Chromatin-remodeling protein that has a role in notch signaling-dependent vulval cell fate determination. May also have a role in pharyngeal precursor cell specification. ATP + H2O = ADP + H(+) + phosphate Expressed in the head and vulva. Detected around the 20 cell stage after the onset of zygotic transcription. Also expressed in adults. Belongs to the SNF2/RAD54 helicase family.