PRPF6 and retinitis pigmentosa 1: Pre-mRNA splicing factors may have additional roles beyond splicing in the nucleus, after a study recently found that PRPF6, PRPF8, and PRPF31 are all localized to the base of the retinal photoreceptor connecting cilium and are essential for ciliogenesis, suggesting that this form of RP is a ciliopathy (Wheway et al., 2015).