triphosphopyridine nucleotide
Noun: A coenzyme form of niacin (nicotinamide adenine dinucleotide phosphate, NADP⁺) that functions as an electron carrier in numerous anabolic biochemical reactions, such as lipid and nucleic acid synthesis. It primarily accepts and donates electrons (hydrogen atoms) in its reduced state (NADPH).
This is a specialized biochemical term. It is used in scientific contexts to refer to a specific molecule essential for cellular metabolism.
Examples: * The enzyme glucose-6-phosphate dehydrogenase produces reduced triphosphopyridine nucleotide (NADPH). * Triphosphopyridine nucleotide is a crucial electron donor in biosynthetic pathways. * The ratio of oxidized to reduced triphosphopyridine nucleotide affects cellular redox state.
- Abbreviation: Almost exclusively abbreviated as NADP⁺ (oxidized form) or NADPH (reduced form) in modern scientific literature. The full term "triphosphopyridine nucleotide" is now considered archaic but is important for historical context.
- Functional Context: Typically discussed in relation to its role in the pentose phosphate pathway, photosynthesis (as NADPH), and antioxidant defense systems.
- NADP⁺ / NADPH: The modern and standard abbreviations for triphosphopyridine nucleotide (oxidized and reduced forms, respectively).
- Nicotinamide adenine dinucleotide phosphate: The systematic chemical name.
- Coenzyme: The general class of organic non-protein molecules to which triphosphopyridine nucleotide belongs.
- Pyridine nucleotide: The broader family of coenzymes that includes this molecule and its relative, diphosphopyridine nucleotide (NAD⁺).
- NADP⁺ (for the oxidized form)
- NADPH (for the reduced form)
- Nicotinamide adenine dinucleotide phosphate (formal synonym)
This term has only one specific meaning in biochemistry. Its usage is technical and precise, referring to the identical molecule described by its modern name, NADP⁺.
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a coenzyme of several enzymes
