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2p0e

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{{STRUCTURE_2p0e| PDB=2p0e | SCENE= }}
{{STRUCTURE_2p0e| PDB=2p0e | SCENE= }}
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'''Human nicotinamide riboside kinase 1 in complex with tiazofurin'''
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===Human nicotinamide riboside kinase 1 in complex with tiazofurin===
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==Overview==
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The eukaryotic nicotinamide riboside kinase (Nrk) pathway, which is induced in response to nerve damage and promotes replicative life span in yeast, converts nicotinamide riboside to nicotinamide adenine dinucleotide (NAD+) by phosphorylation and adenylylation. Crystal structures of human Nrk1 bound to nucleoside and nucleotide substrates and products revealed an enzyme structurally similar to Rossmann fold metabolite kinases and allowed the identification of active site residues, which were shown to be essential for human Nrk1 and Nrk2 activity in vivo. Although the structures account for the 500-fold discrimination between nicotinamide riboside and pyrimidine nucleosides, no enzyme feature was identified to recognize the distinctive carboxamide group of nicotinamide riboside. Indeed, nicotinic acid riboside is a specific substrate of human Nrk enzymes and is utilized in yeast in a novel biosynthetic pathway that depends on Nrk and NAD+ synthetase. Additionally, nicotinic acid riboside is utilized in vivo by Urh1, Pnp1, and Preiss-Handler salvage. Thus, crystal structures of Nrk1 led to the identification of new pathways to NAD+.
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{{ABSTRACT_PUBMED_17914902}}
==About this Structure==
==About this Structure==
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[[Category: Tiazofurin]]
[[Category: Tiazofurin]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 12:03:34 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 18:44:38 2008''

Revision as of 15:44, 27 July 2008

Image:2p0e.png

Template:STRUCTURE 2p0e

Human nicotinamide riboside kinase 1 in complex with tiazofurin

Template:ABSTRACT PUBMED 17914902

About this Structure

2P0E is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Nicotinamide riboside kinase structures reveal new pathways to NAD+., Tempel W, Rabeh WM, Bogan KL, Belenky P, Wojcik M, Seidle HF, Nedyalkova L, Yang T, Sauve AA, Park HW, Brenner C, PLoS Biol. 2007 Oct 2;5(10):e263. PMID:17914902

Page seeded by OCA on Sun Jul 27 18:44:38 2008

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