Enables mediator complex binding activity and promoter-specific chromatin binding activity. Involved in cohesin loading; positive regulation of neuron migration; and regulation of transcription by RNA polymerase II. Acts upstream of or within several processes, including embryonic viscerocranium morphogenesis; fat cell differentiation; and positive regulation of ossification. Located in chromatin and nucleus. Part of integrator complex. Is expressed in several structures, including genitourinary system; integumental system; limb; nervous system; and nose. Used to study Cornelia de Lange syndrome. Human ortholog(s) of this gene implicated in Cornelia de Lange syndrome 1. Orthologous to human NIPBL (NIPBL cohesin loading factor). [provided by Alliance of Genome Resources, Apr 2022]