2azn

From Proteopedia

(Difference between revisions)

Revision as of 04:34, 11 September 2015

X-RAY Structure of 2,5-diamino-6-ribosylamino-4(3h)-pyrimidinone 5-phosphate reductase

Structural highlights

2azn is a 6 chain structure with sequence from Atcc 43067. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
NonStd Res:
Activity:	5-amino-6-(5-phosphoribosylamino)uracil reductase, with EC number 1.1.1.193
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[RIB7_METJA] Catalyzes an early step in riboflavin biosynthesis, the NAD(P)H-dependent reduction of the ribose side chain of 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate, yielding 2,5-diamino-6-ribitylamino-4(3H)-pyrimidinone 5'-phosphate. The beta anomer is the authentic substrate, and the alpha anomer can serve as substrate subsequent to spontaneous anomerization. NADPH and NADH function equally well as the reductants. Does not catalyze the reduction of 5-amino-6-(5-phospho-D-ribosylamino)uracil to 5-amino-6-(5-phospho-D-ribitylamino)uracil.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The pyrimidine reductase of the riboflavin biosynthetic pathway (MjaRED) specified by the open reading frame MJ0671 of Methanocaldococcus jannaschii was expressed in Escherichia coli using a synthetic gene. The synthetic open reading frame that was optimized for expression in E. coli directed the synthesis of abundant amounts of the enzyme with an apparent subunit mass of 25 kDa. The enzyme was purified to apparent homogeneity and was shown to catalyze the conversion of 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate into 2,5-diamino-6-ribitylamino-4(3H)-pyrimidinone 5'-phosphate at a rate of 0.8 micromol min(-1) mg(-1) at pH 8.0 and at 30 degrees C. The protein is a homodimer as shown by sedimentation equilibrium analysis and sediments at an apparent velocity of 3.5 S. The structure of the enzyme in complex with the cofactor nicotinamide adenine dinucleotide phosphate was determined by X-ray crystallography at a resolution of 2.5 Angstroms. The folding pattern resembles that of dihydrofolate reductase with the Thermotoga maritima ortholog as the most similar structure. The substrate, 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate, was modeled into the putative active site. The model suggests the transfer of the pro-R hydrogen of C-4 of NADPH to C-1' of the substrate.

Biosynthesis of riboflavin: structure and properties of 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate reductase of Methanocaldococcus jannaschii.,Chatwell L, Krojer T, Fidler A, Romisch W, Eisenreich W, Bacher A, Huber R, Fischer M J Mol Biol. 2006 Jun 23;359(5):1334-51. Epub 2006 May 6. PMID:16730025^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Graupner M, Xu H, White RH. The pyrimidine nucleotide reductase step in riboflavin and F(420) biosynthesis in archaea proceeds by the eukaryotic route to riboflavin. J Bacteriol. 2002 Apr;184(7):1952-7. PMID:11889103
↑ Romisch-Margl W, Eisenreich W, Haase I, Bacher A, Fischer M. 2,5-diamino-6-ribitylamino-4(3H)-pyrimidinone 5'-phosphate synthases of fungi and archaea. FEBS J. 2008 Sep;275(17):4403-14. doi: 10.1111/j.1742-4658.2008.06586.x. Epub, 2008 Jul 30. PMID:18671734 doi:http://dx.doi.org/10.1111/j.1742-4658.2008.06586.x
↑ Chatwell L, Krojer T, Fidler A, Romisch W, Eisenreich W, Bacher A, Huber R, Fischer M. Biosynthesis of riboflavin: structure and properties of 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate reductase of Methanocaldococcus jannaschii. J Mol Biol. 2006 Jun 23;359(5):1334-51. Epub 2006 May 6. PMID:16730025 doi:10.1016/j.jmb.2006.04.045

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2azn"

@@ Line 2: / Line 2: @@
 <StructureSection load='2azn' size='340' side='right' caption='[[2azn]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2azn]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AZN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2AZN FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2azn]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43067 Atcc 43067]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AZN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2AZN FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE+ETHANESULFONIC+ACID'>EPE</scene>, <scene name='pdbligand=MA5:2-(6-(2-CYCLOHEXYLETHOXY)-TETRAHYDRO-4,5-DIHYDROXY-2(HYDROXYMETHYL)-2H-PYRAN-3-YLOXY)-TETRAHYDRO-6(HYDROXYMETHYL)-2H-PYRAN-3,4,5-TRIOL'>MA5</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/5-amino-6-(5-phosphoribosylamino)uracil_reductase 5-amino-6-(5-phosphoribosylamino)uracil reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.193 1.1.1.193] </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=2azn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2azn OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2azn RCSB], [http://www.ebi.ac.uk/pdbsum/2azn PDBsum]</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=2azn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2azn OCA], [http://pdbe.org/2azn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2azn RCSB], [http://www.ebi.ac.uk/pdbsum/2azn PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2azn" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Methanocaldococcus jannaschii]]
+[[Category: Atcc 43067]]
 [[Category: Bacher, A]]
 [[Category: Chatwell, L]]

2azn

From Proteopedia

Revision as of 04:34, 11 September 2015

X-RAY Structure of 2,5-diamino-6-ribosylamino-4(3h)-pyrimidinone 5-phosphate reductase

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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