View source for 5u2n


==Crystal structure of human NAMPT with A-1326133==
<StructureSection load='5u2n' size='340' side='right'caption='[[5u2n]], [[Resolution|resolution]] 1.73&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5u2n]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U2N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5U2N FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.73&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=7TA:N-{4-[1-(2-methylpropanoyl)piperidin-4-yl]phenyl}-2H-pyrrolo[3,4-c]pyridine-2-carboxamide'>7TA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5u2n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u2n OCA], [https://pdbe.org/5u2n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5u2n RCSB], [https://www.ebi.ac.uk/pdbsum/5u2n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5u2n ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NAMPT_HUMAN NAMPT_HUMAN] Catalyzes the condensation of nicotinamide with 5-phosphoribosyl-1-pyrophosphate to yield nicotinamide mononucleotide, an intermediate in the biosynthesis of NAD. It is the rate limiting component in the mammalian NAD biosynthesis pathway (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cancer cells are highly reliant on NAD+-dependent processes, including glucose metabolism, calcium signaling, DNA repair, and regulation of gene expression. Nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme for NAD+ salvage from nicotinamide, has been investigated as a target for anticancer therapy. Known NAMPT inhibitors with potent cell activity are composed of a nitrogen-containing aromatic group, which is phosphoribosylated by the enzyme. Here, we identified two novel types of NAM-competitive NAMPT inhibitors, only one of which contains a modifiable, aromatic nitrogen that could be a phosphoribosyl acceptor. Both types of compound effectively deplete cellular NAD+, and subsequently ATP, and produce cell death when NAMPT is inhibited in cultured cells for more than 48 hours. Careful characterization of the kinetics of NAMPT inhibition in vivo allowed us to optimize dosing to produce sufficient NAD+ depletion over time that resulted in efficacy in an HCT116 xenograft model. Our data demonstrate that direct phosphoribosylation of competitive inhibitors by the NAMPT enzyme is not required for potent in vitro cellular activity or in vivo antitumor efficacy. Mol Cancer Ther; 16(7); 1236-45. (c)2017 AACR.

Discovery and Characterization of Novel Nonsubstrate and Substrate NAMPT Inhibitors.,Wilsbacher JL, Cheng M, Cheng D, Trammell SAJ, Shi Y, Guo J, Koeniger SL, Kovar PJ, He Y, Selvaraju S, Heyman HR, Sorensen BK, Clark RF, Hansen TM, Longenecker KL, Raich D, Korepanova AV, Cepa S, Towne DL, Abraham VC, Tang H, Richardson PL, McLoughlin SM, Badagnani I, Curtin ML, Michaelides MR, Maag D, Buchanan FG, Chiang GG, Gao W, Rosenberg SH, Brenner C, Tse C Mol Cancer Ther. 2017 Jul;16(7):1236-1245. doi: 10.1158/1535-7163.MCT-16-0819., Epub 2017 May 3. PMID:28468779<ref>PMID:28468779</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5u2n" style="background-color:#fffaf0;"></div>

==See Also==
*[[Phosphoribosyltransferase 3D structures|Phosphoribosyltransferase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Korepanova AV]]
[[Category: Longenecker KL]]
[[Category: Raich D]]