Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 75.96 kDa 
• Atom Count: 5056 
• Residue Count: 623 
• Unique protein chains: 2

2QVS

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

• DOI: 10.2210/pdb2QVS/pdb

• Classification: transferase/transferase regulator
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-08-08 Released: 2007-10-23 
• Deposition Author(s): Wu, J., Brown, S.H.J., von Daake, S., Taylor, S.S.

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Experimental Data Snapshot

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

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

• PubMed: 17932298 
• DOI: 10.1126/science.1146447
• Primary Citation of Related Structures:  
  2QVS


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
cAMP-dependent protein kinase, alpha-catalytic subunit	E	350	Mus musculus	Mutation(s): 0  Gene Names: Prkaca, Pkaca EC: 2.7.11.11
Find proteins for P05132 (Mus musculus) Explore P05132  Go to UniProtKB:  P05132

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
cAMP-dependent protein kinase type II-alpha regulatory subunit	B	310	Mus musculus	Mutation(s): 0  Gene Names: Prkar2a
Find proteins for P12367 (Mus musculus) Explore P12367  Go to UniProtKB:  P12367

Small Molecules

Modified Residues  2 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	E	L-PEPTIDE LINKING	C3 H8 N O6 P		SER
TPO	E	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

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 = 87.9	α = 90
b = 92.9	β = 90
c = 118	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-08-08 
• Released Date: 2007-10-23 
Deposition Author(s): Wu, J., Brown, S.H.J., von Daake, S., Taylor, S.S.

Revision History 

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