1O0P

Solution Structure of the third RNA Recognition Motif (RRM) of U2AF65 in complex with an N-terminal SF1 peptide


Domain Annotation: SCOP Classification SCOP Database (version: 2.0) Homepage

ChainDomainClassArchitectureTopologyHomology
3.30.70.330 Alpha Beta 2-Layer Sandwich Alpha-Beta Plaits RRM (RNA recognition motif) domain

Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
PF00076RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain) (RRM_1)RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain)The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The mo ...The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins (Swiss:P05455) have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteristic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins (Swiss:P05455) are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.
Domain
PF16275Splicing factor 1 helix-hairpin domain (SF1-HH)Splicing factor 1 helix-hairpin domainThis domain, approximately 100 residues in length, is mainly found in splicing factor 1 from yeast to human [1]. It is a helix-hairpin domain, which forms a secondary, hydrophobic interface with U2AF65(UHM) to lock the orientation of the two subunit ...This domain, approximately 100 residues in length, is mainly found in splicing factor 1 from yeast to human [1]. It is a helix-hairpin domain, which forms a secondary, hydrophobic interface with U2AF65(UHM) to lock the orientation of the two subunits, which is essential for cooperative formation of the ternary SF1-U2AF65-RNA complex [2]. In this domain, it contains a highly conserved SPSP motif in its C terminal and phophorylation of SPSP motif induces a disorder-to-order transition within a novel SF1/U2AF65 interface, indicating a phosphorylation-dependent control of pre-mRNA splicing factors [3].
Domain
PF00098Zinc knuckle (zf-CCHC)Zinc knuckleThe zinc knuckle is a zinc binding motif composed of the the following CX2CX4HX4C where X can be any amino acid. The motifs are mostly from retroviral gag proteins (nucleocapsid). Prototype structure is from HIV. Also contains members involved in eu ...The zinc knuckle is a zinc binding motif composed of the the following CX2CX4HX4C where X can be any amino acid. The motifs are mostly from retroviral gag proteins (nucleocapsid). Prototype structure is from HIV. Also contains members involved in eukaryotic gene regulation, such as C. elegans GLH-1. Structure is an 18-residue zinc finger.
Domain
PF00013KH domain (KH_1)KH domainKH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.Domain

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Splicing factor U2AF 65 kDa subunit
    Splicing Factor SF1