5CRH

Human skeletal calsequestrin, M53T mutant high-calcium complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Characterization of Two Human Skeletal Calsequestrin Mutants Implicated in Malignant Hyperthermia and Vacuolar Aggregate Myopathy.

Lewis, K.M.Ronish, L.A.Rios, E.Kang, C.

(2015) J Biol Chem 290: 28665-28674

  • DOI: https://doi.org/10.1074/jbc.M115.686261
  • Primary Citation of Related Structures:  
    5CRD, 5CRE, 5CRG, 5CRH

  • PubMed Abstract: 

    Calsequestrin 1 is the principal Ca(2+) storage protein of the sarcoplasmic reticulum of skeletal muscle. Its inheritable D244G mutation causes a myopathy with vacuolar aggregates, whereas its M87T "variant" is weakly associated with malignant hyperthermia. We characterized the consequences of these mutations with studies of the human proteins in vitro. Equilibrium dialysis and turbidity measurements showed that D244G and, to a lesser extent, M87T partially lose Ca(2+) binding exhibited by wild type calsequestrin 1 at high Ca(2+) concentrations. D244G aggregates abruptly and abnormally, a property that fully explains the protein inclusions that characterize its phenotype. D244G crystallized in low Ca(2+) concentrations lacks two Ca(2+) ions normally present in wild type that weakens the hydrophobic core of Domain II. D244G crystallized in high Ca(2+) concentrations regains its missing ions and Domain II order but shows a novel dimeric interaction. The M87T mutation causes a major shift of the α-helix bearing the mutated residue, significantly weakening the back-to-back interface essential for tetramerization. D244G exhibited the more severe structural and biophysical property changes, which matches the different pathophysiological impacts of these mutations.


  • Organizational Affiliation

    From the Department of Chemistry, Washington State University, Pullman, Washington 99164-4630.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calsequestrin-1
A, B
362Homo sapiensMutation(s): 1 
Gene Names: CASQ1CASQ
UniProt & NIH Common Fund Data Resources
Find proteins for P31415 (Homo sapiens)
Explore P31415 
Go to UniProtKB:  P31415
PHAROS:  P31415
GTEx:  ENSG00000143318 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31415
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
AA [auth B]
BA [auth B]
C [auth A]
CA [auth B]
D [auth A]
AA [auth B],
BA [auth B],
C [auth A],
CA [auth B],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
N [auth A],
O [auth A],
P [auth A],
Q [auth A],
R [auth A],
S [auth A],
T [auth A],
U [auth A],
V [auth B],
W [auth B],
X [auth B],
Y [auth B],
Z [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.681α = 90
b = 68.553β = 92.84
c = 99.262γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
Cootmodel building
PHENIXphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R01GM11125401
M.J. Murdock Charitable TrustUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2015-10-07
    Type: Initial release
  • Version 1.1: 2015-10-28
    Changes: Database references
  • Version 1.2: 2015-12-09
    Changes: Database references
  • Version 1.3: 2017-09-20
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.4: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description