1m0e

<table><tr><td colspan='2'>[[1m0e]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_x"_pritchett_and_stillman_1919 "bacillus x" pritchett and stillman 1919]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M0E OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M0E FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr>

<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=Z:1-(2-DEOXY-5-O-PHOSPHONO-BETA-D-ERYTHRO-PENTOFURANOSYL)PYRIMIDIN-2(1H)-ONE'>Z</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/DNA_(cytosine-5-)-methyltransferase DNA (cytosine-5-)-methyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.37 2.1.1.37] </span></td></tr>

[[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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== Publication Abstract from PubMed ==

Mechanism-based inhibitors of enzymes, which mimic reactive intermediates in the reaction pathway, have been deployed extensively in the analysis of metabolic pathways and as candidate drugs. The inhibition of cytosine-[C5]-specific DNA methyltransferases (C5 MTases) by oligodeoxynucleotides containing 5-azadeoxycytidine (AzadC) and 5-fluorodeoxycytidine (FdC) provides a well-documented example of mechanism-based inhibition of enzymes central to nucleic acid metabolism. Here, we describe the interaction between the C5 MTase from Haemophilus haemolyticus (M.HhaI) and an oligodeoxynucleotide duplex containing 2-H pyrimidinone, an analogue often referred to as zebularine and known to give rise to high-affinity complexes with MTases. X-ray crystallography has demonstrated the formation of a covalent bond between M.HhaI and the 2-H pyrimidinone-containing oligodeoxynucleotide. This observation enables a comparison between the mechanisms of action of 2-H pyrimidinone with other mechanism-based inhibitors such as FdC. This novel complex provides a molecular explanation for the mechanism of action of the anti-cancer drug zebularine.

Zebularine: a novel DNA methylation inhibitor that forms a covalent complex with DNA methyltransferases.,Zhou L, Cheng X, Connolly BA, Dickman MJ, Hurd PJ, Hornby DP J Mol Biol. 2002 Aug 23;321(4):591-9. PMID:12206775<ref>PMID:12206775</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 1m0e" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bacillus x pritchett and stillman 1919]]

[[Category: Cheng, X]]

[[Category: Connolly, B A]]

[[Category: Dickman, M J]]

[[Category: Hornby, D P]]

[[Category: Hurd, P J]]

[[Category: Zhou, L]]

[[Category: Zebularine]]