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WD repeat-containing protein 74 WDR74 (WD repeat-containing protein 74) from mammals and plants is an essential factor for ribosome assembly. In cooperation with the assembly factor NVL2, WDR74 participates in an early cleavage of the pre-rRNA processing pathway. NVL2 is a type II double ring, AAA-ATPase, that may mediate the release of WDR74 from nucleolar pre-60S particles. WDR74 has been implicated in tumorigenesis. In lung cancer, it regulates cell proliferation, cell cycle progression, chemoresistance and cell aggressiveness, by inducing nuclear beta-catenin accumulation and driving downstream Wnt-responsive genes expression. In melanoma, it promotes apoptosis resistance and aggressive behavior by regulating the RPL5-MDM2-p53 pathway. WDR74 contains an N-terminal seven-bladed beta-propeller WD40 domain that associates with the D1-AAA domain of the AAA-ATPase NVL2, and a flexible lysine-rich C-terminus that extends outward from the WD40 domain, and is required for nucleolar localization. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",