Required for efficient primary cilium formation. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Belongs to the WD repeat WDR90/POC16 family. Intron retention. Unlikely isoform. Aberrant splicing. Truncated N-terminus. Probable cloning artifact. Probable cloning artifact. Truncated C-terminus.