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1hmy

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[[Image:1hmy.jpg|left|200px]]
 
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{{Structure
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==CRYSTAL STRUCTURE OF THE HHAI DNA METHYLTRANSFERASE COMPLEXED WITH S-ADENOSYL-L-METHIONINE==
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|PDB= 1hmy |SIZE=350|CAPTION= <scene name='initialview01'>1hmy</scene>, resolution 2.5&Aring;
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<StructureSection load='1hmy' size='340' side='right'caption='[[1hmy]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene>
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<table><tr><td colspan='2'>[[1hmy]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Haemophilus_haemolyticus Haemophilus haemolyticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HMY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HMY FirstGlance]. <br>
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|ACTIVITY= [http://en.wikipedia.org/wiki/DNA_(cytosine-5-)-methyltransferase DNA (cytosine-5-)-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.37 2.1.1.37]
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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]] 2.5&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene></td></tr>
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}}
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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=1hmy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hmy OCA], [https://pdbe.org/1hmy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hmy RCSB], [https://www.ebi.ac.uk/pdbsum/1hmy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hmy ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/MTH1_HAEPH MTH1_HAEPH] This methylase recognizes the double-stranded sequence GCGC, causes specific methylation on C-2 on both strands, and protects the DNA from cleavage by the HhaI endonuclease.
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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/hm/1hmy_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=1hmy ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE OF THE HHAL DNA METHYLTRANSFERASE COMPLEXED WITH S-ADENOSYL-L-METHIONINE'''
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==See Also==
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*[[DNA methyltransferase 3D structures|DNA methyltransferase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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The first three-dimensional structure of a DNA methyltransferase is presented. The crystal structure of the DNA (cytosine-5)-methyltransferase, M.HhaI (recognition sequence: GCGC), complexed with S-adenosyl-L-methionine has been determined and refined at 2.5 A resolution. The core of the structure is dominated by sequence motifs conserved among all DNA (cytosine-5)-methyltransferases, and these are responsible for cofactor binding and methyltransferase function.
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==About this Structure==
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1HMY is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Haemophilus_haemolyticus Haemophilus haemolyticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HMY OCA].
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==Reference==
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Crystal structure of the HhaI DNA methyltransferase complexed with S-adenosyl-L-methionine., Cheng X, Kumar S, Posfai J, Pflugrath JW, Roberts RJ, Cell. 1993 Jul 30;74(2):299-307. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8343957 8343957]
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[[Category: DNA (cytosine-5-)-methyltransferase]]
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[[Category: Haemophilus haemolyticus]]
[[Category: Haemophilus haemolyticus]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Cheng, X.]]
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[[Category: Cheng X]]
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[[Category: SAM]]
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[[Category: transferase(methyltransferase)]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:39:07 2008''
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Current revision

CRYSTAL STRUCTURE OF THE HHAI DNA METHYLTRANSFERASE COMPLEXED WITH S-ADENOSYL-L-METHIONINE

PDB ID 1hmy

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