Helicase. Component of the chromatin structure remodeling complex (RSC), which is involved in transcription regulation and nucleosome positioning. Controls particularly membrane and organelle development genes. Component of the RSC complex composed of at least arp9, arp42, rsc1, rsc4, rsc7, rsc9, rsc58, sfh1, snf21, ssr1, ssr2, ssr3 and ssr4. The complex interacts with histone and histone variant components of centromeric chromatin (By similarity). Localizes to centromeric and flanking chromatin. Belongs to the SNF2/RAD54 helicase family.