The Cytoskeleton
Branched Actin Network:
Formin-nucleated linear filaments:
Contractile Bundles:
Cytoskeletal system | Nucleotide | What it controls | Biological effect |
|---|---|---|---|
Actin filaments | ATP | Stability of subunits (ATP vs ADP) | Treadmilling, rapid turnover, protrusion |
Microtubules | GTP | Stability of plus end (GTP cap) | Dynamic instability, search‑and‑capture |
Myosin motors | ATP | Binding, release, power stroke | Muscle contraction, cell migration |
Kinesin/dynein | ATP | Stepping along MTs | Organelle transport, spindle function |
Intermediate filaments | None | — | High tensile strength |