An anciently diverged family of RNA binding proteins maintain correct splicing of a class of ultra-long exons through cryptic splice site repression.

Previously, we showed that the germ cell-specific nuclear protein RBMXL2 represses cryptic splicing patterns during meiosis and is required for male fertility (Ehrmann et al., 2019). Here, we show that in somatic cells the similar yet ubiquitously expressed RBMX protein has similar functions. RBMX regulates a distinct class of exons that exceed the median human exon size. RBMX protein-RNA interactions are enriched within ultra-long exons, particularly within genes involved in genome stability, and repress the selection of cryptic splice sites that would compromise gene function. The

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© 2023, Siachisumo, Luzzi, Aldalaqan et al.

Déclaration de conflit d'intérêts

CS, SL, SA, GH, CD, KC, MG, IY, KJ, MK, IE, GS, SC, JM, SW, YB, DE No competing interests declared