Cytoskeleton Flashcards
(25 cards)
Forms cell-surface projections used for sensing and motoring
Actin
Commonly used as a motor with myosin
Actin
Responsible for the locomotion of the entire cell
Actin
Determines the cell surface shape
Actin
The filament that underlies the surface membrane
Actin
The subunit of Actin
G-Actin, a 375 amino acid polypeptide carrying ATP or ADP
Determines the position of organelles in the cell
Microtubule
Directs intracellular transport
Microtubule
Forms mitotic spindles for cell division
Microtubule
Functions for sensing and motoring by creating cilia
Microtubule
Can be found in the cytoplasmic array
Microtubule (and found in cilia but thats a giveaway)
The subunits of Microtubules are
alpha and beta tubulin, heterodimers each composed of 445-450 amino acids that stack together. beta has GTP, alpha has either GTP or GDP
Provides the mechanical strength
Intermediate Filament
Provides anchorage sites for chromosomes
Intermediate Filament
Holds the epithelial sheets together
Intermediate Filament
Can be found in nuclear lamins, the meshwork lining the inner membrane of the nuclear envelope
Intermediate Filament
Intermediate Filament subunits are
Non globular; repeated strands; no nucleotide so no structural polarity
Thymosin
Actin binding protein; Binds monomers to prevent filament formation
Profilin
Actin binding protein; Promotes filament formation
Filamin
Actin binding protein; Filament cross-linking and attaching to membranes (like Spectrin)
Spectrin
Actin binding protein; Filament cross-linking and attaching to membranes (like Filamin)
Kinesin
Microtubule Binding Protein; Induces disassembly
Katanin
Microtubule Binding Protein; severs microtubules
+TIPS
Microtubule Binding Protein; Associated with plus ends and can link them to other structures
