5KN2

Native bovine skeletal calsequestrin, high-Ca2+ form

  • Classification: METAL BINDING PROTEIN
  • Organism(s): Bos taurus

  • Deposited: 2016-06-27 Released: 2016-10-05 
  • Deposition Author(s): Lewis, K.M., Byrd, S.S., Kang, C.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences; M.J. Murdock Charitable Trust 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.601 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.3390/ijms17091539
  • Primary Citation of Related Structures:  

  • 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 calseque ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calsequestrin
A, B, C
361Bos taurusMutation(s): 0 
Gene Names: CASQ1 (casq1)
Find proteins for Q05JF3 (Bos taurus)
Go to Gene View: CASQ1
Go to UniProtKB:  Q05JF3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.601 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.205 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 130.363α = 90.00
b = 169.194β = 90.00
c = 155.477γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
PHENIXphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited States1R01GM11125401
M.J. Murdock Charitable TrustUnited States--

Revision History 

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Author supporting evidence, Derived calculations