Spectrin-based membrane skeleton is asymmetric and remodels during neural development
نویسندگان
چکیده
منابع مشابه
Drosophila spectrin: the membrane skeleton during embryogenesis
The distribution of alpha-spectrin in Drosophila embryos was determined by immunofluorescence using affinity-purified polyclonal or monoclonal antibodies. During early development, spectrin is concentrated near the inner surface of the plasma membrane, in cytoplasmic islands around the syncytial nuclei, and, at lower concentrations, throughout the remainder of the cytoplasm of preblastoderm emb...
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Megakaryocytes generate platelets by remodeling their cytoplasm first into proplatelets and then into preplatelets, which undergo fission to generate platelets. Although the functions of microtubules and actin during platelet biogenesis have been defined, the role of the spectrin cytoskeleton is unknown. We investigated the function of the spectrin-based membrane skeleton in proplatelet and pla...
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Introduction Among the processes of developing a polarized neuron from an undifferentiated neuronal precursor is the extension of neurites and their differentiation into dendrites and axons. The formation of synaptic contacts, myelin sheaths and nodes of Ranvier lends complexity to the surface of neurons. To generate such diversity and specialization of membrane domains a complex series of even...
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The origin of epithelial cell polarity during development is a fundamental problem in cell biology. Central to this process is the establishment of asymmetric membrane domains that will ultimately form the apical and basolateral surfaces. The spectrin-based membrane skeleton has long been thought to participate in the generation of this asymmetry. Drosophila melanogaster contains two known (bet...
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Actin, spectrin, and associated molecules form a membrane-associated periodic skeleton (MPS) in neurons. In the MPS, short actin filaments, capped by actin-capping proteins, form ring-like structures that wrap around the circumference of neurites, and these rings are periodically spaced along the neurite by spectrin tetramers, forming a quasi-1D lattice structure. This 1D MPS structure was init...
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ژورنال
عنوان ژورنال: Journal of Cell Science
سال: 2020
ISSN: 1477-9137,0021-9533
DOI: 10.1242/jcs.248583