Binds double-stranded RNA (regardless of the sequence) and tubulin. May play a role in specific positioning of mRNAs at given sites in the cell by cross-linking cytoskeletal and RNA components, and in stimulating their translation at the site. Binds tubulin. Identified in a mRNP complex, at least composed of DHX9, DDX3X, ELAVL1, HNRNPU, IGF2BP1, ILF3, PABPC1, PCBP2, PTBP2, STAU1, STAU2, SYNCRIP and YBX1. Binds with low affinity single-stranded RNA or DNA homopolymers. Interacts with CASC3 in an RNA-dependent manner (By similarity). Localizes exclusively with the rough reticulum endoplasmic (RER). One of the DRDB could be involved in RER binding. The C-terminal contains the tubulin binding domain (TBD).