1LIN

CALMODULIN COMPLEXED WITH TRIFLUOPERAZINE (1:4 COMPLEX)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Trifluoperazine-induced conformational change in Ca(2+)-calmodulin.

Vandonselaar, M.Hickie, R.A.Quail, J.W.Delbaere, L.T.

(1994) Nat Struct Biol 1: 795-801

  • DOI: 10.1038/nsb1194-795
  • Primary Citation of Related Structures:  
    1LIN

  • PubMed Abstract: 
  • Here we show that, as a consequence of binding the drug trifluoperazine, a major conformational movement occurs in Ca(2+)-calmodulin (CaM). The tertiary structure changes from an elongated dumb-bell, with exposed hydrophobic surfaces, to a compact gl ...

    Here we show that, as a consequence of binding the drug trifluoperazine, a major conformational movement occurs in Ca(2+)-calmodulin (CaM). The tertiary structure changes from an elongated dumb-bell, with exposed hydrophobic surfaces, to a compact globular form which can no longer interact with its target enzymes. It is likely that inactivation of Ca(2+)-CaM by trifluoperazine is due to this major tertiary-structural alteration in Ca(2+)-CaM, which is initiated and stabilized by drug binding. This conformational change is similar to that which occurs on the binding of Ca(2+)-CaM to target peptides. Two hydrophobic binding pockets, created by amino acid residues adjacent to Ca(2+)-coordinating residues, form the key recognition sites on Ca(2+)-CaM for both inhibitors and target enzymes.


    Related Citations: 
    • Preliminary X-Ray Data for the Calmodulin(Slash)Trifluoperazine Complex
      Gehrig, L.M.B., Delbaere, L.T.J., Hickie, R.A.
      (1984) J Mol Biol 177: 559

    Organizational Affiliation

    Department of Biochemistry, University of Saskatchewan, Saskatoon, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CALMODULINA148Bos taurusMutation(s): 0 
Gene Names: CALMCAM
Find proteins for P62157 (Bos taurus)
Explore P62157 
Go to UniProtKB:  P62157
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TFP
Query on TFP

Download CCD File 
A
10-[3-(4-METHYL-PIPERAZIN-1-YL)-PROPYL]-2-TRIFLUOROMETHYL-10H-PHENOTHIAZINE
C21 H24 F3 N3 S
ZEWQUBUPAILYHI-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TFPKd:  5000   nM  BindingDB
TFPKd:  1000   nM  BindingDB
TFPKd:  3400   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.66α = 90
b = 40.66β = 90
c = 177.4γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
MADNESdata reduction
PROCORdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-18
    Changes: Data collection, Other