2Y9E

Structural basis for the allosteric interference of myosin function by mutants G680A and G680V of Dictyostelium myosin-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.372 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.286 

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This is version 1.3 of the entry. See complete history


Literature

Structural Basis for the Allosteric Interference of Myosin Function by Reactive Thiol Region Mutations G680A and G680V.

Preller, M.Bauer, S.Adamek, N.Fujita-Becker, S.Fedorov, R.Geeves, M.A.Manstein, D.J.

(2011) J Biol Chem 286: 35051

  • DOI: https://doi.org/10.1074/jbc.M111.265298
  • Primary Citation of Related Structures:  
    2Y0R, 2Y8I, 2Y9E

  • PubMed Abstract: 

    The cold-sensitive single-residue mutation of glycine 680 in the reactive thiol region of Dictyostelium discoideum myosin-2 or the corresponding conserved glycine in other myosin isoforms has been reported to interfere with motor function. Here we present the x-ray structures of myosin motor domain mutants G680A in the absence and presence of nucleotide as well as the apo structure of mutant G680V. Our results show that the Gly-680 mutations lead to uncoupling of the reactive thiol region from the surrounding structural elements. Structural and functional data indicate that the mutations induce the preferential population of a state that resembles the ADP-bound state. Moreover, the Gly-680 mutants display greatly reduced dynamic properties, which appear to be related to the recovery of myosin motor function at elevated temperatures.


  • Organizational Affiliation

    Institut für Biophysikalische Chemie, Medizinische Hochschule Hannover, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MYOSIN-2A [auth X]758Dictyostelium discoideumMutation(s): 1 
EC: 3.6.4.1
UniProt
Find proteins for P08799 (Dictyostelium discoideum)
Explore P08799 
Go to UniProtKB:  P08799
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08799
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.372 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.286 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55α = 90
b = 105.8β = 90
c = 180.5γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2011-10-12
    Changes: Database references
  • Version 1.2: 2019-07-31
    Changes: Advisory, Data collection, Derived calculations
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Other, Refinement description