The OCtamer REpeat (OCRE) has been annotated as a 42-residue sequence motif with 12 tyrosine residues in the spliceosome trans-regulatory elements RBM5 and RBM10 (RBM [RNA-binding motif]), which are known to regulate alternative splicing of Fas and Bcl-x pre-mRNA transcripts [1]. The structure of the domain consists of an anti-parallel arrangement of six beta strands.

1: Nuclear Magnetic Resonance Structure of a Novel Globular Domain in RBM10 Containing OCRE, the Octamer Repeat Sequence Motif. Martin BT, Serrano P, Geralt M, Wuthrich K; Structure. 2016;24:158-164. PMID:26712279

2: Structural basis for the recognition of spliceosomal SmN/B/B' proteins by the RBM5 OCRE domain in splicing regulation. Mourao A, Bonnal S, Soni K, Warner L, Bordonne R, Valcarcel J, Sattler M; Elife. 2016; [Epub ahead of print] PMID:27894420