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9 Cards in this Set
- Front
- Back
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functions of the cytoskeleton
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signalling, intrinsic support, movement
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types of cytoskeletal filaments
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microtubules, 25nm diameter
intermediate filament, ca10 nm microfilaments, ca 7nm |
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Microtubules, structure
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alfa & beta TUBULIN form profilaments, 13 parallel profilaments form hollow tubes
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Microtubules, function
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mitotic spindle
flagella, cilia - 9 parallel microtubules around one central pair. motor protein: dynein |
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motor proteins on microtubules
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dynein, moves towards - end
myosin, moves towards + end |
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intermediate filaments, structure
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C-end, N-end, alfa-helical region
monomers coil parallel -> dimers Dimers coil antiparallel -> tetramers. Polymers of tertramers form a fiber 8fibers twisted around like a rope makes a intermediate filament |
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intermediate filaments, function
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nuclear lamina
in the cytoplasm, forms "the real skeleton" keratins (epithelial tissue) vimentin (ConnTissue), desmin(muscles) |
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Microfilaments, structure
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polymers of the globular protein ACTIN- form a double helix
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microfilments, function
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microvilli (expand cell-surface, brush border)
cell cortex (attached to the inner face of plasma membrane, mechanical support) contractile ring (cell division) |
