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Ribosome anti-association factor IF6 binds the large ribosomal subunit and prevents the two subunits from associating during translation initiation. IF6 comprises a family of translation factors that includes both eukaryotic (eIF6) and archeal (aIF6) members. All members of this family have a conserved pentameric fold referred to as a beta/alpha propeller. The eukaryotic IF6 members have a moderately conserved C-terminal extension which is not required for ribosomal binding, and may have an alternative function.
Jiyao W et al.(2023). "The conserved domain database in 2023.",