7MF3

Structure of the autoinhibited state of smooth muscle myosin-2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: TISSUE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Cryo-EM structure of the autoinhibited state of myosin-2.

Heissler, S.M.Arora, A.S.Billington, N.Sellers, J.R.Chinthalapudi, K.

(2021) Sci Adv 7: eabk3273-eabk3273

  • DOI: 10.1126/sciadv.abk3273
  • Primary Citation of Related Structures:  
    7MF3

  • PubMed Abstract: 
  • We solved the near-atomic resolution structure of smooth muscle myosin-2 in the autoinhibited state (10 S ) using single-particle cryo–electron microscopy. The 3.4-Å structure reveals the precise molecular architecture of 10 S and the structural basis for myosin-2 regulation ...

    We solved the near-atomic resolution structure of smooth muscle myosin-2 in the autoinhibited state (10 S ) using single-particle cryo–electron microscopy. The 3.4-Å structure reveals the precise molecular architecture of 10 S and the structural basis for myosin-2 regulation. We reveal the position of the phosphorylation sites that control myosin autoinhibition and activation by phosphorylation of the regulatory light chain. Further, we present a previously unidentified conformational state in myosin-2 that traps ADP and P i produced by the hydrolysis of ATP in the active site. This noncanonical state represents a branch of the myosin enzyme cycle and explains the autoinhibition of the enzyme function of 10 S along with its reduced affinity for actin. Together, our structure defines the molecular mechanisms that drive 10 S formation, stabilization, and relief by phosphorylation of the regulatory light chain.


    Organizational Affiliation

    Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University College of Medicine, Columbus, OH, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin-11A, B, G, H1,978Gallus gallusMutation(s): 0 
Gene Names: MYH11
UniProt
Find proteins for P10587 (Gallus gallus)
Explore P10587 
Go to UniProtKB:  P10587
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UniProt GroupP10587
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin light polypeptide 6C, F150Gallus gallusMutation(s): 0 
Gene Names: MYL6
UniProt
Find proteins for P02607 (Gallus gallus)
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Go to UniProtKB:  P02607
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UniProt GroupP02607
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin regulatory light chain 2, smooth muscle major isoformD, E171Gallus gallusMutation(s): 0 
UniProt
Find proteins for P02612 (Gallus gallus)
Explore P02612 
Go to UniProtKB:  P02612
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UniProt GroupP02612
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: TISSUE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2022-01-05
    Type: Initial release