4mra
From Proteopedia
(Difference between revisions)
(New page: '''Unreleased structure''' The entry 4mra is ON HOLD Authors: Kantsadi L. Anastassia, Chatzileontiadou S.M. Demetra, Leonidas D.Demetres Description: Crystal structure of Gpb in comple...) |
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of Gpb in complex with QUERCETIN== | |
| + | <StructureSection load='4mra' size='340' side='right'caption='[[4mra]], [[Resolution|resolution]] 2.34Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4mra]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MRA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MRA FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.34Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene>, <scene name='pdbligand=QUE:3,5,7,3,4-PENTAHYDROXYFLAVONE'>QUE</scene></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4mra FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mra OCA], [https://pdbe.org/4mra PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mra RCSB], [https://www.ebi.ac.uk/pdbsum/4mra PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mra ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/PYGM_RABIT PYGM_RABIT] Phosphorylase is an important allosteric enzyme in carbohydrate metabolism. Enzymes from different sources differ in their regulatory mechanisms and in their natural substrates. However, all known phosphorylases share catalytic and structural properties. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The inhibitory potency of thirteen polyphenolic extracts obtained from vinification byproducts of Greek varieties of Vitis vinifera against glycogen phosphorylase (GP) has been studied by kinetic experiments. GP is an enzyme involved in glucose homeostasis and a molecular target for the discovery of new hypoglycemic agents. Studies have shown that all extracts display significant inhibitory potency for GP in vitro with IC50 values in the range of low mug/mL. X-ray crystallographic analysis of GP crystals soaked with two of these extracts revealed that the most active ingredient is quercetin which binds at novel binding site, distinct from the other known sites of the enzyme. One of the most potent of the studied extracts had also a moderate effect on glycogenolysis in the cellular lever with an IC50 value of 17.35mug/mL. These results highlight the importance of natural resources in the quest for the discovery of new hypoglycemic agents, while at the same time they can serve as the starting point for their exploitation for antidiabetic usage and the development of novel biofunctional foods. | ||
| - | + | Biochemical and biological assessment of the inhibitory potency of extracts from vinification byproducts of Vitis vinifera extracts against glycogen phosphorylase.,Kantsadi AL, Apostolou A, Theofanous S, Stravodimos GA, Kyriakis E, Gorgogietas VA, Chatzileontiadou DS, Pegiou K, Skamnaki VT, Stagos D, Kouretas D, Psarra AM, Haroutounian SA, Leonidas DD Food Chem Toxicol. 2014 May;67:35-43. doi: 10.1016/j.fct.2014.01.055. Epub 2014, Feb 18. PMID:24556570<ref>PMID:24556570</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| + | </div> | ||
| + | <div class="pdbe-citations 4mra" style="background-color:#fffaf0;"></div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[Glycogen phosphorylase 3D structures|Glycogen phosphorylase 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Oryctolagus cuniculus]] | ||
| + | [[Category: Chatzileontiadou SMD]] | ||
| + | [[Category: Kantsadi LA]] | ||
| + | [[Category: Leonidas DD]] | ||
Current revision
Crystal structure of Gpb in complex with QUERCETIN
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