Pantothenic acid pathway enzymes

Pantothenic acid pathway enzymes are responsible for the multistep biosynthesis of coenzyme A from pantothenic acid (vitamin B5), requiring ATP and contributing to essential cellular functions such as energy metabolism, fatty acid synthesis, signal transduction, and synthesis of hormones and neurotransmitters. The main enzymes include pantothenate kinase, phosphopantothenoylcysteine synthetase, phosphopantothenoylcysteine decarboxylase, phosphopantetheine adenylyl transferase, and dephosphocoenzyme A kinase. These enzymes are vital in all living organisms, and dysfunction can lead to metabolic and neurodegenerative diseases such as PKAN. For therapeutic targeting and clinical relevance, specific enzymes (most notably pantothenate kinase) are more commonly addressed than the entire pathway as a unit. If "pantothenic acid pathway enzymes" is encountered as a drug target, it is usually necessary to identify the specific enzyme, most often pantothenate kinase (PANK/PANK2), as the explicit target for structured pharmacological or clinical data. The entry here describes the class of enzymes responsible for the conversion of pantothenic acid to coenzyme A, not a single molecular entity.

Other names

Enzymes of the pantothenic acid pathwayCoenzyme A biosynthetic enzymesVitamin B5 metabolic enzymesPantothenate pathway enzymes

Enzyme activation or inhibition (e.g., increasing CoA synthesis or blocking pathway intermediates); Substrate competition (end-product inhibition by CoA against pantothenate kinase)