1q0t

<StructureSection load='1q0t' size='340' side='right' caption='[[1q0t]], [[Resolution|resolution]] 3.10&Aring;' scene=''>

<table><tr><td colspan='2'>[[1q0t]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bpt4 Bpt4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q0T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q0T FirstGlance]. <br>

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

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1q0s|1q0s]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DAM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10665 BPT4])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Site-specific_DNA-methyltransferase_(adenine-specific) Site-specific DNA-methyltransferase (adenine-specific)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.72 2.1.1.72] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q0t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q0t OCA], [http://pdbe.org/1q0t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q0t RCSB], [http://www.ebi.ac.uk/pdbsum/1q0t PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/DMA_BPT4 DMA_BPT4]] This methylase recognizes the double-stranded sequence GATC, causes specific methylation on A-2 on both strands.

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== Publication Abstract from PubMed ==

DNA-adenine methylation at certain GATC sites plays a pivotal role in bacterial and phage gene expression as well as bacterial virulence. We report here the crystal structures of the bacteriophage T4Dam DNA adenine methyltransferase (MTase) in a binary complex with the methyl-donor product S-adenosyl-L-homocysteine (AdoHcy) and in a ternary complex with a synthetic 12-bp DNA duplex and AdoHcy. T4Dam contains two domains: a seven-stranded catalytic domain that harbors the binding site for AdoHcy and a DNA binding domain consisting of a five-helix bundle and a beta-hairpin that is conserved in the family of GATC-related MTase orthologs. Unexpectedly, the sequence-specific T4Dam bound to DNA in a nonspecific mode that contained two Dam monomers per synthetic duplex, even though the DNA contains a single GATC site. The ternary structure provides a rare snapshot of an enzyme poised for linear diffusion along the DNA.

Structure of the bacteriophage T4 DNA adenine methyltransferase.,Yang Z, Horton JR, Zhou L, Zhang XJ, Dong A, Zhang X, Schlagman SL, Kossykh V, Hattman S, Cheng X Nat Struct Biol. 2003 Oct;10(10):849-55. Epub 2003 Aug 24. PMID:12937411<ref>PMID:12937411</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 1q0t" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bpt4]]

[[Category: Cheng, X]]

[[Category: Dong, A]]

[[Category: Hattman, S]]

[[Category: Horton, J R]]

[[Category: Kossykh, V]]

[[Category: Schlagman, S L]]

[[Category: Yang, Z]]

[[Category: Zhang, X]]

[[Category: Zhang, X J]]

[[Category: Zhou, L]]

[[Category: Transferase-dna complex]]