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2azn

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[[Image:2azn.gif|left|200px]]
[[Image:2azn.gif|left|200px]]
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{{Structure
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|PDB= 2azn |SIZE=350|CAPTION= <scene name='initialview01'>2azn</scene>, resolution 2.7&Aring;
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The line below this paragraph, containing "STRUCTURE_2azn", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <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=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <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>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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{{STRUCTURE_2azn| PDB=2azn | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<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.ebi.ac.uk/pdbsum/2azn PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2azn RCSB]</span>
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'''X-RAY Structure of 2,5-diamino-6-ribosylamino-4(3h)-pyrimidinone 5-phosphate reductase'''
'''X-RAY Structure of 2,5-diamino-6-ribosylamino-4(3h)-pyrimidinone 5-phosphate reductase'''
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==Reference==
==Reference==
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:[http://www.ncbi.nlm.nih.gov/pubmed/16730025 16730025]
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:[http://www.ncbi.nlm.nih.gov/pubmed/16730025 16730025]
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[[Category: 5-amino-6-(5-phosphoribosylamino)uracil reductase]]
 
[[Category: Methanocaldococcus jannaschii]]
[[Category: Methanocaldococcus jannaschii]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: Huber, R.]]
[[Category: Huber, R.]]
[[Category: Krojer, T.]]
[[Category: Krojer, T.]]
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[[Category: oxidoreductase]]
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[[Category: Oxidoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:40:07 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:59:29 2008''
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Revision as of 16:40, 3 May 2008

Image:2azn.gif

Template:STRUCTURE 2azn

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


Overview

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.

About this Structure

2AZN is a Single protein structure of sequence from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA.

Reference

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 Page seeded by OCA on Sat May 3 19:40:07 2008

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