5KN3

Recombinant bovine skeletal calsequestrin, low-Ca2+ form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Characterization of Post-Translational Modifications to Calsequestrins of Cardiac and Skeletal Muscle.

Lewis, K.M.Munske, G.R.Byrd, S.S.Kang, J.Cho, H.J.Rios, E.Kang, C.

(2016) Int J Mol Sci 17

  • DOI: https://doi.org/10.3390/ijms17091539
  • Primary Citation of Related Structures:  
    5KN0, 5KN1, 5KN2, 5KN3

  • PubMed Abstract: 

    Calsequestrin is glycosylated and phosphorylated during its transit to its final destination in the junctional sarcoplasmic reticulum. To determine the significance and universal profile of these post-translational modifications to mammalian calsequestrin, we characterized, via mass spectrometry, the glycosylation and phosphorylation of skeletal muscle calsequestrin from cattle (B. taurus), lab mice (M. musculus) and lab rats (R. norvegicus) and cardiac muscle calsequestrin from cattle, lab rats and humans. On average, glycosylation of skeletal calsequestrin consisted of two N-acetylglucosamines and one mannose (GlcNAc₂Man₁), while cardiac calsequestrin had five additional mannoses (GlcNAc₂Man₆). Skeletal calsequestrin was not phosphorylated, while the C-terminal tails of cardiac calsequestrin contained between zero to two phosphoryls, indicating that phosphorylation of cardiac calsequestrin may be heterogeneous in vivo. Static light scattering experiments showed that the Ca(2+)-dependent polymerization capabilities of native bovine skeletal calsequestrin are enhanced, relative to the non-glycosylated, recombinant isoform, which our crystallographic studies suggest may be due to glycosylation providing a dynamic "guiderail"-like scaffold for calsequestrin polymerization. Glycosylation likely increases a polymerization/depolymerization response to changing Ca(2+) concentrations, and proper glycosylation, in turn, guarantees both effective Ca(2+) storage/buffering of the sarcoplasmic reticulum and localization of calsequestrin (Casq) at its target site.


  • Organizational Affiliation

    Department of Chemistry, Washington State University, Pullman, WA 99164, USA. kevin_lewis@wsu.edu.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calsequestrin361Bos taurusMutation(s): 0 
Gene Names: casq1CASQ1
UniProt
Find proteins for Q05JF3 (Bos taurus)
Explore Q05JF3 
Go to UniProtKB:  Q05JF3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05JF3
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download Ideal Coordinates CCD File 
H [auth A],
I [auth A],
J [auth A]
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
MRD
Query on MRD

Download Ideal Coordinates CCD File 
G [auth A](4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A],
D [auth A],
E [auth A],
F [auth A]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.393α = 90
b = 146.06β = 90
c = 110.34γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

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: 2016-10-05
    Type: Initial release
  • Version 1.1: 2017-09-27
    Changes: Author supporting evidence, Derived calculations
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description