PT - JOURNAL ARTICLE AU - Anna M Rose AU - Rong Luo AU - Utsav K Radia AU - Shomi S Bhattacharya TI - Gene of the month: <em>PRPF31</em> AID - 10.1136/jclinpath-2016-203971 DP - 2017 Sep 01 TA - Journal of Clinical Pathology PG - 729--732 VI - 70 IP - 9 4099 - http://jcp.bmj.com/content/70/9/729.short 4100 - http://jcp.bmj.com/content/70/9/729.full SO - J Clin Pathol2017 Sep 01; 70 AB - Pre-mRNA splicing is an essential process in eukaryotic cells where the transcribed intronic sequences are removed, prior to translation into protein. PRPF31 is a ubiquitously expressed splicing factor, which aids in the assembly of the macromolecular spliceosome. Mutations in PRPF31 cause autosomal dominant retinitis pigmentosa (adRP), a form of retinal degeneration that causes progressive visual impairment. Interestingly, mutations in PRPF31 are non-penetrant, with some mutation carriers being phenotypically unaffected. In this review, the gene organisation, protein structure and biological function of PRPF31 are discussed, and the mechanisms of non-penetrance in PRPF31-associated adRP are discussed.