2COL

Crystal structure analysis of CyaA/C-Cam with Pyrophosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for the interaction of Bordetella pertussis adenylyl cyclase toxin with calmodulin

Guo, Q.Shen, Y.Lee, Y.S.Gibbs, C.S.Mrksich, M.Tang, W.J.

(2005) Embo J. 24: 3190-3201

  • DOI: 10.1038/sj.emboj.7600800
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CyaA is crucial for colonization by Bordetella pertussis, the etiologic agent of whooping cough. Here we report crystal structures of the adenylyl cyclase domain (ACD) of CyaA with the C-terminal domain of calmodulin. Four discrete regions of CyaA bi ...

    CyaA is crucial for colonization by Bordetella pertussis, the etiologic agent of whooping cough. Here we report crystal structures of the adenylyl cyclase domain (ACD) of CyaA with the C-terminal domain of calmodulin. Four discrete regions of CyaA bind calcium-loaded calmodulin with a large buried contact surface. Of those, a tryptophan residue (W242) at an alpha-helix of CyaA makes extensive contacts with the calcium-induced, hydrophobic pocket of calmodulin. Mutagenic analyses show that all four regions of CyaA contribute to calmodulin binding and the calmodulin-induced conformational change of CyaA is crucial for catalytic activation. A crystal structure of CyaA-calmodulin with adefovir diphosphate, the metabolite of an approved antiviral drug, reveals the location of catalytic site of CyaA and how adefovir diphosphate tightly binds CyaA. The ACD of CyaA shares a similar structure and mechanism of activation with anthrax edema factor (EF). However, the interactions of CyaA with calmodulin completely diverge from those of EF. This provides molecular details of how two structurally homologous bacterial toxins evolved divergently to bind calmodulin, an evolutionarily conserved calcium sensor.


    Organizational Affiliation

    Ben-May Institute for Cancer Research, The University of Chicago, Chicago, IL 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bifunctional hemolysin-adenylate cyclase
A
356Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251)Mutation(s): 0 
Gene Names: cya (cyaA)
Find proteins for P0DKX7 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Go to UniProtKB:  P0DKX7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
B
67Xenopus laevisMutation(s): 0 
Gene Names: calm2-a
Find proteins for P0DP34 (Xenopus laevis)
Go to UniProtKB:  P0DP34
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
POP
Query on POP

Download SDF File 
Download CCD File 
A
PYROPHOSPHATE 2-
H2 O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.240 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 79.613α = 90.00
b = 79.613β = 90.00
c = 139.465γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance