Enables ketohexokinase activity. Involved in several processes, including response to hexose; response to insulin; and response to sucrose. Predicted to be located in nucleus. Predicted to be active in cytoplasm. Human ortholog(s) of this gene implicated in essential fructosuria. Orthologous to human KHK (ketohexokinase). [provided by Alliance of Genome Resources, Apr 2022]