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<p></p> <p><b>New page</b></p><div>{{Infobox enzyme<br /> | Name = 2,5-diamino-6-(ribosylamino)-4(3H)-pyrimidinone 5&#039;-phosphate reductase<br /> | EC_number = 1.1.1.302<br /> | CAS_number = <br /> | IUBMB_EC_number = 1/1/1/302<br /> | GO_code = <br /> | image = <br /> | width = <br /> | caption =<br /> }}<br /> &#039;&#039;&#039;2,5-diamino-6-(ribosylamino)-4(3H)-pyrimidinone 5&#039;-phosphate reductase&#039;&#039;&#039; ({{EC number|1.1.1.302}}, &#039;&#039;2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5&#039;-phosphate reductase&#039;&#039;, &#039;&#039;MjaRED&#039;&#039;, &#039;&#039;MJ0671 (gene)&#039;&#039;) is an [[enzyme]] with system name &#039;&#039;2,5-diamino-6-(5-phospho-D-ribosylamino)pyrimidin-4(3H)-one:NAD(P)&lt;sup&gt;+&lt;/sup&gt; oxidoreductase&#039;&#039;.&lt;ref&gt;{{cite journal | title = The pyrimidine nucleotide reductase step in riboflavin and F&lt;sub&gt;420&lt;/sub&gt; biosynthesis in archaea proceeds by the eukaryotic route to riboflavin |author = Graupner, M., Xu, H. and White, R.H. |journal = J. Bacteriol. |year = 2002 |volume = 184 |pages = 1952–1957 |pmid = 11889103 | doi = 10.1128/JB.184.7.1952-1957.2002 | issue = 7 | pmc = 134922}}&lt;/ref&gt;&lt;ref&gt;{{cite journal | title = Biosynthesis of riboflavin: structure and properties of 2,5-diamino-6-ribosylamino-4(3&#039;&#039;H&#039;&#039;)-pyrimidinone 5&amp;prime;-phosphate reductase of &#039;&#039;Methanocaldococcus jannaschii&#039;&#039; |author = Chatwell, L., Krojer, T., Fidler, A., Romisch, W., Eisenreich, W., Bacher, A., Huber, R. and Fischer, M. |journal = J. Mol. Biol. |year = 2006 |volume = 359 |pages = 1334–1351 |pmid = 16730025 | doi = 10.1016/j.jmb.2006.04.045 | issue = 5}}&lt;/ref&gt; This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]<br /> <br /> : 2,5-diamino-6-(5-phospho-D-ribitylamino)pyrimidin-4(3H)-one + NAD(P)&lt;sup&gt;+&lt;/sup&gt; &lt;math&gt;\rightleftharpoons&lt;/math&gt; 2,5-diamino-6-(5-phospho-D-ribosylamino)pyrimidin-4(3H)-one + NAD(P)H + H&lt;sup&gt;+&lt;/sup&gt;<br /> <br /> The reaction proceeds in the opposite direction. A step in [[riboflavin]] biosynthesis, NADPH and NADH functions equally well as a [[reductant]].<br /> <br /> == References ==<br /> {{reflist}}<br /> <br /> == External links ==<br /> * {{MeshName|2,5-diamino-6-(ribosylamino)-4(3H)-pyrimidinone+5&#039;-phosphate+reductase}}<br /> <br /> [[Category:EC 1.1.1]]<br /> <br /> <br /> {{enzyme-stub}}</div>

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