Participates in the assembly of the telomerase holoenzyme and effecting of telomerase activity via its interaction with TERT (PubMed:22226966). Involved in both early and late stages of the pre-rRNA processing pathways (PubMed:26166824). Spatiotemporally regulates 60S ribosomal subunit biogenesis in the nucleolus (PubMed:15469983, PubMed:16782053, PubMed:29107693, PubMed:26456651). Catalyzes the release of specific assembly factors, such as WDR74, from pre-60S ribosomal particles through the ATPase activity (PubMed:29107693, PubMed:26456651, PubMed:28416111). Interacts with NCL/nucleolin (PubMed:21474449). Isoform 1 and isoform 2 interact with TERT and isoform 1 exhibits a higher binding affinity for TERT compared to isoform 2 (PubMed:22226966). Isoform 1 interacts with MTREX in an ATP-dependent manner; the interaction is required to associate NVL with nuclear RNA exosome (PubMed:26166824, PubMed:31358741, PubMed:16782053). Isoform 1 interacts with RPL5 in an ATP-dependent manner (PubMed:15469983). Interacts with WDR74 (through WDR repeats); the interaction is independent of RNA or pre-60S ribosome particles (PubMed:28416111). Expressed predominantly in the nucleolus. Associates with pre-ribosomal particles in the nucleus. Widely expressed. Highest level of expression in heart, placenta, skeletal muscle, pancreas and retina. Belongs to the AAA ATPase family.