1fa9: Difference between revisions
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|PDB= 1fa9 |SIZE=350|CAPTION= <scene name='initialview01'>1fa9</scene>, resolution 2.4Å | |PDB= 1fa9 |SIZE=350|CAPTION= <scene name='initialview01'>1fa9</scene>, resolution 2.4Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=GLC:GLUCOSE'>GLC</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</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] | |ACTIVITY= <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> | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1fc0|1FC0]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fa9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fa9 OCA], [http://www.ebi.ac.uk/pdbsum/1fa9 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1fa9 RCSB]</span> | |||
}} | }} | ||
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==Overview== | ==Overview== | ||
Glycogen phosphorylases catalyze the breakdown of glycogen to glucose-1-phosphate, which enters glycolysis to fulfill the energetic requirements of the organism. Maintaining control of blood glucose levels is critical in minimizing the debilitating effects of diabetes, making liver glycogen phosphorylase a potential therapeutic target. To support inhibitor design, we determined the crystal structures of the active and inactive forms of human liver glycogen phosphorylase a. During activation, forty residues of the catalytic site undergo order/disorder transitions, changes in secondary structure, or packing to reorganize the catalytic site for substrate binding and catalysis. Knowing the inactive and active conformations of the liver enzyme and how each differs from its counterpart in muscle phosphorylase provides the basis for designing inhibitors that bind preferentially to the inactive conformation of the liver isozyme. | Glycogen phosphorylases catalyze the breakdown of glycogen to glucose-1-phosphate, which enters glycolysis to fulfill the energetic requirements of the organism. Maintaining control of blood glucose levels is critical in minimizing the debilitating effects of diabetes, making liver glycogen phosphorylase a potential therapeutic target. To support inhibitor design, we determined the crystal structures of the active and inactive forms of human liver glycogen phosphorylase a. During activation, forty residues of the catalytic site undergo order/disorder transitions, changes in secondary structure, or packing to reorganize the catalytic site for substrate binding and catalysis. Knowing the inactive and active conformations of the liver enzyme and how each differs from its counterpart in muscle phosphorylase provides the basis for designing inhibitors that bind preferentially to the inactive conformation of the liver isozyme. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Schulte, G K.]] | [[Category: Schulte, G K.]] | ||
[[Category: Wasilko, D J.]] | [[Category: Wasilko, D J.]] | ||
[[Category: allosteric protein]] | [[Category: allosteric protein]] | ||
[[Category: phosphorylated protein]] | [[Category: phosphorylated protein]] | ||
[[Category: protein-ligand complex]] | [[Category: protein-ligand complex]] | ||
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