4J2T image
Entry Detail
PDB ID:
4J2T
Title:
Inhibitor-bound Ca2+ ATPase
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2013-02-05
Release Date:
2013-06-19
Method Details:
Experimental Method:
Resolution:
3.20 Å
R-Value Free:
0.28
R-Value Work:
0.26
R-Value Observed:
0.26
Space Group:
P 41 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:SERCA1a
Chain IDs:A
Chain Length:994
Number of Molecules:1
Biological Source:Oryctolagus cuniculus
Primary Citation
Water-mediated interactions influence the binding of thapsigargin to sarco/endoplasmic reticulum calcium adenosinetriphosphatase.
J.Med.Chem. 56 3609 3619 (2013)
PMID: 23574308 DOI: 10.1021/jm4001083

Abstact

A crystal structure suggests four water molecules are present in the binding cavity of thapsigargin in sarco/endoplasmic reticulum calcium ATPase (SERCA). Computational chemistry indicates that three of these water molecules mediate an extensive hydrogen-bonding network between thapsigargin and the backbone of SERCA. The orientation of the thapsigargin molecule in SERCA is crucially dependent on these interactions. The hypothesis has been verified by measuring the affinity of newly synthesized model compounds, which are prevented from participating in such water-mediated interactions as hydrogen-bond donors.

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Primary Citation of related structures