3TS5

Crystal Structure of a Light Chain Domain of Scallop Smooth Muscle Myosin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report



Literature

Crystal structure of a phosphorylated light chain domain of scallop smooth-muscle Myosin.

Senthil Kumar, V.S.O'Neall-Hennessey, E.Reshetnikova, L.Brown, J.H.Robinson, H.Szent-Gyorgyi, A.G.Cohen, C.

(2011) Biophys J 101: 2185-2189

  • DOI: 10.1016/j.bpj.2011.09.028
  • Primary Citation of Related Structures:  
    3TS5, 3TUY

  • PubMed Abstract: 
  • We have determined the crystal structure of a phosphorylated smooth-muscle myosin light chain domain (LCD). This reconstituted LCD is of a sea scallop catch muscle myosin with its phosphorylatable regulatory light chain (RLC SmoA). In the crystal str ...

    We have determined the crystal structure of a phosphorylated smooth-muscle myosin light chain domain (LCD). This reconstituted LCD is of a sea scallop catch muscle myosin with its phosphorylatable regulatory light chain (RLC SmoA). In the crystal structure, Arg(16), an arginine residue that is present in this isoform but not in vertebrate smooth-muscle RLC, stabilizes the phosphorylation site. This arginine interacts with the carbonyl group of the phosphorylation-site serine in the unphosphorylated LCD (determined previously), and with the phosphate group when the serine is phosphorylated. However, the overall conformation of the LCD is essentially unchanged upon phosphorylation. This result provides additional evidence that phosphorylation of the RLC is unlikely to act as an on-switch in regulation of scallop catch muscle myosin.


    Organizational Affiliation

    Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, Massachusetts, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin heavy chainA, D69Placopecten magellanicusMutation(s): 0 
Find proteins for Q26080 (Placopecten magellanicus)
Explore Q26080 
Go to UniProtKB:  Q26080
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin regulatory light chainB, E161Placopecten magellanicusMutation(s): 0 
Find proteins for Q26069 (Placopecten magellanicus)
Explore Q26069 
Go to UniProtKB:  Q26069
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin essential light chainC, F156Placopecten magellanicusMutation(s): 0 
Find proteins for Q26066 (Placopecten magellanicus)
Explore Q26066 
Go to UniProtKB:  Q26066
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
C, F
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
B, E
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.811α = 77.33
b = 68.775β = 85.99
c = 79.418γ = 73.65
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-23
    Type: Initial release