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[[Image:9gpb.gif|left|200px]]
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{{STRUCTURE_9gpb|  PDB=9gpb  |  SCENE=  }}
'''THE ALLOSTERIC TRANSITION OF GLYCOGEN PHOSPHORYLASE'''


==THE ALLOSTERIC TRANSITION OF GLYCOGEN PHOSPHORYLASE==
<StructureSection load='9gpb' size='340' side='right'caption='[[9gpb]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9gpb]] is a 4 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=9GPB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9GPB 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]] 2.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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=SO4:SULFATE+ION'>SO4</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=9gpb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9gpb OCA], [https://pdbe.org/9gpb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9gpb RCSB], [https://www.ebi.ac.uk/pdbsum/9gpb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9gpb 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.
== 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/gp/9gpb_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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/main_output.php?pdb_ID=9gpb ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structure of R-state glycogen phosphorylase b has been determined at 2.9 A resolution. A comparison of T-state and R-state structures of the enzyme explains its cooperative behaviour on ligand binding and the allosteric regulation of its activity. Communication between catalytic sites of the dimer is provided by a change in packing geometry of two helices linking each site with the subunit interface. Activation by AMP or by phosphorylation results in a quaternary conformational change that switches these two helices into the R-state conformation.


==Overview==
The allosteric transition of glycogen phosphorylase.,Barford D, Johnson LN Nature. 1989 Aug 24;340(6235):609-16. PMID:2770867<ref>PMID:2770867</ref>
The crystal structure of R-state glycogen phosphorylase b has been determined at 2.9 A resolution. A comparison of T-state and R-state structures of the enzyme explains its cooperative behaviour on ligand binding and the allosteric regulation of its activity. Communication between catalytic sites of the dimer is provided by a change in packing geometry of two helices linking each site with the subunit interface. Activation by AMP or by phosphorylation results in a quaternary conformational change that switches these two helices into the R-state conformation.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
9GPB 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=9GPB OCA].
</div>
<div class="pdbe-citations 9gpb" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
The allosteric transition of glycogen phosphorylase., Barford D, Johnson LN, Nature. 1989 Aug 24;340(6235):609-16. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2770867 2770867]
*[[Glycogen phosphorylase 3D structures|Glycogen phosphorylase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Oryctolagus cuniculus]]
[[Category: Phosphorylase]]
[[Category: Barford D]]
[[Category: Single protein]]
[[Category: Johnson LN]]
[[Category: Barford, D.]]
[[Category: Johnson, L N.]]
[[Category: Glycogen phosphorylase]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 22:52:59 2008''

Latest revision as of 10:11, 25 December 2024

THE ALLOSTERIC TRANSITION OF GLYCOGEN PHOSPHORYLASE

9gpb, resolution 2.90Å

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