5N3D

cAMP-dependent Protein Kinase A from Cricetulus griseus in complex with fragment like molecule 4-(trifluoromethyl)benzenecarboximidamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Fragment Binding to Kinase Hinge: If Charge Distribution and Local pK a Shifts Mislead Popular Bioisosterism Concepts.

Oebbeke, M.Siefker, C.Wagner, B.Heine, A.Klebe, G.

(2020) Angew Chem Int Ed Engl 

  • DOI: https://doi.org/10.1002/anie.202011295
  • Primary Citation of Related Structures:  
    5N33, 5N3C, 5N3D, 5N3E, 5N3H, 5N3J, 5N3Q, 5N3S, 6SNN, 6SNX, 6SOX, 6SPM, 6SPS, 6SPU, 6SPY, 6YPS, 6Z08, 6Z44, 6ZN0

  • PubMed Abstract: 

    Medicinal-chemistry optimization follows strategies replacing functional groups and attaching larger substituents at a promising lead scaffold. Well-established bioisosterism rules are considered, however, it is difficult to estimate whether the introduced modifications really match the required properties at a binding site. The electron density distribution and pK a values are modulated influencing protonation states and bioavailability. Considering the adjacent H-bond donor/acceptor pattern of the hinge binding motif in a kinase, we studied by crystallography a set of fragments to map the required interaction pattern. Unexpectedly, benzoic acid and benzamidine, decorated with the correct substituents, are totally bioisosteric just as carboxamide and phenolic OH. A mono-dentate pyridine nitrogen out-performs bi-dentate functionalities. The importance of correctly designing pK a values of attached functional groups by additional substituents at the parent scaffold is rendered prominent.


  • Organizational Affiliation

    Philipps Universität Marburg, Institut für Pharmazeutische Chemie, Marbacher Weg 6, 35032, Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cAMP-dependent protein kinase catalytic subunit alpha353Cricetulus 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
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
cAMP-dependent protein kinase inhibitor alpha-like protein19Cricetulus griseusMutation(s): 0 
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
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
8NE
Query on 8NE

Download Ideal Coordinates CCD File 
C [auth A][azanyl-[4-(trifluoromethyl)phenyl]methylidene]azanium
C8 H8 F3 N2
XFLGYXVBXUAGQV-UHFFFAOYSA-O
MPD
Query on MPD

Download Ideal Coordinates CCD File 
D [auth A](4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
Modified Residues  2 Unique
IDChains TypeFormula2D 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: 1.77 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.419α = 90
b = 72.389β = 90
c = 108.383γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing
Cootmodel building

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-28
    Type: Initial release
  • Version 1.1: 2019-08-14
    Changes: Data collection
  • Version 1.2: 2020-12-09
    Changes: Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Refinement description