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Nicotinamide riboside (NR, SR647) is a pyridine-nucleoside and a form of vitamin B 3. It functions as a precursor to nicotinamide adenine dinucleotide , or NAD+ , [ 2 ] through a two-step and a three-step pathway.
Vitamin B 3, colloquially referred to as niacin, is a vitamin family that includes three forms, or vitamers: nicotinic acid (niacin), nicotinamide (niacinamide), and nicotinamide riboside. [1] [2] All three forms of vitamin B 3 are converted within the body to nicotinamide adenine dinucleotide (NAD).
Nicotinamide (INN, BAN UK [2]) or niacinamide (USAN US) is a form of vitamin B 3 found in food and used as a dietary supplement and medication. [ 3 ] [ 4 ] [ 5 ] As a supplement, it is used orally (swallowed by mouth) to prevent and treat pellagra (niacin deficiency). [ 4 ]
The Nicotinamide Ribonucleoside (NR) Uptake Permease (PnuC) Family is a family of transmembrane transporters that is part of the TOG superfamily. [1] Close PnuC homologues are found in a wide range of Gram-negative and Gram-positive bacteria , archaea and eukaryotes .
The three vitamin precursors used in these salvage metabolic pathways are nicotinic acid (NA), nicotinamide (Nam) and nicotinamide riboside (NR). [6] These compounds can be taken up from the diet and are termed vitamin B 3 or niacin. However, these compounds are also produced within cells and by digestion of cellular NAD +.
10135 59027 Ensembl ENSG00000105835 ENSMUSG00000020572 UniProt P43490 Q99KQ4 RefSeq (mRNA) NM_005746 NM_182790 NM_021524 RefSeq (protein) NP_005737 NP_067499 Location (UCSC) Chr 7: 106.25 – 106.29 Mb Chr 12: 32.87 – 32.9 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse nicotinamide phosphoribosyltransferase Identifiers EC no. 2.4.2.12 CAS no. 9030-27-7 Databases IntEnz IntEnz view ...
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