1CTR

DRUG BINDING BY CALMODULIN: CRYSTAL STRUCTURE OF A CALMODULIN-TRIFLUOPERAZINE COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Drug binding by calmodulin: crystal structure of a calmodulin-trifluoperazine complex.

Cook, W.J.Walter, L.J.Walter, M.R.

(1994) Biochemistry 33: 15259-15265

  • DOI: 10.1021/bi00255a006
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The crystal structure of calmodulin (CaM) bound to trifluoperazine (TFP) has been determined and refined to a resolution of 2.45 A. Only one TFP is bound to CaM, but that is sufficient to cause distortion of the central alpha-helix and juxtaposition ...

    The crystal structure of calmodulin (CaM) bound to trifluoperazine (TFP) has been determined and refined to a resolution of 2.45 A. Only one TFP is bound to CaM, but that is sufficient to cause distortion of the central alpha-helix and juxtaposition of the N- and C-terminal domains similar to that seen in CaM-polypeptide complexes. The drug makes extensive contacts with residues in the C-terminal domain of CaM but only a few contacts with one residue in the N-terminal domain. The structure suggests that substrate binding to the C-terminal domain is sufficient to cause the conformational changes in calmodulin that lead to activation of its targets.


    Organizational Affiliation

    Department of Pathology, University of Alabama at Birmingham 35294.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
A
148Homo sapiensMutation(s): 0 
Gene Names: CALM1CALMCAMCAM1
Find proteins for P0DP23 (Homo sapiens)
Go to UniProtKB:  P0DP23
NIH Common Fund Data Resources
PHAROS  P0DP23
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
TFPKd :  1000   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41α = 90
b = 41β = 90
c = 178.9γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-12-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance