Roles of Nicotinamide Adenine Dinucleotide (NAD+) in Biological Systems
AbstractNAD+ has emerged as a crucial element in both bioenergetic and signaling pathways since it acts as a key regulator of cellular and organism homeostasis. NAD+ is a coenzyme in redox reactions, a donor of adenosine diphosphate-ribose (ADPr) moieties in ADP-ribosylation reactions, a substrate for sirtuins, a group of histone deacetylase enzymes that use NAD+ to remove acetyl groups from proteins; NAD+ is also a precursor of cyclic ADP-ribose, a second messenger in Ca++ release and signaling, and of diadenosine tetraphosphate (Ap4A) and oligoadenylates (oligo2′-5′A), two immune response activating compounds. In the biological systems considered in this review, NAD+ is mostly consumed in ADP-ribose (ADPr) transfer reactions. In this review the roles of these chemical products are discussed in biological systems, such as in animals, plants, fungi and bacteria. In the review, two types of ADP-ribosylating enzymes are introduced as well as the pathways to restore the NAD+ pools in these systems. View Full-Text
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Poltronieri, P.; Čerekovic, N. Roles of Nicotinamide Adenine Dinucleotide (NAD+) in Biological Systems. Challenges 2018, 9, 3.
Poltronieri P, Čerekovic N. Roles of Nicotinamide Adenine Dinucleotide (NAD+) in Biological Systems. Challenges. 2018; 9(1):3.Chicago/Turabian Style
Poltronieri, Palmiro; Čerekovic, Nataša. 2018. "Roles of Nicotinamide Adenine Dinucleotide (NAD+) in Biological Systems." Challenges 9, no. 1: 3.
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