1SMH

Protein kinase A variant complex with completely ordered N-terminal helix


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.044 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Typically Disordered N-Terminus of PKA Can Fold as a Helix and Project the Myristoylation Site into Solution

Breitenlechner, C.Engh, R.A.Huber, R.Kinzel, V.Bossemeyer, D.Gassel, M.

(2004) Biochemistry 43: 7743-7749

  • DOI: 10.1021/bi0362525

  • PubMed Abstract: 
  • Protein kinases comprise the major enzyme family critically involved in signal transduction pathways; posttranslational modifications affect their regulation and determine signaling states. The prototype protein kinase A (PKA) possesses an N-terminal ...

    Protein kinases comprise the major enzyme family critically involved in signal transduction pathways; posttranslational modifications affect their regulation and determine signaling states. The prototype protein kinase A (PKA) possesses an N-terminal alpha-helix (Helix A) that is atypical for kinases and is thus a major distinguishing feature of PKA. Its physiological function may involve myristoylation at the N-terminus and modulation via phosphorylation at serine 10. Here we describe an unusual structure of an unmyristoylated PKA, unphosphorylated at serine 10, with a completely ordered N-terminus. Using standard conditions (e.g., PKI 5-24, ATP site ligand, MEGA-8), a novel 2-fold phosphorylated PKA variant showed the ordered N-terminus in a new crystal packing arrangement. Thus, the critical factor for structuring the N-terminus is apparently the absence of phosphorylation of Ser10. The flexibility of the N-terminus, its myristoylation, and the conformational dependence on the phosphorylation state are consistent with a functional role for myristoylation.


    Organizational Affiliation

    Abteilung Strukturforschung, Max-Planck-Institut fuer Biochemie, 82152 Martinsried, Germany. breitenl@biochem.mpg.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP-Dependent Protein Kinase, alpha-catalytic subunit
A
350Bos taurusMutations: L187F, M173L, A123V, E84Q
Gene Names: PRKACA
EC: 2.7.11.11
Find proteins for P00517 (Bos taurus)
Go to Gene View: PRKACA
Go to UniProtKB:  P00517
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase inhibitor, alpha form
B
20Oryctolagus cuniculusGene Names: PKIA (PRKACN1)
Find proteins for P61926 (Oryctolagus cuniculus)
Go to Gene View: PKIA
Go to UniProtKB:  P61926
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BU3
Query on BU3

Download SDF File 
Download CCD File 
A, B
(R,R)-2,3-BUTANEDIOL
C4 H10 O2
OWBTYPJTUOEWEK-QWWZWVQMSA-N
 Ligand Interaction
MG8
Query on MG8

Download SDF File 
Download CCD File 
A
N-OCTANOYL-N-METHYLGLUCAMINE
MEGA 8, N-(D-GLUCITYL)-N-METHYLOCTANAMIDE
C15 H31 N O6
SBWGZAXBCCNRTM-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A
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: 2.044 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 48.780α = 90.00
b = 79.431β = 90.00
c = 117.820γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling
AMoREphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-06
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance