Catalyzes the phosphorylation of various hexoses, such as D-glucose, D-glucosamine, D-fructose, D-mannose and 2-deoxy-D-glucose, to hexose 6-phosphate (D-glucose 6-phosphate, D-glucosamine 6-phosphate, D-fructose 6-phosphate, D-mannose 6-phosphate and 2-deoxy-D-glucose 6-phosphate, respectively) (PubMed:1637300, PubMed:25316723, PubMed:27374331). Does not phosphorylate N-acetyl-D-glucosamine (PubMed:27374331). Mediates the initial step of glycolysis by catalyzing phosphorylation of D-glucose to D-glucose 6-phosphate (By similarity). Involved in innate immunity and inflammation by acting as a pattern recognition receptor for bacterial peptidoglycan (PubMed:27374331). When released in the cytosol, N-acetyl-D-glucosamine component of bacterial peptidoglycan inhibits the hexokinase activity of HK1 and causes its dissociation from mitochondrial outer membrane, thereby activating the NLRP3 inflammasome (PubMed:27374331). ATP + D-hexose = ADP + D-hexose 6-phosphate + H(+) ATP + D-fructose = ADP + D-fructose 6-phosphate + H(+) ATP + D-glucose = ADP + D-glucose 6-phosphate + H(+) ATP + D-mannose = ADP + D-mannose 6-phosphate + H(+) ATP + D-glucosamine = ADP + D-glucosamine 6-phosphate + H(+) Hexokinase is an allosteric enzyme inhibited by its product D-glucose 6-phosphate (PubMed:1637300). Hexokinase activity is inhibited by N-acetyl-D-glucosamine (PubMed:27374331). Carbohydrate metabolism; hexose metabolism. Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate and glycerone phosphate from D-glucose: step 1/4. Monomer (PubMed:10686099). Interacts with RABL2/RABL2A; binds preferentially to GTP-bound RABL2 (By similarity). Interacts with VDAC1 (PubMed:22304920). The HK1-VDAC1 complex interacts with ATF2 (PubMed:22304920). Interacts (via N-terminal spermatogenic cell-specific region) with PFKM (via C-terminus) (By similarity). The mitochondrial-binding peptide (MBP) region promotes association with the mitochondrial outer membrane (Probable). Dissociates from the mitochondrial outer membrane following inhibition by N-acetyl-D-glucosamine, leading to relocation to the cytosol (PubMed:27374331). Isoform 2: Erythrocyte specific (Ref.6). Isoform 3: Testis-specific (PubMed:10978502). Isoform 4: Testis-specific (PubMed:10978502). The N- and C-terminal halves of this hexokinase contain a hexokinase domain (PubMed:9493266, PubMed:9735292, PubMed:10574795). The catalytic activity is associated with the C-terminus while regulatory function is associated with the N-terminus (PubMed:9493266, PubMed:9735292, PubMed:10574795). Each domain can bind a single D-glucose and D-glucose 6-phosphate molecule (PubMed:9493266). The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. Belongs to the hexokinase family. Hexokinase is known to act as a monomer (PubMed:10686099). It however homodimerizes at elevated protein concentrations used for crystallizations (PubMed:9493266, PubMed:10574795). Hexokinase entry