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 (PubMed:23427265, PubMed:25411337). Involved in the regulation of flagellar motility (PubMed:21289096). Component of the nexin-dynein regulatory complex (N-DRC), composed of at least DRC1, DRC2, DRC3, DRC4, DRC5, DRC6, DRC7, DRC8, DRC9, DRC10 and DRC11 (PubMed:25411337, PubMed:23427265). Interacts with DRC5 (PubMed:23427265). Associated with the outer doublet microtubules (OD). Phosphorylated. Belongs to the DRC7 family.