7UDT

cryo-EM structure of the rigor state wild type myosin-15-F-actin complex (symmetry expansion and re-centering)

  • Classification: MOTOR PROTEIN
  • Organism(s): Gallus gallus, Mus musculus
  • Expression System: Insect cell expression vector pTIE1
  • Mutation(s): No 

  • Deposited: 2022-03-20 Released: 2022-08-03 
  • Deposition Author(s): Gong, R., Reynolds, M.J., Alushin, G.M.
  • Funding Organization(s): National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute on Deafness and Other Communication Disorders (NIH/NIDCD)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.17 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis for tunable control of actin dynamics by myosin-15 in mechanosensory stereocilia.

Gong, R.Jiang, F.Moreland, Z.G.Reynolds, M.J.de Los Reyes, S.E.Gurel, P.Shams, A.Heidings, J.B.Bowl, M.R.Bird, J.E.Alushin, G.M.

(2022) Sci Adv 8: eabl4733-eabl4733

  • DOI: 10.1126/sciadv.abl4733
  • Primary Citation of Related Structures:  
    7R8V, 7R91, 7RB8, 7RB9, 7UDT, 7UDU

  • PubMed Abstract: 
  • The motor protein myosin-15 is necessary for the development and maintenance of mechanosensory stereocilia, and mutations in myosin-15 cause hereditary deafness. In addition to transporting actin regulatory machinery to stereocilia tips, myosin-15 directly nucleates actin filament ("F-actin") assembly, which is disrupted by a progressive hearing loss mutation (p ...

    The motor protein myosin-15 is necessary for the development and maintenance of mechanosensory stereocilia, and mutations in myosin-15 cause hereditary deafness. In addition to transporting actin regulatory machinery to stereocilia tips, myosin-15 directly nucleates actin filament ("F-actin") assembly, which is disrupted by a progressive hearing loss mutation (p.D1647G, " jordan "). Here, we present cryo-electron microscopy structures of myosin-15 bound to F-actin, providing a framework for interpreting the impacts of deafness mutations on motor activity and actin nucleation. Rigor myosin-15 evokes conformational changes in F-actin yet maintains flexibility in actin's D-loop, which mediates inter-subunit contacts, while the jordan mutant locks the D-loop in a single conformation. Adenosine diphosphate-bound myosin-15 also locks the D-loop, which correspondingly blunts actin-polymerization stimulation. We propose myosin-15 enhances polymerization by bridging actin protomers, regulating nucleation efficiency by modulating actin's structural plasticity in a myosin nucleotide state-dependent manner. This tunable regulation of actin polymerization could be harnessed to precisely control stereocilium height.


    Organizational Affiliation

    Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, New York, NY, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
regulatory light chainA [auth G]146Gallus gallusMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Actin, alpha skeletal muscleB [auth A],
C [auth B],
D [auth C]
373Gallus gallusMutation(s): 0 
Gene Names: ACTA1ACTA
UniProt
Find proteins for P68139 (Gallus gallus)
Explore P68139 
Go to UniProtKB:  P68139
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UniProt GroupP68139
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Unconventional myosin-XVE [auth D]719Mus musculusMutation(s): 0 
Gene Names: Myo15aMyo15
UniProt & NIH Common Fund Data Resources
Find proteins for Q9QZZ4 (Mus musculus)
Explore Q9QZZ4 
Go to UniProtKB:  Q9QZZ4
IMPC:  MGI:1261811
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UniProt GroupQ9QZZ4
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HIC
Query on HIC
B [auth A],
C [auth B],
D [auth C]
L-PEPTIDE LINKINGC7 H11 N3 O2HIS
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.17 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)United StatesDP5OD017885
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM141044
National Institutes of Health/National Institute on Deafness and Other Communication Disorders (NIH/NIDCD)United StatesR01DC018827

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-03
    Type: Initial release