Enables several functions, including DNA-binding transcription repressor activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and chromatin binding activity. Involved in several processes, including negative regulation of ectoderm development; negative regulation of mesoderm development; and nephron epithelium morphogenesis. Acts upstream of or within several processes, including limb morphogenesis; nervous system development; and regulation of transcription by RNA polymerase II. Located in heterochromatin and nucleus. Part of NuRD complex. Is expressed in several structures, including autopod; central nervous system; embryo mesenchyme; metanephros; and sensory organ. Used to study Townes-Brocks syndrome. Human ortholog(s) of this gene implicated in Townes-Brocks syndrome and middle lobe syndrome. Orthologous to human SALL1 (spalt like transcription factor 1). [provided by Alliance of Genome Resources, Apr 2022]