1ww3: Difference between revisions
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[[Image:1ww3.gif|left|200px]] | [[Image:1ww3.gif|left|200px]] | ||
'''Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase''' | {{Structure | ||
|PDB= 1ww3 |SIZE=350|CAPTION= <scene name='initialview01'>1ww3</scene>, resolution 1.80Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=NTF:N-TRIFLURO-ACETYL-BETA-D-GLUCOPYRANOSYLAMINE'>NTF</scene> and <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Phosphorylase Phosphorylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.1 2.4.1.1] | |||
|GENE= | |||
}} | |||
'''Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1WW3 is a [ | 1WW3 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WW3 OCA]. | ||
==Reference== | ==Reference== | ||
Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase., Anagnostou E, Kosmopoulou MN, Chrysina ED, Leonidas DD, Hadjiloi T, Tiraidis C, Zographos SE, Gyorgydeak Z, Somsak L, Docsa T, Gergely P, Kolisis FN, Oikonomakos NG, Bioorg Med Chem. 2006 Jan 1;14(1):181-9. Epub 2005 Oct 4. PMID:[http:// | Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase., Anagnostou E, Kosmopoulou MN, Chrysina ED, Leonidas DD, Hadjiloi T, Tiraidis C, Zographos SE, Gyorgydeak Z, Somsak L, Docsa T, Gergely P, Kolisis FN, Oikonomakos NG, Bioorg Med Chem. 2006 Jan 1;14(1):181-9. Epub 2005 Oct 4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16213146 16213146] | ||
[[Category: Oryctolagus cuniculus]] | [[Category: Oryctolagus cuniculus]] | ||
[[Category: Phosphorylase]] | [[Category: Phosphorylase]] | ||
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[[Category: type 2 diabetes]] | [[Category: type 2 diabetes]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:02:13 2008'' | ||
Revision as of 16:02, 20 March 2008
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| , resolution 1.80Å | |||||||
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| Ligands: | and | ||||||
| Activity: | Phosphorylase, with EC number 2.4.1.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase
OverviewOverview
Structure-based inhibitor design has led to the discovery of a number of potent inhibitors of glycogen phosphorylase b (GPb), N-acyl derivatives of beta-D-glucopyranosylamine, that bind at the catalytic site of the enzyme. The first good inhibitor in this class of compounds, N-acetyl-beta-D-glucopyranosylamine (NAG) (K(i) = 32 microM), has been previously characterized by biochemical, biological and crystallographic experiments at 2.3 angstroms resolution. Bioisosteric replacement of the acetyl group by trifluoroacetyl group resulted in an inhibitor, N-trifluoroacetyl-beta-D-glucopyranosylamine (NFAG), with a K(i) = 75 microM. To elucidate the structural basis of its reduced potency, we determined the ligand structure in complex with GPb at 1.8 angstroms resolution. To compare the binding mode of N-trifluoroacetyl derivative with that of the lead molecule, we also determined the structure of GPb-NAG complex at a higher resolution (1.9 angstroms). NFAG can be accommodated in the catalytic site of T-state GPb at approximately the same position as that of NAG and stabilize the T-state conformation of the 280 s loop by making several favourable contacts to Asn284 of this loop. The difference observed in the K(i) values of the two analogues can be interpreted in terms of subtle conformational changes of protein residues and shifts of water molecules in the vicinity of the catalytic site, variations in van der Waals interaction, and desolvation effects.
About this StructureAbout this Structure
1WW3 is a Single protein structure of sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA.
ReferenceReference
Crystallographic studies on two bioisosteric analogues, N-acetyl-beta-D-glucopyranosylamine and N-trifluoroacetyl-beta-D-glucopyranosylamine, potent inhibitors of muscle glycogen phosphorylase., Anagnostou E, Kosmopoulou MN, Chrysina ED, Leonidas DD, Hadjiloi T, Tiraidis C, Zographos SE, Gyorgydeak Z, Somsak L, Docsa T, Gergely P, Kolisis FN, Oikonomakos NG, Bioorg Med Chem. 2006 Jan 1;14(1):181-9. Epub 2005 Oct 4. PMID:16213146
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