1LIN

CALMODULIN COMPLEXED WITH TRIFLUOPERAZINE (1:4 COMPLEX)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 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.Mol.Biol. 1: 795-801

  • Also Cited By: 1QIV, 1QIW

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
A
148Bos taurusGene Names: CALM (CAM)
Find proteins for P62157 (Bos taurus)
Go to UniProtKB:  P62157
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
TFP
Query on TFP

Download SDF File 
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
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TFPKd: 1000 - 5000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.220 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 40.660α = 90.00
b = 40.660β = 90.00
c = 177.400γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
PROCORdata reduction
X-PLORphasing
X-PLORmodel building
MADNESdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance