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New page: left|200px {{Structure |PDB= 3c3y |SIZE=350|CAPTION= <scene name='initialview01'>3c3y</scene>, resolution 1.371Å |SITE= <scene name='pdbsite=AC1:Ca+Binding+Site+...
 
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[[Image:3c3y.jpg|left|200px]]


{{Structure
==Crystal Structure of PFOMT, Phenylpropanoid and Flavonoid O-methyltransferase from M. crystallinum==
|PDB= 3c3y |SIZE=350|CAPTION= <scene name='initialview01'>3c3y</scene>, resolution 1.371&Aring;
<StructureSection load='3c3y' size='340' side='right'caption='[[3c3y]], [[Resolution|resolution]] 1.37&Aring;' scene=''>
|SITE= <scene name='pdbsite=AC1:Ca+Binding+Site+For+Residue+B+1'>AC1</scene>, <scene name='pdbsite=AC2:Ca+Binding+Site+For+Residue+A+2'>AC2</scene>, <scene name='pdbsite=AC3:Ca+Binding+Site+For+Residue+A+4'>AC3</scene>, <scene name='pdbsite=AC4:Sah+Binding+Site+For+Residue+A+464'>AC4</scene> and <scene name='pdbsite=AC5:Sah+Binding+Site+For+Residue+B+465'>AC5</scene>
== Structural highlights ==
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene>
<table><tr><td colspan='2'>[[3c3y]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mesembryanthemum_crystallinum Mesembryanthemum crystallinum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C3Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C3Y FirstGlance]. <br>
|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Caffeoyl-CoA_O-methyltransferase Caffeoyl-CoA O-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.104 2.1.1.104] </span>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.371&#8491;</td></tr>
|GENE=
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr>
|DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=pfam01596 Methyltransf_3]</span>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3c3y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c3y OCA], [https://pdbe.org/3c3y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c3y RCSB], [https://www.ebi.ac.uk/pdbsum/3c3y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c3y ProSAT]</span></td></tr>
|RELATEDENTRY=
</table>
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3c3y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c3y OCA], [http://www.ebi.ac.uk/pdbsum/3c3y PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=3c3y RCSB]</span>
== Function ==
}}
[https://www.uniprot.org/uniprot/Q6YI95_MESCR Q6YI95_MESCR]
 
== Evolutionary Conservation ==
'''Crystal Structure of PFOMT, Phenylpropanoid and Flavonoid O-methyltransferase from M. crystallinum'''
[[Image:Consurf_key_small.gif|200px|right]]
 
Check<jmol>
 
  <jmolCheckbox>
==Overview==
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c3/3c3y_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=3c3y ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Plant S-adenosyl-l-methionine-dependent class I natural product O-methyltransferases (OMTs), related to animal catechol OMTs, are dependent on bivalent cations and strictly specific for the meta position of aromatic vicinal dihydroxy groups. While the primary activity of these class I enzymes is methylation of caffeoyl coenzyme A OMTs, a distinct subset is able to methylate a wider range of substrates, characterized by the promiscuous phenylpropanoid and flavonoid OMT. The observed broad substrate specificity resides in two regions: the N-terminus and a variable insertion loop near the C-terminus, which displays the lowest degree of sequence conservation between the two subfamilies. Structural and biochemical data, based on site-directed mutagenesis and domain exchange between the two enzyme types, present evidence that only small topological changes among otherwise highly conserved 3-D structures are sufficient to differentiate between an enzymatic generalist and an enzymatic specialist in plant natural product methylation.
Plant S-adenosyl-l-methionine-dependent class I natural product O-methyltransferases (OMTs), related to animal catechol OMTs, are dependent on bivalent cations and strictly specific for the meta position of aromatic vicinal dihydroxy groups. While the primary activity of these class I enzymes is methylation of caffeoyl coenzyme A OMTs, a distinct subset is able to methylate a wider range of substrates, characterized by the promiscuous phenylpropanoid and flavonoid OMT. The observed broad substrate specificity resides in two regions: the N-terminus and a variable insertion loop near the C-terminus, which displays the lowest degree of sequence conservation between the two subfamilies. Structural and biochemical data, based on site-directed mutagenesis and domain exchange between the two enzyme types, present evidence that only small topological changes among otherwise highly conserved 3-D structures are sufficient to differentiate between an enzymatic generalist and an enzymatic specialist in plant natural product methylation.


==About this Structure==
Biochemical and structural analysis of substrate promiscuity in plant Mg2+-dependent O-methyltransferases.,Kopycki JG, Rauh D, Chumanevich AA, Neumann P, Vogt T, Stubbs MT J Mol Biol. 2008 Apr 18;378(1):154-64. Epub 2008 Feb 20. PMID:18342334<ref>PMID:18342334</ref>
3C3Y is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mesembryanthemum_crystallinum Mesembryanthemum crystallinum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C3Y OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Biochemical and Structural Analysis of Substrate Promiscuity in Plant Mg(2+)-Dependent O-Methyltransferases., Kopycki JG, Rauh D, Chumanevich AA, Neumann P, Vogt T, Stubbs MT, J Mol Biol. 2008 Feb 20;. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18342334 18342334]
</div>
[[Category: Caffeoyl-CoA O-methyltransferase]]
<div class="pdbe-citations 3c3y" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mesembryanthemum crystallinum]]
[[Category: Mesembryanthemum crystallinum]]
[[Category: Single protein]]
[[Category: Kopycki JG]]
[[Category: Kopycki, J G.]]
[[Category: Neumann P]]
[[Category: Neumann, P.]]
[[Category: Rauh D]]
[[Category: Rauh, D.]]
[[Category: Stubbs MT]]
[[Category: Stubbs, M T.]]
[[Category: o-methyltransferase]]
[[Category: plant secondary metabolism]]
 
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