Dr._Wilson_Set_3_1A.09

Dr._Wilson_Set_3_1A.09 - The Cytoskeleton A Network of...

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The Cytoskeleton A Network of skeletal Fbers that can change its shape ±unctions: cell structure and movement
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The Cytoskeleton A Network of Skeletal Fibers that can Change its Shape Functions: Cell Structure and Movement The three main kinds of ±bers are: Actin ±laments (~ 7 nm diameter) Made of the protein, actin
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The Cytoskeleton A Network of Skeletal Fibers that is Constantly Changing its Shape Functions: Cell Structure and Movement The three main kinds of ±bers are: Actin ±laments (7 nm diameter) Microtubules (25 nm diameter) Made of the protein tubulin (a dimer- two monomers held together non- covalently)
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The Cytoskeleton A Network of Skeletal Fibers that is Constantly Changing its Shape Functions: Cell Structure and Movement The three main kinds of ±bers are: Actin ±laments (7 nm diameter) Microtubules (25 nm diameter) Intermediate ±laments (10 nm diameter) Made of many different proteins-but the same structure
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Actin Filaments
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Important Properties of Actin Filaments They polymerize (self assemble) by non-covalent, reversible, addition of actin monomers at the ends of the ±laments
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Some Important Properties of Actin Filaments They polymerize (self assemble) by noncovalent, reversible, addition of actin monomers at the ends of the ±laments • ATP is hydrolyzed, causing a special type of dynamic activity called treadmilling (assembly at one end of the ±lament (the so-called plus end) and disassembly at the opposite end (the minus end)----the two ends have different assembly properties •The ends do not have different charges!!
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Dr._Wilson_Set_3_1A.09 - The Cytoskeleton A Network of...

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