
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- W2891454365 date "2018-09-19" @default.
- W2891454365 modified "2023-10-12" @default.
- W2891454365 title "Single‐molecule localization microscopy of septin bundles in mammalian cells" @default.
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- W2891454365 doi "https://doi.org/10.1002/cm.21481" @default.
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