View source for 2f3q

==Crystal structure of the glycogen phosphorylase B / methyl-N-(beta-D-glucopyranosyl)oxamate complex==
<StructureSection load='2f3q' size='340' side='right' caption='[[2f3q]], [[Resolution|resolution]] 1.96&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2f3q]] is a 1 chain structure with 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=2F3Q OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2F3Q FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=6GP:METHYL-N-(BETA-D-GLUCOPYRANOSYL)OXAMATE'>6GP</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2f3p|2f3p]], [[2f3s|2f3s]], [[2f3u|2f3u]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[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] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2f3q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2f3q OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2f3q RCSB], [http://www.ebi.ac.uk/pdbsum/2f3q PDBsum]</span></td></tr>
</table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/f3/2f3q_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Five oxalyl derivatives of beta-d-glucopyranosylamine were synthesized as potential inhibitors of glycogen phosphorylase (GP). The compounds 1-4 were competitive inhibitors of rabbit muscle GPb (with respect to alpha-d-glucose-1-phosphate) with K(i) values of 0.2-1.4 mM, while compound 5 was not effective up to a concentration of 10 mM. In order to elucidate the structural basis of their inhibition, we analysed the structures of compounds 1-4 in complex with GPb at 1.93-1.96 Angstrom resolution. The complex structures reveal that the inhibitors can be accommodated at the catalytic site at approximately the same position as alpha-d-glucose and stabilize the T-state conformation of the 280 s loop by making several favourable contacts to Asp283 and Asn284 of this loop. Comparison with the lead compound N-acetyl-beta-d-glucopyranosylamine (6) shows that the hydrogen bonding interaction of the amide nitrogen with the main-chain carbonyl oxygen of His377 is not present in these complexes. The differences observed in the K(i) values of the four 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 interactions, conformational entropy and desolvation effects.

Binding of oxalyl derivatives of beta-d-glucopyranosylamine to muscle glycogen phosphorylase b.,Hadjiloi T, Tiraidis C, Chrysina ED, Leonidas DD, Oikonomakos NG, Tsipos P, Gimisis T Bioorg Med Chem. 2006 Jun 1;14(11):3872-82. Epub 2006 Feb 7. PMID:16464598<ref>PMID:16464598</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[Glycogen Phosphorylase|Glycogen Phosphorylase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Oryctolagus cuniculus]]
[[Category: Phosphorylase]]
[[Category: Leonidas, D D]]
[[Category: Oikonomakos, N G]]
[[Category: Glycogenolysis]]
[[Category: Transferase]]
[[Category: Type 2 diabetes]]