4IAK

Low temperature X-ray structure of cAMP dependent protein kinase A in complex with high Sr2+ concentration, ADP and phosphorylated peptide pSP20


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Insights into the Phosphoryl Transfer Catalyzed by cAMP-Dependent Protein Kinase: An X-ray Crystallographic Study of Complexes with Various Metals and Peptide Substrate SP20.

Gerlits, O.Waltman, M.J.Taylor, S.Langan, P.Kovalevsky, A.

(2013) Biochemistry 52: 3721-3727

  • DOI: 10.1021/bi400066a
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • X-ray structures of several ternary substrate and product complexes of the catalytic subunit of cAMP-dependent protein kinase (PKAc) have been determined with different bound metal ions. In the PKAc complexes, Mg(2+), Ca(2+), Sr(2+), and Ba(2+) metal ...

    X-ray structures of several ternary substrate and product complexes of the catalytic subunit of cAMP-dependent protein kinase (PKAc) have been determined with different bound metal ions. In the PKAc complexes, Mg(2+), Ca(2+), Sr(2+), and Ba(2+) metal ions could bind to the active site and facilitate the phosphoryl transfer reaction. ATP and a substrate peptide (SP20) were modified, and the reaction products ADP and the phosphorylated peptide were found trapped in the enzyme active site. Finally, we determined the structure of a pseudo-Michaelis complex containing Mg(2+), nonhydrolyzable AMP-PCP (β,γ-methyleneadenosine 5'-triphosphate) and SP20. The product structures together with the pseudo-Michaelis complex provide snapshots of different stages of the phosphorylation reaction. Comparison of these structures reveals conformational, coordination, and hydrogen bonding changes that might occur during the reaction and shed new light on its mechanism, roles of metals, and active site residues.


    Organizational Affiliation

    Bioscience Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87544, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase catalytic subunit alpha
A
356Mus musculusMutation(s): 0 
Gene Names: Prkaca (Pkaca)
EC: 2.7.11.11
Find proteins for P05132 (Mus musculus)
Go to UniProtKB:  P05132
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
phosphorylated pseudo-substrate peptide pSP20
S
20Homo sapiensMutation(s): 0 
Gene Names: PKIA (PRKACN1)
Find proteins for P61925 (Homo sapiens)
Go to Gene View: PKIA
Go to UniProtKB:  P61925
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CO3
Query on CO3

Download SDF File 
Download CCD File 
A
CARBONATE ION
C O3
BVKZGUZCCUSVTD-UHFFFAOYSA-L
 Ligand Interaction
SR
Query on SR

Download SDF File 
Download CCD File 
A
STRONTIUM ION
Sr
PWYYWQHXAPXYMF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, S
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.537α = 90.00
b = 78.924β = 90.00
c = 97.331γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling
SHELXL-97refinement
CNSrefinement
CNSphasing
HKL-3000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-12
    Type: Initial release
  • Version 1.1: 2013-12-18
    Type: Database references