Annotations: 3U1L

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3u1la2	Alpha and beta proteins (a+b)	Ferredoxin-like	RNA-binding domain, RBD, aka RNA recognition motif (RRM)	Canonical RBD	Pre-mRNA splicing factor Cwc2 / Cwf2 / Prp3, RRM domain	Baker's yeast (Saccharomyces cerevisiae S288C ) [TaxId: 559292 ],	SCOPe (2.08)
A	d3u1la1	Small proteins	CCCH zinc finger	CCCH zinc finger	Pre-mRNA splicing factor Cwc2 / Cwf2 / Prp3, zinc finger domain	Pre-mRNA splicing factor Cwc2 / Cwf2 / Prp3, zinc finger domain	Baker's yeast (Saccharomyces cerevisiae S288C ) [TaxId: 559292 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	RNA-binding domain RBD	8051796	3000110	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	CCCH zinc finger-like	8051791	3001741	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00076	e3u1lA2	A: a+b two layers	X: Alpha-beta plaits	H: RNA-binding domain, RBD (From Topology)	T: RNA-binding domain, RBD	F: PF00076	ECOD (1.6)
A	PF16131	e3u1lA1	A: few secondary structure elements	X: CCCH zinc finger	H: CCCH zinc finger (From Topology)	T: CCCH zinc finger	F: PF16131	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.70.330	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	RRM (RNA recognition motif) domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF16131	Torus domain (Torus)	Torus domain	This domain is found in pre-mRNA-splicing factor CWC2. It includes a CCCH-type zinc finger [1].	Domain
A	PF00076	RNA recognition motif (RRM_1)	RNA recognition motif	The RRM motif (a.k.a. RRM, RBD, or RNP domain) 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 pro ...	The RRM motif (a.k.a. RRM, RBD, or RNP domain) 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Pre-mRNA-splicing factor CWC2	pre-mRNA binding RNA binding binding organic cyclic compound binding nucleic acid binding U6 snRNA binding snRNA binding cation binding ion binding metal ion binding small molecule binding	regulation of biological process regulation of cellular process biological regulation positive regulation of biological process cellular process cell cycle regulation of cell cycle positive regulation of cell cycle positive regulation of cellular process cellular biosynthetic process RNA metabolic process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process cellular process cell cycle regulation of cell cycle positive regulation of cell cycle positive regulation of cellular process cellular biosynthetic process RNA metabolic process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process regulation of RNA metabolic process organic substance metabolic process positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process RNA processing regulation of nucleobase-containing compound metabolic process regulation of biosynthetic process RNA splicing positive regulation of nucleobase-containing compound metabolic process cellular metabolic process primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression regulation of RNA splicing macromolecule biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process positive regulation of gene expression metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of RNA splicing regulation of metabolic process positive regulation of cellular biosynthetic process mRNA processing mRNA metabolic process RNA splicing, via transesterification reactions mRNA cis splicing, via spliceosome mRNA splicing, via spliceosome RNA splicing, via transesterification reactions with bulged adenosine as nucleophile ribonucleoprotein complex biogenesis protein-RNA complex assembly cellular component organization cellular component biogenesis protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis protein-containing complex organization spliceosomal snRNP assembly	membrane-bounded organelle U2-type spliceosomal complex protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex U2-type catalytic step 1 spliceosome intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle spliceosomal complex organelle ribonucleoprotein complex membrane-bounded organelle U2-type spliceosomal complex protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex U2-type catalytic step 1 spliceosome intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle spliceosomal complex organelle ribonucleoprotein complex catalytic step 1 spliceosome Prp19 complex catalytic step 2 spliceosome U2-type catalytic step 2 spliceosome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR039171	Pre-mRNA-splicing factor Cwc2/Slt11	Family
A	IPR034181	Pre-mRNA-splicing factor Cwc2, RNA recognition motif	Domain
A	IPR000504	RNA recognition motif domain	Domain
A	IPR032297	Torus domain	Domain
A	IPR000571	Zinc finger, CCCH-type	Domain
A	IPR012677	Nucleotide-binding alpha-beta plait domain superfamily	Homologous Superfamily
A	IPR035979	RNA-binding domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.