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1nvk

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[[Image:1nvk.jpg|left|200px]]
 
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==T4 phage BGT in complex with UDP and a Mn2+ ion at 1.8 A resolution==
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The line below this paragraph, containing "STRUCTURE_1nvk", creates the "Structure Box" on the page.
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<StructureSection load='1nvk' size='340' side='right'caption='[[1nvk]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1nvk]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_T4 Escherichia virus T4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NVK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NVK FirstGlance]. <br>
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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]] 1.8&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=UDP:URIDINE-5-DIPHOSPHATE'>UDP</scene></td></tr>
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{{STRUCTURE_1nvk| PDB=1nvk | SCENE= }}
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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=1nvk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nvk OCA], [https://pdbe.org/1nvk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nvk RCSB], [https://www.ebi.ac.uk/pdbsum/1nvk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nvk ProSAT]</span></td></tr>
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</table>
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'''T4 phage BGT in complex with UDP and a Mn2+ ion at 1.8 A resolution'''
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== Function ==
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[https://www.uniprot.org/uniprot/GSTB_BPT4 GSTB_BPT4] Catalyzes the transfer of glucose (Glc) from uridine diphosphoglucose (UDP-Glc) to 5-hydroxymethylcytosine (5-HMC) in double-stranded DNA. Is involved in a DNA modification process to protect the phage genome against its own nucleases and the host restriction endonuclease system.
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__TOC__
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==Overview==
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</StructureSection>
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T4 phage beta-glucosyltransferase (BGT) is an inverting glycosyltransferase (GT) that transfers glucose from uridine diphospho-glucose (UDP-glucose) to an acceptor modified DNA. BGT belongs to the GT-B structural superfamily, represented, so far, by five different inverting or retaining GT families. Here, we report three high-resolution X-ray structures of BGT and a point mutant solved in the presence of UDP-glucose. The two co-crystal structures of the D100A mutant show that, unlike the wild-type enzyme, this mutation prevents glucose hydrolysis. This strongly indicates that Asp100 is the catalytic base. We obtained the wild-type BGT-UDP-glucose complex by soaking substrate-free BGT crystals. Comparison with a previous structure of BGT solved in the presence of the donor product UDP and an acceptor analogue provides the first model of an inverting GT-B enzyme in which both the donor and acceptor substrates are bound to the active site. The structural analyses support the in-line displacement reaction mechanism previously proposed, locate residues involved in donor substrate specificity and identify the catalytic base.
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[[Category: Escherichia virus T4]]
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[[Category: Large Structures]]
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==About this Structure==
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[[Category: Gueguen-Chaignon V]]
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1NVK is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Enterobacteria_phage_t4 Enterobacteria phage t4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NVK OCA].
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[[Category: Kurzeck J]]
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[[Category: Lariviere L]]
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==Reference==
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[[Category: Morera S]]
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Crystal structures of the T4 phage beta-glucosyltransferase and the D100A mutant in complex with UDP-glucose: glucose binding and identification of the catalytic base for a direct displacement mechanism., Lariviere L, Gueguen-Chaignon V, Morera S, J Mol Biol. 2003 Jul 25;330(5):1077-86. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12860129 12860129]
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[[Category: Rueger W]]
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[[Category: DNA beta-glucosyltransferase]]
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[[Category: Enterobacteria phage t4]]
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[[Category: Single protein]]
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[[Category: Gueguen-Chaignon, V.]]
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[[Category: Kurzeck, J.]]
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[[Category: Lariviere, L.]]
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[[Category: Morera, S.]]
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[[Category: Rueger, W.]]
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[[Category: Glycosyltransferase]]
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[[Category: Gt-b]]
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[[Category: Mn]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:01:52 2008''
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Current revision

T4 phage BGT in complex with UDP and a Mn2+ ion at 1.8 A resolution

PDB ID 1nvk

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