Involved in negative regulation of transcription by RNA polymerase II. Located in nucleus. Human ortholog(s) of this gene implicated in Bardet-Biedl syndrome 20; retinitis pigmentosa 71; and short-rib thoracic dysplasia 10 with or without polydactyly. Orthologous to human IFT172 (intraflagellar transport 172). [provided by Alliance of Genome Resources, Apr 2022]