UniProt functional annotation for O60306



	UniProt functional annotation for O60306

UniProt code: O60306.

Organism: Homo sapiens (Human).

Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.

Function: 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). {ECO:0000269|PubMed:11991638, ECO:0000269|PubMed:16949364, ECO:0000269|PubMed:25599396, ECO:0000269|PubMed:28076346, ECO:0000269|PubMed:28502770}.

Catalytic activity: Reaction=ATP + H2O = ADP + H(+) + phosphate; Xref=Rhea:RHEA:13065, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474, ChEBI:CHEBI:456216; EC=3.6.4.13; Evidence={ECO:0000269|PubMed:25599396};

Subunit: Identified in the spliceosome C complex (PubMed:11991638, PubMed:16949364, PubMed:25599396, PubMed:28502770, PubMed:28076346). Component of the XAB2 complex, a multimeric protein complex composed of XAB2, PRPF19, AQR, ZNF830, ISY1, and PPIE (PubMed:17981804). Identified in a pentameric intron-binding (IB) complex composed of AQR, XAB2, ISY1, ZNF830 and PPIE that is incorporated into the spliceosome as a preassembled complex (PubMed:25599396). The IB complex does not contain PRPF19 (PubMed:25599396). Within the spliceosome, interacts with SNRPA1, SF3B1, SF3B3, SF3A1 and SF3A2 (PubMed:25599396). {ECO:0000269|PubMed:11991638, ECO:0000269|PubMed:16949364, ECO:0000269|PubMed:17981804, ECO:0000269|PubMed:25599396, ECO:0000269|PubMed:28076346, ECO:0000269|PubMed:28502770}.

Subcellular location: Nucleus {ECO:0000269|PubMed:11991638, ECO:0000269|PubMed:25599396, ECO:0000269|PubMed:28076346, ECO:0000269|PubMed:28502770}. Nucleus, nucleoplasm {ECO:0000269|PubMed:16949364}. Note=Localizes to speckle-like regions of the nucleoplasm. {ECO:0000269|PubMed:16949364}.

Domain: Contains an N-terminal domain with structural similarity to ARM repeat regions; this domain functions as scaffold for protein-protein interactions, but is not required for RNA binding or for ATP-dependent RNA helicase activity. {ECO:0000269|PubMed:25599396}.

Similarity: Belongs to the CWF11 family. {ECO:0000305}.

Sequence caution: Sequence=BAA25486.3; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};

Annotations taken from UniProtKB at the EBI.


Organism:		Homo sapiens (Human).
Taxonomy:		Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.



Function:		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). {ECO:0000269\|PubMed:11991638, ECO:0000269\|PubMed:16949364, ECO:0000269\|PubMed:25599396, ECO:0000269\|PubMed:28076346, ECO:0000269\|PubMed:28502770}.


Catalytic activity:		Reaction=ATP + H2O = ADP + H(+) + phosphate; Xref=Rhea:RHEA:13065, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474, ChEBI:CHEBI:456216; EC=3.6.4.13; Evidence={ECO:0000269\|PubMed:25599396};
Subunit:		Identified in the spliceosome C complex (PubMed:11991638, PubMed:16949364, PubMed:25599396, PubMed:28502770, PubMed:28076346). Component of the XAB2 complex, a multimeric protein complex composed of XAB2, PRPF19, AQR, ZNF830, ISY1, and PPIE (PubMed:17981804). Identified in a pentameric intron-binding (IB) complex composed of AQR, XAB2, ISY1, ZNF830 and PPIE that is incorporated into the spliceosome as a preassembled complex (PubMed:25599396). The IB complex does not contain PRPF19 (PubMed:25599396). Within the spliceosome, interacts with SNRPA1, SF3B1, SF3B3, SF3A1 and SF3A2 (PubMed:25599396). {ECO:0000269\|PubMed:11991638, ECO:0000269\|PubMed:16949364, ECO:0000269\|PubMed:17981804, ECO:0000269\|PubMed:25599396, ECO:0000269\|PubMed:28076346, ECO:0000269\|PubMed:28502770}.
Subcellular location:		Nucleus {ECO:0000269\|PubMed:11991638, ECO:0000269\|PubMed:25599396, ECO:0000269\|PubMed:28076346, ECO:0000269\|PubMed:28502770}. Nucleus, nucleoplasm {ECO:0000269\|PubMed:16949364}. Note=Localizes to speckle-like regions of the nucleoplasm. {ECO:0000269\|PubMed:16949364}.
Domain:		Contains an N-terminal domain with structural similarity to ARM repeat regions; this domain functions as scaffold for protein-protein interactions, but is not required for RNA binding or for ATP-dependent RNA helicase activity. {ECO:0000269\|PubMed:25599396}.
Similarity:		Belongs to the CWF11 family. {ECO:0000305}.
Sequence caution:		Sequence=BAA25486.3; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};