1wa4

<table><tr><td colspan='2'>[[1wa4]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/"streptomyces_orientalis"_pittenger_and_brigham_1956 "streptomyces orientalis" pittenger and brigham 1956]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WA4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WA4 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1ofn|1ofn]], [[1oi6|1oi6]]</div></td></tr>

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== Publication Abstract from PubMed ==

Vancomycin, the last line of defense antibiotic, depends upon the attachment of the carbohydrate vancosamine to an aglycone skeleton for antibacterial activity. Vancomycin is a naturally occurring secondary metabolite that can be produced by bacterial fermentation. To combat emerging resistance, it has been proposed to genetically engineer bacteria to produce analogues of vancomycin. This requires a detailed understanding of the biochemical steps in the synthesis of vancomycin. Here we report the 1.4 A structure and biochemical characterization of EvaD, an RmlC-like protein that is required for the C-5' epimerization during synthesis of dTDP-epivancosamine. EvaD, although clearly belonging to the RmlC class of enzymes, displays very low activity in the archetypal RmlC reaction (double epimerization of dTDP-6-deoxy-4-keto-D-glucose at C-3' and C-5'). The high resolution structure of EvaD compared with the structures of authentic RmlC enzymes indicates that a subtle change in the enzyme active site repositions a key catalytic Tyr residue. A mutant designed to re-establish the normal position of the Tyr increases the RmlC-like activity of EvaD.

The position of a key tyrosine in dTDP-4-Keto-6-deoxy-D-glucose-5-epimerase (EvaD) alters the substrate profile for this RmlC-like enzyme.,Merkel AB, Major LL, Errey JC, Burkart MD, Field RA, Walsh CT, Naismith JH J Biol Chem. 2004 Jul 30;279(31):32684-91. Epub 2004 May 24. PMID:15159413<ref>PMID:15159413</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Streptomyces orientalis pittenger and brigham 1956]]

[[Category: Merkel, A B]]

[[Category: Naismith, J H]]

[[Category: Orf24]]