Predicted to enable identical protein binding activity and thiamine diphosphokinase activity. Predicted to be involved in thiamine diphosphate biosynthetic process. Predicted to act upstream of or within thiamine metabolic process. Human ortholog(s) of this gene implicated in inherited metabolic disorder. Orthologous to human TPK1 (thiamin pyrophosphokinase 1). [provided by Alliance of Genome Resources, Apr 2022]