5KBF

cAMP bound PfPKA-R (141-441)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Disrupting the Allosteric Interaction between the Plasmodium falciparum cAMP-dependent Kinase and Its Regulatory Subunit.

Littler, D.R.Bullen, H.E.Harvey, K.L.Beddoe, T.Crabb, B.S.Rossjohn, J.Gilson, P.R.

(2016) J. Biol. Chem. 291: 25375-25386

  • DOI: 10.1074/jbc.M116.750174
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The ubiquitous second messenger cAMP mediates signal transduction processes in the malarial parasite that regulate host erythrocyte invasion and the proliferation of merozoites. In Plasmodium falciparum, the central receptor for cAMP is the single re ...

    The ubiquitous second messenger cAMP mediates signal transduction processes in the malarial parasite that regulate host erythrocyte invasion and the proliferation of merozoites. In Plasmodium falciparum, the central receptor for cAMP is the single regulatory subunit (R) of protein kinase A (PKA). To aid the development of compounds that can selectively dysregulate parasite PKA signaling, we solved the structure of the PKA regulatory subunit in complex with cAMP and a related analogue that displays antimalarial activity, (S p )-2-Cl-cAMPS. Prior to signaling, PKA-R holds the kinase's catalytic subunit (C) in an inactive state by exerting an allosteric inhibitory effect. When two cAMP molecules bind to PKA-R, they stabilize a structural conformation that facilitates its dissociation, freeing PKA-C to phosphorylate downstream substrates such as apical membrane antigen 1. Although PKA activity was known to be necessary for erythrocytic proliferation, we show that uncontrolled induction of PKA activity using membrane-permeable agonists is equally disruptive to growth.


    Organizational Affiliation

    the Centre for AgriBioscience, La Trobe University, Bundoora, Victoria 3086, Australia, and.,the Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN Wales, United Kingdom.,the Burnet Institute, Melbourne, Victoria 3004, Australia.,the Department of Microbiology and Immunology, University of Melbourne, Melbourne, Victoria 3010, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.,From the Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, and.,From the Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, and paul.gilson@burnet.edu.au.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CAMP-dependent protein kinase regulatory subunit, putative
A, B
301Plasmodium falciparum (isolate 3D7)Mutation(s): 0 
EC: 2.7.11.11
Find proteins for Q7KQK0 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q7KQK0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CMP
Query on CMP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE
CYCLIC AMP; CAMP
C10 H12 N5 O6 P
IVOMOUWHDPKRLL-KQYNXXCUSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CMPKd: 1.2 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.245 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 78.726α = 90.00
b = 103.797β = 90.00
c = 104.236γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (Australia)Australia--

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2016-10-26
    Type: Database references
  • Version 1.2: 2016-12-14
    Type: Database references, Other
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Data collection