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1tk1

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[[Image:1tk1.jpg|left|200px]]
 
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==YEAST OXYGEN-DEPENDENT COPROPORPHYRINOGEN OXIDASE==
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The line below this paragraph, containing "STRUCTURE_1tk1", creates the "Structure Box" on the page.
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<StructureSection load='1tk1' size='340' side='right'caption='[[1tk1]], [[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'>[[1tk1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TK1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TK1 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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1tk1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tk1 OCA], [https://pdbe.org/1tk1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tk1 RCSB], [https://www.ebi.ac.uk/pdbsum/1tk1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tk1 ProSAT]</span></td></tr>
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{{STRUCTURE_1tk1| PDB=1tk1 | SCENE= }}
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</table>
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== Function ==
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'''YEAST OXYGEN-DEPENDENT COPROPORPHYRINOGEN OXIDASE'''
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[https://www.uniprot.org/uniprot/HEM6_YEAST HEM6_YEAST] Involved in the heme biosynthesis. Catalyzes the aerobic oxidative decarboxylation of propionate groups of rings A and B of coproporphyrinogen-III to yield the vinyl groups in protoporphyrinogen-IX (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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==Overview==
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Check<jmol>
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Coproporphyrinogen oxidase (CPO) is an essential enzyme that catalyzes the sixth step of the heme biosynthetic pathway. Unusually for heme biosynthetic enzymes, CPO exists in two evolutionarily and mechanistically distinct families, with eukaryotes and some prokaryotes employing members of the highly conserved oxygen-dependent CPO family. Here, we report the crystal structure of the oxygen-dependent CPO from Saccharomyces cerevisiae (Hem13p), which was determined by optimized sulfur anomalous scattering and refined to a resolution of 2.0 A. The protein adopts a novel structure that is quite different from predicted models and features a central flat seven-stranded anti-parallel sheet that is flanked by helices. The dimeric assembly, which is seen in different crystal forms, is formed by packing of helices and a short isolated strand that forms a beta-ladder with its counterpart in the partner subunit. The deep active-site cleft is lined by conserved residues and has been captured in open and closed conformations in two different crystal forms. A substratesized cavity is completely buried in the closed conformation by the approximately 8-A movement of a helix that forms a lid over the active site. The structure therefore suggests residues that likely play critical roles in catalysis and explains the deleterious effect of many of the mutations associated with the disease hereditary coproporphyria.
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/tk/1tk1_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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1TK1 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TK1 OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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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=1tk1 ConSurf].
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Crystal structure of the oxygen-dependant coproporphyrinogen oxidase (Hem13p) of Saccharomyces cerevisiae., Phillips JD, Whitby FG, Warby CA, Labbe P, Yang C, Pflugrath JW, Ferrara JD, Robinson H, Kushner JP, Hill CP, J Biol Chem. 2004 Sep 10;279(37):38960-8. Epub 2004 Jun 12. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15194705 15194705]
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<div style="clear:both"></div>
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[[Category: Coproporphyrinogen oxidase]]
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Single protein]]
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[[Category: Ferrara JD]]
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[[Category: Ferrara, J D.]]
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[[Category: Hill CP]]
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[[Category: Hill, C P.]]
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[[Category: Kushner JP]]
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[[Category: Kushner, J P.]]
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[[Category: Labbe P]]
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[[Category: Labbe, P.]]
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[[Category: Pflugrath JW]]
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[[Category: Pflugrath, J W.]]
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[[Category: Phillips JD]]
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[[Category: Phillips, J D.]]
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[[Category: Robinson H]]
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[[Category: Robinson, H.]]
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[[Category: Warby CA]]
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[[Category: Warby, C A.]]
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[[Category: Whitby FG]]
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[[Category: Whitby, F G.]]
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[[Category: Yang C]]
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[[Category: Yang, C.]]
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[[Category: Coproporphyrinogen oxidase]]
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[[Category: Enzyme]]
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[[Category: Heme biosynthesis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 10:02:48 2008''
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Current revision

YEAST OXYGEN-DEPENDENT COPROPORPHYRINOGEN OXIDASE

PDB ID 1tk1

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