Search results
Results From The WOW.Com Content Network
In enzymology, a NAD + glycohydrolase (EC 3.2.2.5) is an enzyme that catalyzes the chemical reaction NAD + + H 2 O ⇌ {\displaystyle \rightleftharpoons } ADP-ribose + nicotinamide Thus, the two substrates of this enzyme are NAD + and H 2 O , whereas its two products are ADP-ribose and nicotinamide .
NAD + + peptide diphthamide nicotinamide + peptide N-(ADP-D-ribosyl)diphthamide Thus, the two substrates of this enzyme are NAD + and peptide diphthamide , whereas its two products are nicotinamide and peptide N-(ADP-D-ribosyl)diphthamide .
Some NAD is converted into the coenzyme nicotinamide adenine dinucleotide phosphate (NADP), whose chemistry largely parallels that of NAD, though its predominant role is as a coenzyme in anabolic metabolism. In the name NAD +, the superscripted plus sign indicates the positive formal charge on one of its nitrogen atoms. A biological coenzyme ...
NAD + kinase (EC 2.7.1.23, NADK) is an enzyme that converts nicotinamide adenine dinucleotide (NAD +) into NADP + through phosphorylating the NAD + coenzyme. [6] NADP + is an essential coenzyme that is reduced to NADPH primarily by the pentose phosphate pathway to provide reducing power in biosynthetic processes such as fatty acid biosynthesis and nucleotide synthesis. [7]
In general, the NAD is not stably associated with the enzyme, being a coenzyme; hence, we call such enzymes "NADH-dependent" enzymes, rather than simply "NADH enzymes". By contrast, more stably bound ligands such as heme or iron-sulfur clusters are cofactors ; thus, one speaks of "heme enzymes" or " iron-sulfur proteins ".
D-glucose + NAD + D-glucono-1,5-lactone + NADH + H + Thus, the two substrates of this enzyme are D-glucose and NAD + , whereas its 3 products are D-glucono-1,5-lactone , NADH , and H + . This enzyme belongs to the family of oxidoreductases , specifically those acting on the CH-OH group of donor with NAD + or NADP + as acceptor.
an aldehyde + NAD + + H 2 O an acid + NADH + H + The 3 substrates of this enzyme are aldehyde , NAD + , and H 2 O , whereas its 3 products are acid , NADH , and H + . This enzyme belongs to the family of oxidoreductases , specifically those acting on the aldehyde or oxo group of donor with NAD+ or NADP+ as acceptor.
In enzymology, a NAD + diphosphatase (EC 3.6.1.22) is an enzyme that catalyzes the chemical reaction NAD + + H 2 O ⇌ {\displaystyle \rightleftharpoons } AMP + NMN Thus, the two substrates of this enzyme are NAD + and H 2 O , whereas its two products are AMP and NMN .