6F3U

The crystal structure of Glycogen Phosphorylase in complex with 10h


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.144 

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Ligand Structure Quality Assessment 


This is version 1.0 of the entry. See complete history


Literature

A multidisciplinary study of 3-( beta-d-glucopyranosyl)-5-substituted-1,2,4-triazole derivatives as glycogen phosphorylase inhibitors: Computation, synthesis, crystallography and kinetics reveal new potent inhibitors.

Kun, S.Begum, J.Kyriakis, E.Stamati, E.C.V.Barkas, T.A.Szennyes, E.Bokor, E.Szabo, K.E.Stravodimos, G.A.Sipos, A.Docsa, T.Gergely, P.Moffatt, C.Patraskaki, M.S.Kokolaki, M.C.Gkerdi, A.Skamnaki, V.T.Leonidas, D.D.Somsak, L.Hayes, J.M.

(2018) Eur J Med Chem 147: 266-278

  • DOI: https://doi.org/10.1016/j.ejmech.2018.01.095
  • Primary Citation of Related Structures:  
    6F3J, 6F3L, 6F3R, 6F3S, 6F3U

  • PubMed Abstract: 

    3-(β-d-Glucopyranosyl)-5-substituted-1,2,4-triazoles have been revealed as an effective scaffold for the development of potent glycogen phosphorylase (GP) inhibitors but with the potency very sensitive to the nature of the alkyl/aryl 5-substituent (Kun et al., Eur. J. Med. Chem. 2014, 76, 567). For a training set of these ligands, quantum mechanics-polarized ligand docking (QM-PLD) demonstrated good potential to identify larger differences in potencies (predictive index PI = 0.82) and potent inhibitors with K i 's < 10 μM (AU-ROC = 0.86). Accordingly, in silico screening of 2335 new analogues exploiting the ZINC docking database was performed and nine predicted candidates selected for synthesis. The compounds were prepared in O-perbenzoylated forms by either ring transformation of 5-β-d-glucopyranosyl tetrazole by N-benzyl-arenecarboximidoyl chlorides, ring closure of C-(β-d-glucopyranosyl)formamidrazone with aroyl chlorides, or that of N-(β-d-glucopyranosylcarbonyl)arenethiocarboxamides by hydrazine, followed by deprotections. Kinetics experiments against rabbit muscle GPb (rmGPb) and human liver GPa (hlGPa) revealed five compounds as potent low μM inhibitors with three of these on the submicromolar range for rmGPa. X-ray crystallographic analysis sourced the potency to a combination of favorable interactions from the 1,2,4-triazole and suitable aryl substituents in the GP catalytic site. The compounds also revealed promising calculated pharmacokinetic profiles.


  • Organizational Affiliation

    Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycogen phosphorylase, muscle form843Oryctolagus cuniculusMutation(s): 0 
EC: 2.4.1.1
UniProt
Find proteins for P00489 (Oryctolagus cuniculus)
Explore P00489 
Go to UniProtKB:  P00489
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00489
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CNK
Query on CNK

Download Ideal Coordinates CCD File 
D [auth A](2~{R},3~{S},4~{R},5~{R},6~{S})-2-(hydroxymethyl)-6-(5-naphthalen-1-yl-4~{H}-1,2,4-triazol-3-yl)oxane-3,4,5-triol
C18 H19 N3 O5
UGWCMNZLMGJTJS-IBEHDNSVSA-N
IMP
Query on IMP

Download Ideal Coordinates CCD File 
C [auth A]INOSINIC ACID
C10 H13 N4 O8 P
GRSZFWQUAKGDAV-KQYNXXCUSA-N
PLP
Query on PLP

Download Ideal Coordinates CCD File 
B [auth A]PYRIDOXAL-5'-PHOSPHATE
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
CNK Binding MOAD:  6F3U Ki: 1.15e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.144 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.595α = 90
b = 128.595β = 90
c = 116.648γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-28
    Type: Initial release