5OK3

Crystal Structure of the Protein-Kinase A catalytic subunit from Criteculus Griseus in complex with compounds RKp241 and Fasudil


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.141 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Diamondoid Amino Acid-Based Peptide Kinase A Inhibitor Analogues.

Muller, J.Kirschner, R.A.Berndt, J.P.Wulsdorf, T.Metz, A.Hrdina, R.Schreiner, P.R.Geyer, A.Klebe, G.

(2019) ChemMedChem 14: 663-672

  • DOI: 10.1002/cmdc.201800779
  • Primary Citation of Related Structures:  
    5OK3

  • PubMed Abstract: 
  • The incorporation of diamondoid amino acids (DAAs) into peptide-like drugs is a general strategy to improve lipophilicity, membrane permeability, and metabolic stability of peptidomimetic pharmaceuticals. We designed and synthesized five novel peptidic DAA-containing kinase inhibitors of protein kinase A using a sophisticated molecular dynamics protocol and solid-phase peptide synthesis ...

    The incorporation of diamondoid amino acids (DAAs) into peptide-like drugs is a general strategy to improve lipophilicity, membrane permeability, and metabolic stability of peptidomimetic pharmaceuticals. We designed and synthesized five novel peptidic DAA-containing kinase inhibitors of protein kinase A using a sophisticated molecular dynamics protocol and solid-phase peptide synthesis. By means of a thermophoresis binding assay, NMR, and crystal structure analysis, we determined the influence of the DAAs on the secondary structure and binding affinity in comparison to the native protein kinase inhibitor, which is purely composed of proteinogenic amino acids. Affinity and binding pose are largely conserved. One variant showed 6.5-fold potency improvement, most likely related to its increased side chain lipophilicity. A second variant exhibited slightly decreased affinity presumably due to loss of hydrogen-bond contacts to surrounding water molecules of the first solvation shell.


    Organizational Affiliation

    Institute of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6, 35032, Marburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cAMP-dependent protein kinase catalytic subunit alphaA353Cricetulus griseusMutation(s): 0 
Gene Names: PRKACA
EC: 2.7.11.11
UniProt
Find proteins for P25321 (Cricetulus griseus)
Explore P25321 
Go to UniProtKB:  P25321
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25321
Protein Feature View
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
UPF0418 protein FAM164AB [auth D]18Cricetulus griseusMutation(s): 1 
Gene Names: I79_011066
UniProt
Find proteins for G3HK48 (Cricetulus griseus)
Explore G3HK48 
Go to UniProtKB:  G3HK48
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG3HK48
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
M77
Query on M77

Download Ideal Coordinates CCD File 
C [auth A]5-(1,4-DIAZEPAN-1-SULFONYL)ISOQUINOLINE
C14 H17 N3 O2 S
NGOGFTYYXHNFQH-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
Binding Affinity Annotations 
IDSourceBinding Affinity
M77 BindingDB:  5OK3 Ki: min: 460, max: 1600 (nM) from 2 assay(s)
IC50: min: 541, max: 7605 (nM) from 12 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.141 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.609α = 90
b = 73.281β = 90
c = 108.428γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
Cootmodel building
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Loewe-CorporationGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2019-05-15
    Changes: Data collection, Database references