6S4K

The crystal structure of glycogen phosphorylase in complex with 12

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.155 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history. 


Literature

The architecture of hydrogen and sulfur sigma-hole interactions explain differences in the inhibitory potency of C-beta-d-glucopyranosyl thiazoles, imidazoles and an N-beta-d glucopyranosyl tetrazole for human liver glycogen phosphorylase and offer new insights to structure-based design.

Kyriakis, E., Karra, A.G., Papaioannou, O., Solovou, T., Skamnaki, V.T., Liggri, P.G.V., Zographos, S.E., Szennyes, E., Bokor, E., Kun, S., Psarra, A.G., Somsak, L., Leonidas, D.D.

(2020) Bioorg Med Chem 28: 115196-115196

  • DOI: 10.1016/j.bmc.2019.115196
  • Primary Citation of Related Structures:  
    6S4P, 6S51, 6S4O, 6S4R, 6S52, 6S4H, 6S4K

  • PubMed Abstract: 

    • C-Glucopyranosyl imidazoles, thiazoles, and an N-glucopyranosyl tetrazole were assessed in vitro and ex vivo for their inhibitory efficiency against isoforms of glycogen phosphorylase (GP; a validated pharmacological target for the development of anti-hyperglycaemic agents) ...

    C-Glucopyranosyl imidazoles, thiazoles, and an N-glucopyranosyl tetrazole were assessed in vitro and ex vivo for their inhibitory efficiency against isoforms of glycogen phosphorylase (GP; a validated pharmacological target for the development of anti-hyperglycaemic agents). Imidazoles proved to be more potent inhibitors than the corresponding thiazoles or the tetrazole. The most potent derivative has a 2-naphthyl substituent, a K i value of 3.2 µM for hepatic glycogen phosphorylase, displaying also 60% inhibition of GP activity in HepG2 cells, compared to control vehicle treated cells, at 100 μM. X-Ray crystallography studies of the protein - inhibitor complexes revealed the importance of the architecture of inhibitor associated hydrogen bonds or sulfur σ-hole bond interactions to Asn284 OD1, offering new insights to structure-based design efforts. Moreover, while the 2-glucopyranosyl-tetrazole seems to bind differently from the corresponding 1,2,3-triazole compound, the two inhibitors are equipotent.

    Organizational Affiliation: 

    Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece. Electronic address: ddleonidas@bio.uth.gr.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glycogen phosphorylase, muscle form A843Oryctolagus cuniculusMutation(s): 0 
Gene Names: PYGM
EC: 2.4.1.1
Find proteins for P00489 (Oryctolagus cuniculus)
Explore P00489 
Go to UniProtKB:  P00489
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KVW
Query on KVW
Download Ideal Coordinates CCD File 
A
(2~{R},3~{S},4~{S},5~{R},6~{R})-2-(hydroxymethyl)-6-(4-phenyl-1,3-thiazol-2-yl)oxane-3,4,5-triol
C15 H17 N O5 S
CQDQZIAPWGJSQJ-RKQHYHRCSA-N		 Ligand Interaction
PLP
Query on PLP
Download Ideal Coordinates CCD File 
A
PYRIDOXAL-5'-PHOSPHATE
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
KVWKi:  310000   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.155 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.165α = 90
b = 128.165β = 90
c = 115.879γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CrysalisProdata reduction
Aimlessdata scaling
REFMACphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-19
    Type: Initial release