Pantothenate kinase (PanK; CoaA) is the first enzyme in the Coenzyme A biosynthetic pathway. It phophorylates pantothenate (vitamin B5) to form 4'-phosphopantothenate.
Three distinct types of PanK has been identified - PanK-I (found in bacteria), PanK-II (mainly found in eukaryotes, but also in the Staphylococci) and PanK-III, also known as CoaX (found in bacteria). Eukaryotic PanK-II enzymes often occur as different isoforms, such as PanK1, PanK2, PanK3 and PanK4.
PANK2 is associated with Pantothenate kinase-associated neurodegeneration, formerly called Hallervorden-Spatz syndrome. it also leads to brain fever and finally leads to death
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