May act as a co-chaperone for HSP70. May play a role in ribosomal RNA (rRNA) biogenesis, possibly in the maturation of the 60S subunit. Binds the precursor 45S rRNA. Interacts with HSPA8, PA2G4 and ZNF622. Within the nucleus, localizes primarily to the nucleolus. Contaminating sequence. Potential poly-A sequence.