3BA6

Structure of the Ca2E1P phosphoenzyme intermediate of the SERCA Ca2+-ATPase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structural basis of calcium transport by the calcium pump.

Olesen, C.Picard, M.Winther, A.M.Gyrup, C.Morth, J.P.Oxvig, C.Moller, J.V.Nissen, P.

(2007) Nature 450: 1036-1042

  • DOI: 10.1038/nature06418
  • Primary Citation of Related Structures:  
  • Also Cited By: 3TLM

  • PubMed Abstract: 
  • The sarcoplasmic reticulum Ca2+-ATPase, a P-type ATPase, has a critical role in muscle function and metabolism. Here we present functional studies and three new crystal structures of the rabbit skeletal muscle Ca2+-ATPase, representing the phosphoenz ...

    The sarcoplasmic reticulum Ca2+-ATPase, a P-type ATPase, has a critical role in muscle function and metabolism. Here we present functional studies and three new crystal structures of the rabbit skeletal muscle Ca2+-ATPase, representing the phosphoenzyme intermediates associated with Ca2+ binding, Ca2+ translocation and dephosphorylation, that are based on complexes with a functional ATP analogue, beryllium fluoride and aluminium fluoride, respectively. The structures complete the cycle of nucleotide binding and cation transport of Ca2+-ATPase. Phosphorylation of the enzyme triggers the onset of a conformational change that leads to the opening of a luminal exit pathway defined by the transmembrane segments M1 through M6, which represent the canonical membrane domain of P-type pumps. Ca2+ release is promoted by translocation of the M4 helix, exposing Glu 309, Glu 771 and Asn 796 to the lumen. The mechanism explains how P-type ATPases are able to form the steep electrochemical gradients required for key functions in eukaryotic cells.


    Organizational Affiliation

    Centre for Membrane Pumps in Cells and Disease-PUMPKIN, Danish National Research Foundation, University of Aarhus, Ole Worms Alle, blg. 1185, DK - 8000 Aarhus C, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sarcoplasmic/endoplasmic reticulum calcium ATPase 1
A
994Oryctolagus cuniculusMutation(s): 0 
Gene Names: ATP2A1
EC: 7.2.2.10
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
P-type ATPase
Protein: 
Calcium ATPase; rabbit sarcoplasmic reticulum. E1 state with bound calcium
Find proteins for P04191 (Oryctolagus cuniculus)
Go to Gene View: ATP2A1
Go to UniProtKB:  P04191
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
AN2
Query on AN2

Download SDF File 
Download CCD File 
A
AMP PHOSPHORAMIDATE
C10 H16 N6 O9 P2
FQMDCEJHLOLKLI-KQYNXXCUSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PHD
Query on PHD
A
L-PEPTIDE LINKINGC4 H8 N O7 PASP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.210 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 162.510α = 90.00
b = 75.967β = 109.01
c = 152.407γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHASERphasing
HKL-2000data reduction
DNAdata collection
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description