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Involved in pre-mRNA splicing as component of the spliceosome (PubMed:11991638, PubMed:25599396, PubMed:28502770, PubMed:28076346). Intron-binding spliceosomal protein required to link pre-mRNA splicing and snoRNP (small nucleolar ribonucleoprotein) biogenesis (PubMed:16949364). Plays a key role in position-dependent assembly of intron-encoded box C/D small snoRNP, splicing being required for snoRNP assembly (PubMed:16949364). May act by helping the folding of the snoRNA sequence. Binds to intron of pre-mRNAs in a sequence-independent manner, contacting the region between snoRNA and the branchpoint of introns (40 nucleotides upstream of the branchpoint) during the late stages of splicing (PubMed:16949364). Has ATP-dependent RNA helicase activity and can unwind double-stranded RNA molecules with a 3' overhang (in vitro) (PubMed:25599396). [UniProt]
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Protein Aliases: aquarius homolog; functional spliceosome-associated protein 164; IBP160; intron-binding protein aquarius; Intron-binding protein of 160 kDa; RNA helicase aquarius
Gene Aliases: AQR; AW495846; fSAP164; IBP160; KIAA0560; mKIAA0560
UniProt ID: (Human) O60306, (Mouse) Q8CFQ3
Entrez Gene ID: (Human) 9716, (Mouse) 11834, (Rat) 366163
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