Predicted to enable transcription coregulator activity. Acts upstream of or within positive regulation of gluconeogenesis and positive regulation of transcription by RNA polymerase II. Predicted to be part of SAGA complex. Is expressed in foregut-midgut junction; hindgut; midgut; rectum; and stomach. Orthologous to several human genes including SUPT20H (SPT20 homolog, SAGA complex component). [provided by Alliance of Genome Resources, Apr 2022]