1T5S

Structure of the (SR)Ca2+-ATPase Ca2-E1-AMPPCP form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Phosphoryl transfer and calcium ion occlusion in the calcium pump.

Sorensen, T.L.-M.Moller, J.V.Nissen, P.

(2004) Science 304: 1672-1675

  • DOI: https://doi.org/10.1126/science.1099366
  • Primary Citation of Related Structures:  
    1T5S, 1T5T

  • PubMed Abstract: 

    A tight coupling between adenosine triphosphate (ATP) hydrolysis and vectorial ion transport has to be maintained by ATP-consuming ion pumps. We report two crystal structures of Ca2+-bound sarco(endo)plasmic reticulum Ca2+-adenosine triphosphatase (SERCA) at 2.6 and 2.9 angstrom resolution in complex with (i) a nonhydrolyzable ATP analog [adenosine (beta-gamma methylene)-triphosphate] and (ii) adenosine diphosphate plus aluminum fluoride. SERCA reacts with ATP by an associative mechanism mediated by two Mg2+ ions to form an aspartyl-phosphorylated intermediate state (Ca2-E1 approximately P). The conformational changes that accompany the reaction with ATP pull the transmembrane helices 1 and 2 and close a cytosolic entrance for Ca2+, thereby preventing backflow before Ca2+ is released on the other side of the membrane.


  • Organizational Affiliation

    Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, DK-8000 Aarhus C, Denmark.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sarcoplasmic/endoplasmic reticulum calcium ATPase 1 isoform SERCA1a994Oryctolagus cuniculusMutation(s): 0 
EC: 3.6.3.8 (PDB Primary Data), 7.2.2.10 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P04191 (Oryctolagus cuniculus)
Explore P04191 
Go to UniProtKB:  P04191
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04191
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 162.439α = 90
b = 76.259β = 108.7
c = 151.164γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations