In vertebrates there are four major glucose-phosphorylating isoenzymes, designated hexokinase I, II, III, and IV. Hexokinase activity is involved in the first step in several metabolic pathways including phosphorylation of glucose to produce glucose-6-phosphate, thus committing glucose to the glycolytic pathway. Hexokinase is an allosteric enzyme inhibited by its product GLC-6-P. Hexokinase 2 is the predominant hexokinase isozyme expressed in insulin-responsive tissues such as skeletal muscle. Expression of this gene is insulin-responsive, and studies in rat suggest that it is involved in the increased rate of glycolysis seen in rapidly growing cancer cells.
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Protein Aliases: DKFZp686M1669; Hexokinase; Hexokinase type II; Hexokinase-2; hexokinase-2 muscle; hexokinase-2, muscle; Hexokinase-B; HK II; Muscle form hexokinase; OTTHUMP00000202738
Gene Aliases: AI642394; HK2; HKII; HXK2
Molecular Function: kinase