H/ACA ribonucleoprotein complex subunit CBF5

UniProtKB accession:  P33322

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Catalytic subunit of H/ACA small nucleolar ribonucleoprotein (H/ACA snoRNP) complex, which catalyzes pseudouridylation of rRNA (PubMed:10523634, PubMed:9315678, PubMed:9472021, PubMed:9848653). This involves the isomerization of uridine such that the ribose is subsequently attached to C5, instead of the normal N1 (PubMed:10523634, PubMed:9315678, PubMed:9472021, PubMed:9848653). Pseudouridine ('psi') residues may serve to stabilize the conformation of rRNAs and play a central role in ribosomal RNA processing (PubMed:10523634, PubMed:9315678, PubMed:9472021, PubMed:9848653). The H/ACA snoRNP complex also mediates pseudouridylation of other types of RNAs (PubMed:21131909, PubMed:25219674). Catalyzes pseudouridylation at position 93 in U2 snRNA (PubMed:21131909). Also catalyzes pseudouridylation of mRNAs; H/ACA-type snoRNAs probably guide pseudouridylation of mRNAs (PubMed:25219674). It is a centromeric DNA-CBF3-binding factor which is involved in mitotic chromosome segregation (PubMed:8336724). Essential for cell growth (PubMed:8336724).