3AGL

Complex of PKA with the bisubstrate protein kinase inhibitor ARC-1039


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Diversity of bisubstrate binding modes of adenosine analogue-oligoarginine conjugates in protein kinase a and implications for protein substrate interactions.

Pflug, A.Rogozina, J.Lavogina, D.Enkvist, E.Uri, A.Engh, R.A.Bossemeyer, D.

(2010) J Mol Biol 403: 66-77

  • DOI: https://doi.org/10.1016/j.jmb.2010.08.028
  • Primary Citation of Related Structures:  
    3AG9, 3AGL, 3AGM

  • PubMed Abstract: 

    Crystal structures of the catalytic subunit α of cAMP-dependent protein kinase (PKAc) with three adenosine analogue-oligoarginine conjugates (ARCs) are presented. The rationally designed ARCs include moieties that, in combination, target both the ATP- and the peptide-substrate-binding sites of PKAc, thereby taking advantage of high-affinity binding interactions offered by the ATP site while utilizing an additional mechanism for target specificity via binding to the peptide substrate site. The crystal structures demonstrate that, in accord with the previously reported bisubstrate character of ARCs, the inhibitors occupy both binding sites of PKAc. Further, they show new binding modes that may also apply to natural protein substrates of PKAc, which have not been revealed by previous crystallographic studies. The crystal structures described here contribute to the understanding of the substrate-binding patterns of PKAc and should also facilitate the design of inhibitors targeting PKAc and related protein kinases.


  • Organizational Affiliation

    Norwegian Structural Biology Centre, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway. Electronic address: alexander.pflug@uit.no.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cAMP-dependent protein kinase catalytic subunit alpha
A, B
351Homo sapiensMutation(s): 0 
Gene Names: PKACAPRKACA
EC: 2.7.11.11
UniProt & NIH Common Fund Data Resources
Find proteins for P17612 (Homo sapiens)
Explore P17612 
Go to UniProtKB:  P17612
PHAROS:  P17612
GTEx:  ENSG00000072062 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17612
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
A03
Query on A03

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
(10R,20R,23R)-1-[(2S,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]-20,23-bis(3-carbamimidamido propyl)-10-methyl-1,8,11,18,21-pentaoxo-2,9,12,19,22-pentaazatetracosan-24-amide
C37 H63 N17 O9
SOPDRJHPMMUFQM-ZUGNLIAKSA-N
Modified Residues  2 Unique
IDChains TypeFormula2D DiagramParent
SEP
Query on SEP
A, B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A, B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Binding Affinity Annotations 
IDSourceBinding Affinity
A03 PDBBind:  3AGL Ki: 16 (nM) from 1 assay(s)
Binding MOAD:  3AGL Ki: 16 (nM) from 1 assay(s)
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.18α = 90
b = 105.17β = 90
c = 106.47γ = 90
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-09-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2012-12-12
    Changes: Other
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary