This entry includes NOPCHAP1 from animals and New4 from fission yeast. NOPCHAP1 is a client-loading PAQosome/R2TP complex cofactor that selects NOP58 to promote box C/D small nucleolar ribonucleoprotein (snoRNP) assembly. The function of New4 is not clear.
Jiyao W et al.(2023). "The conserved domain database in 2023.",