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1cza

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[[Image:1cza.gif|left|200px]]
 
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==MUTANT MONOMER OF RECOMBINANT HUMAN HEXOKINASE TYPE I COMPLEXED WITH GLUCOSE, GLUCOSE-6-PHOSPHATE, AND ADP==
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The line below this paragraph, containing "STRUCTURE_1cza", creates the "Structure Box" on the page.
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<StructureSection load='1cza' size='340' side='right'caption='[[1cza]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1cza]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CZA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CZA FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=G6P:ALPHA-D-GLUCOSE-6-PHOSPHATE'>G6P</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene></td></tr>
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{{STRUCTURE_1cza| PDB=1cza | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1cza FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cza OCA], [https://pdbe.org/1cza PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cza RCSB], [https://www.ebi.ac.uk/pdbsum/1cza PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cza ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/HXK1_HUMAN HXK1_HUMAN] Defects in HK1 are the cause of hexokinase deficiency (HK deficiency) [MIM:[https://omim.org/entry/235700 235700]. HK deficiency is a rare autosomal recessive disease with nonspherocytic hemolytic anemia as the predominant clinical feature.
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== Function ==
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[https://www.uniprot.org/uniprot/HXK1_HUMAN HXK1_HUMAN]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cz/1cza_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1cza ConSurf].
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<div style="clear:both"></div>
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'''MUTANT MONOMER OF RECOMBINANT HUMAN HEXOKINASE TYPE I COMPLEXED WITH GLUCOSE, GLUCOSE-6-PHOSPHATE, AND ADP'''
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==See Also==
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*[[Hexokinase 3D structures|Hexokinase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Hexokinase I, the pacemaker of glycolysis in brain tissue, is composed of two structurally similar halves connected by an alpha-helix. The enzyme dimerizes at elevated protein concentrations in solution and in crystal structures; however, almost all published data reflect the properties of a hexokinase I monomer in solution. Crystal structures of mutant forms of recombinant human hexokinase I, presented here, reveal the enzyme monomer for the first time. The mutant hexokinases bind both glucose 6-phosphate and glucose with high affinity to their N and C-terminal halves, and ADP, also with high affinity, to a site near the N terminus of the polypeptide chain. Exposure of the monomer crystals to ADP in the complete absence of glucose 6-phosphate reveals a second binding site for adenine nucleotides at the putative active site (C-half), with conformational changes extending 15 A to the contact interface between the N and C-halves. The structures reveal distinct conformational states for the C-half and a rigid-body rotation of the N-half, as possible elements of a structure-based mechanism for allosteric regulation of catalysis.
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==About this Structure==
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1CZA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CZA OCA].
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==Reference==
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Crystal structures of mutant monomeric hexokinase I reveal multiple ADP binding sites and conformational changes relevant to allosteric regulation., Aleshin AE, Kirby C, Liu X, Bourenkov GP, Bartunik HD, Fromm HJ, Honzatko RB, J Mol Biol. 2000 Mar 3;296(4):1001-15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10686099 10686099]
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[[Category: Hexokinase]]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Aleshin, A E.]]
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[[Category: Aleshin AE]]
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[[Category: Bartunik, H D.]]
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[[Category: Bartunik HD]]
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[[Category: Bourenkov, G P.]]
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[[Category: Bourenkov GP]]
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[[Category: Fromm, H J.]]
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[[Category: Fromm HJ]]
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[[Category: Honzatko, R B.]]
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[[Category: Honzatko RB]]
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[[Category: Kirby, C.]]
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[[Category: Kirby C]]
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[[Category: Liu, X.]]
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[[Category: Liu X]]
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[[Category: Structurally homologous domain]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:16:07 2008''
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Current revision

MUTANT MONOMER OF RECOMBINANT HUMAN HEXOKINASE TYPE I COMPLEXED WITH GLUCOSE, GLUCOSE-6-PHOSPHATE, AND ADP

PDB ID 1cza

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