3LL8

Crystal Structure of Calcineurin in Complex with AKAP79 Peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Balanced interactions of calcineurin with AKAP79 regulate Ca(2+)-calcineurin-NFAT signaling.

Li, H.Pink, M.D.Murphy, J.G.Stein, A.Dell'acqua, M.L.Hogan, P.G.

(2012) Nat Struct Mol Biol 19: 337-345

  • DOI: 10.1038/nsmb.2238
  • Primary Citation of Related Structures:  
    3LL8

  • PubMed Abstract: 
  • In hippocampal neurons, the scaffold protein AKAP79 recruits the phosphatase calcineurin to L-type Ca(2+) channels and couples Ca(2+) influx to activation of calcineurin and of its substrate, the transcription factor NFAT. Here we show that an IAIIIT anc ...

    In hippocampal neurons, the scaffold protein AKAP79 recruits the phosphatase calcineurin to L-type Ca(2+) channels and couples Ca(2+) influx to activation of calcineurin and of its substrate, the transcription factor NFAT. Here we show that an IAIIIT anchoring site in human AKAP79 binds the same surface of calcineurin as the PxIxIT recognition peptide of NFAT, albeit more strongly. A modest decrease in calcineurin-AKAP affinity due to an altered anchoring sequence is compatible with NFAT activation, whereas a further decrease impairs activation. Counterintuitively, increasing calcineurin-AKAP affinity increases recruitment of calcineurin to the scaffold but impairs NFAT activation; this is probably due to both slower release of active calcineurin from the scaffold and sequestration of active calcineurin by 'decoy' AKAP sites. We propose that calcineurin-AKAP79 scaffolding promotes NFAT signaling by balancing strong recruitment of calcineurin with its efficient release to communicate with NFAT.


    Related Citations: 
    • Crystal structures of human calcineurin and the human FKBP12-FK506-calcineurin complex
      Kissinger, C.R., Parge, H.E., Knighton, D.R., Lewis, C.T., Pelletier, L.A., Tempczyk, A., Kalish, V.J., Tucker, K.D., Showalter, R.E., Moomaw, E.W., Gastinel, L.N., Habuka, N., Chen, X., Maldonado, F., Barker, J.E., Bacquet, R., Villafranca, J.E.
      (1995) Nature 378: 641
    • Structure of calcineurin in complex with PVIVIT peptide: portrait of a low-affinity signalling interaction
      Li, H., Zhang, L., Rao, A., Harrison, S.C., Hogan, P.G.
      (2007) J Mol Biol 369: 1296

    Organizational Affiliation

    Immune Disease Institute and Program in Cellular and Molecular Medicine, Children's Hospital, Boston, Massachusetts, USA.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AKAP79 peptide E11Homo sapiensMutation(s): 0 
Gene Names: AKAP5AKAP79
Find proteins for P24588 (Homo sapiens)
Explore P24588 
Go to UniProtKB:  P24588
NIH Common Fund Data Resources
PHAROS:  P24588
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform AC357Homo sapiensMutation(s): 0 
Gene Names: PPP3CACALNACNA
EC: 3.1.3.16
Find proteins for Q08209 (Homo sapiens)
Explore Q08209 
Go to UniProtKB:  Q08209
NIH Common Fund Data Resources
PHAROS:  Q08209
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Calcineurin subunit B type 1 BD155Homo sapiensMutation(s): 0 
Gene Names: PPP3R1CNA2CNB
Find proteins for P63098 (Homo sapiens)
Explore P63098 
Go to UniProtKB:  P63098
NIH Common Fund Data Resources
PHAROS:  P63098
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.275α = 90
b = 89.699β = 90
c = 158.914γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2010-01-28 
  • Released Date: 2011-01-12 
  • Deposition Author(s): Li, H., Hogan, P.G.

Revision History 

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-03-21
    Changes: Database references
  • Version 1.3: 2017-11-01
    Changes: Advisory, Refinement description