Component of the nexin-dynein regulatory complex (N-DRC) a key regulator of ciliary/flagellar motility which maintains the alignment and integrity of the distal axoneme and regulates microtubule sliding in motile axonemes. Component of the nexin-dynein regulatory complex (N-DRC). Interacts with TCTE1/DRC5 (By similarity). Interacts with DRC7 (By similarity). Belongs to the DRC3 family.