1H5U

THE 1.76 A RESOLUTION CRYSTAL STRUCTURE OF GLYCOGEN PHOSPHORYLASE B COMPLEXED WITH GLUCOSE AND CP320626, A POTENTIAL ANTIDIABETIC DRUG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 

Starting Model: experimental
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This is version 1.6 of the entry. See complete history


Literature

The 1.76 A Resolution Crystal Structure of Glycogen Phosphorylase B Complexed with Glucose, and Cp320626, a Potential Antidiabetic Drug

Oikonomakos, N.G.Zographos, S.E.Skamnaki, V.T.Archontis, G.

(2002) Bioorg Med Chem 10: 1313

  • DOI: https://doi.org/10.1016/s0968-0896(01)00394-7
  • Primary Citation of Related Structures:  
    1H5U

  • PubMed Abstract: 

    CP320626, a potential antidiabetic drug, inhibits glycogen phosphorylase in synergism with glucose. To elucidate the structural basis of synergistic inhibition, we determined the structure of muscle glycogen phosphorylase b (MGPb) complexed with both glucose and CP320626 at 1.76 A resolution, and refined to a crystallographic R value of 0.211 (R(free)=0.235). CP320626 binds at a novel allosteric site, which is some 33 A from the catalytic site, where glucose binds. The high resolution structure allows unambiguous definition of the conformation of the 1-acetyl-4-hydroxy-piperidine ring supported by theoretical energy calculations. Both CP320626 and glucose promote the less active T-state, thereby explaining their synergistic inhibition. Structural comparison of MGPb--glucose--CP320626 complex with liver glycogen phosphorylase a (LGPa) complexed with a related compound (CP403700) show that the ligand binding site is conserved in LGPa.


  • Organizational Affiliation

    Institute of Biological Research and Biotechnology, The National Hellenic Research Foundation, 48 Vas. Constantinou Avenue, Athens 11635, Greece. ngo@eie.gr


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GLYCOGEN PHOSPHORYLASE842Oryctolagus 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
CHI
Query on CHI

Download Ideal Coordinates CCD File 
B [auth A]5-CHLORO-1H-INDOLE-2-CARBOXYLIC ACID [1-(4-FLUOROBENZYL)-2-(4-HYDROXYPIPERIDIN-1YL)-2-OXOETHYL]AMIDE
C23 H23 Cl F N3 O3
YDCGVASFVACWKF-NRFANRHFSA-N
PLP
Query on PLP

Download Ideal Coordinates CCD File 
D [auth A]PYRIDOXAL-5'-PHOSPHATE
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N
GLC
Query on GLC

Download Ideal Coordinates CCD File 
C [auth A]alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
CHI BindingDB:  1H5U IC50: 500 (nM) from 1 assay(s)
PDBBind:  1H5U IC50: 178 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.966α = 90
b = 128.966β = 90
c = 116.186γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-06-28
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-22
    Changes: Data collection, Derived calculations, Other, Refinement description
  • Version 1.4: 2019-07-24
    Changes: Data collection
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.6: 2023-12-13
    Changes: Data collection, Database references, Refinement description, Structure summary