Enables RNA polymerase II-specific DNA-binding transcription factor binding activity; scaffold protein binding activity; and transcription coactivator activity. Involved in several processes, including cell fate commitment involved in formation of primary germ layer; gonad development; and regulation of gene expression. Located in several cellular components, including cell cortex; kinetochore; and pericentriolar material. Expressed in several structures, including ABplpapaap; ABprpapaap; Z1.aa; posterior distal tip cell; and tail hypodermis.