2QVS

Crystal Structure of Type IIa Holoenzyme of cAMP-dependent Protein Kinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

PKA type IIalpha holoenzyme reveals a combinatorial strategy for isoform diversity.

Wu, J.Brown, S.H.J.von Daake, S.Taylor, S.S.

(2007) Science 318: 274-279

  • DOI: 10.1126/science.1146447
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The catalytic (C) subunit of cyclic adenosine monophosphate (cAMP)-dependent protein kinase (PKA) is inhibited by two classes of regulatory subunits, RI and RII. The RII subunits are substrates as well as inhibitors and do not require adenosine triph ...

    The catalytic (C) subunit of cyclic adenosine monophosphate (cAMP)-dependent protein kinase (PKA) is inhibited by two classes of regulatory subunits, RI and RII. The RII subunits are substrates as well as inhibitors and do not require adenosine triphosphate (ATP) to form holoenzyme, which distinguishes them from RI subunits. To understand the molecular basis for isoform diversity, we solved the crystal structure of an RIIalpha holoenzyme and compared it to the RIalpha holoenzyme. Unphosphorylated RIIalpha(90-400), a deletion mutant, undergoes major conformational changes as both of the cAMP-binding domains wrap around the C subunit's large lobe. The hallmark of this conformational reorganization is the helix switch in domain A. The C subunit is in an open conformation, and its carboxyl-terminal tail is disordered. This structure demonstrates the conserved and isoform-specific features of RI and RII and the importance of ATP, and also provides a new paradigm for designing isoform-specific activators or antagonists for PKA.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase, alpha-catalytic subunitE350Mus musculusMutation(s): 0 
Gene Names: PrkacaPkaca
EC: 2.7.11.11
Find proteins for P05132 (Mus musculus)
Explore P05132 
Go to UniProtKB:  P05132
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase type II-alpha regulatory subunitB310Mus musculusMutation(s): 0 
Gene Names: Prkar2a
Find proteins for P12367 (Mus musculus)
Explore P12367 
Go to UniProtKB:  P12367
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
EL-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
EL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.9α = 90
b = 92.9β = 90
c = 118γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
AMoREphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance