Component of the chromatin structure remodeling complex (RSC), which is involved in transcription regulation and nucleosome positioning. Controls particularly membrane and organelle development genes. Part of the SWI/SNF complex, an ATP-dependent chromatin remodeling complex, required for the positive and negative regulation of gene expression of a large number of genes. It changes chromatin structure by altering DNA-histone contacts within a nucleosome, leading eventually to a change in nucleosome position, thus facilitating or repressing binding of gene-specific transcription factors. 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). Component of the SWI/SNF global transcription activator complex composed of at least arp9, arp42, snf5, snf22, snf30, sbf59, sol1, ssr1, ssr2, ssr3, ssr4 and tfg3. Belongs to the SMARCD family.