View source for 1p6o


==The crystal structure of yeast cytosine deaminase bound to 4(R)-hydroxyl-3,4-dihydropyrimidine at 1.14 angstroms.==
<StructureSection load='1p6o' size='340' side='right'caption='[[1p6o]], [[Resolution|resolution]] 1.14&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1p6o]] is a 2 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=1P6O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1P6O 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]] 1.14&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=HPY:4-HYDROXY-3,4-DIHYDRO-1H-PYRIMIDIN-2-ONE'>HPY</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=1p6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1p6o OCA], [https://pdbe.org/1p6o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1p6o RCSB], [https://www.ebi.ac.uk/pdbsum/1p6o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1p6o ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FCY1_YEAST FCY1_YEAST] Converts cytosine to uracil or 5-methylcytosine to thymine by deaminating carbon number 4.
== 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/p6/1p6o_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1p6o ConSurf].
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== Publication Abstract from PubMed ==
Cytosine deaminase (CD) catalyzes the deamination of cytosine and is only present in prokaryotes and fungi, where it is a member of the pyrimidine salvage pathway. The enzyme is of interest both for antimicrobial drug design and gene therapy applications against tumors. The structure of Saccharomyces cerevisiae CD has been determined in the presence and absence of a mechanism-based inhibitor, at 1.14 and 1.43 A resolution, respectively. The enzyme forms an alpha/beta fold similar to bacterial cytidine deaminase, but with no similarity to the alpha/beta barrel fold used by bacterial cytosine deaminase or mammalian adenosine deaminase. The structures observed for bacterial, fungal, and mammalian nucleic acid deaminases represent an example of the parallel evolution of two unique protein folds to carry out the same reaction on a diverse array of substrates.

The 1.14 A crystal structure of yeast cytosine deaminase: evolution of nucleotide salvage enzymes and implications for genetic chemotherapy.,Ireton GC, Black ME, Stoddard BL Structure. 2003 Aug;11(8):961-72. PMID:12906827<ref>PMID:12906827</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1p6o" style="background-color:#fffaf0;"></div>

==See Also==
*[[Deaminase|Deaminase]]
*[[Deaminase 3D structures|Deaminase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Black ME]]
[[Category: Ireton GC]]
[[Category: Stoddard BL]]