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-Structure paper
Title | High-resolution structures of the actomyosin-V complex in three nucleotide states provide insights into the force generation mechanism. |
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Journal, issue, pages | Elife, Vol. 10, Year 2021 |
Publish date | Nov 23, 2021 |
Authors | Sabrina Pospich / H Lee Sweeney / Anne Houdusse / Stefan Raunser / |
PubMed Abstract | The molecular motor myosin undergoes a series of major structural transitions during its force-producing motor cycle. The underlying mechanism and its coupling to ATP hydrolysis and actin binding are ...The molecular motor myosin undergoes a series of major structural transitions during its force-producing motor cycle. The underlying mechanism and its coupling to ATP hydrolysis and actin binding are only partially understood, mostly due to sparse structural data on actin-bound states of myosin. Here, we report 26 high-resolution cryo-EM structures of the actomyosin-V complex in the strong-ADP, rigor, and a previously unseen post-rigor transition state that binds the ATP analog AppNHp. The structures reveal a high flexibility of myosin in each state and provide valuable insights into the structural transitions of myosin-V upon ADP release and binding of AppNHp, as well as the actomyosin interface. In addition, they show how myosin is able to specifically alter the structure of F-actin. |
External links | Elife / PubMed:34812732 / PubMed Central |
Methods | EM (helical sym.) |
Resolution | 2.9 - 3.7 Å |
Structure data | EMDB-13501, PDB-7plt: EMDB-13502, PDB-7plu: EMDB-13503, PDB-7plv: EMDB-13504, PDB-7plw: EMDB-13505, PDB-7plx: EMDB-13506, PDB-7ply: EMDB-13507, PDB-7plz: EMDB-13508, PDB-7pm0: EMDB-13509, PDB-7pm1: EMDB-13510, PDB-7pm2: EMDB-13511, PDB-7pm3: EMDB-13521, PDB-7pm5: EMDB-13522, PDB-7pm6: EMDB-13523, PDB-7pm7: EMDB-13524, PDB-7pm8: EMDB-13525, PDB-7pm9: EMDB-13526, PDB-7pma: EMDB-13527, PDB-7pmb: EMDB-13528, PDB-7pmc: EMDB-13529, PDB-7pmd: EMDB-13530, PDB-7pme: EMDB-13531, PDB-7pmf: EMDB-13532, PDB-7pmg: EMDB-13533, PDB-7pmh: EMDB-13535, PDB-7pmi: EMDB-13536, PDB-7pmj: EMDB-13538, PDB-7pml: |
Chemicals | ChemComp-ADP: ChemComp-MG: ChemComp-PO4: ChemComp-9UE: ChemComp-ANP: |
Source |
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Keywords | MOTOR PROTEIN / myosin / cytoskeleton / F-actin / phalloidin / jasplakinolide / STRUCTURAL PROTEIN |