This entry represents the beta-barrel domain found at the N-terminal of intron-binding protein aquarius, a splicing factor which links excision of introns from pre-mRNA with snoRP assembly [1,2].

1: A spliceosomal intron binding protein, IBP160, links position-dependent assembly of intron-encoded box C/D snoRNP to pre-mRNA splicing. Hirose T, Ideue T, Nagai M, Hagiwara M, Shu MD, Steitz JA; Mol Cell. 2006;23:673-684. PMID:16949364

2: The RNA helicase Aquarius exhibits structural adaptations mediating its recruitment to spliceosomes. De I, Bessonov S, Hofele R, dos Santos K, Will CL, Urlaub H, Luhrmann R, Pena V; Nat Struct Mol Biol. 2015;22:138-144. PMID:25599396