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. Binds calmodulin when cellular Ca(2+) levels are low and thereby contributes to the regulation of calcium and calmodulin-dependent protein kinase IV (CAMK4) activity; contributes to the regulation of CAMK4 signaling cascades. Required for normal axoneme assembly in sperm flagella, normal sperm tail formation and for male fertility. {ECO:0000250|UniProtKB:A3KQH2, ECO:0000250|UniProtKB:A8HQ54, ECO:0000250|UniProtKB:Q80W32}. This is the function of Ensembl gene identifier ENSG00000114473 (DRC9, dynein regulatory complex subunit 9).