class of enzymes

A hexokinase is an enzyme that phosphorylates (adds phosphyryl groups) hexoses (six-carbon sugars). It takes in a substrate (usually glucose in most organisms) and adds a phosphate (usually from ATP) to form hexose phosphate as the product. When the substrate is glucose, the product is glucose-6-phosphate.

A picture of hexokinase 1 from the yeast Kluyveromyces lactis[1].


  1. PDB: 3O08​; Kuettner EB, Kettner K, Keim A, Svergun DI, Volke D (2010). "Crystal structure of dimeric KlHxk1 in crystal form I". doi:10.2210/pdb3o08/pdb. Cite journal requires |journal= (help)