Annotations: 1X4C

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1x4ca1	Alpha and beta proteins (a+b)	Ferredoxin-like	RNA-binding domain, RBD, aka RNA recognition motif (RRM)	Canonical RBD	Splicing factor, arginine/serine-rich 1, SFRS1	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d1x4ca3	Artifacts	Tags	Tags	Tags	C-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d1x4ca2	Artifacts	Tags	Tags	Tags	N-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Canonical RBD	8021218	4000236	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	RNA-binding domain, RBD	8033598	3000110	SCOP2 (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	RRM_1_1	e1x4cA1	A: a+b two layers	X: Alpha-beta plaits	H: RNA-binding domain, RBD (From Topology)	T: RNA-binding domain, RBD	F: RRM_1_1	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	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	Splicing factor, arginine/serine-rich 1	protein binding binding protein kinase B binding kinase binding enzyme binding protein kinase binding RNA binding organic cyclic compound binding nucleic acid binding mRNA binding RS domain binding protein domain specific binding	response to peptide response to stimulus response to chemical cellular response to interleukin-17 response to interleukin-17 response to cytokine cellular response to cytokine stimulus RNA transport nitrogen compound transport transport nucleic acid transport mRNA transport establishment of localization localization response to peptide response to stimulus response to chemical cellular response to interleukin-17 response to interleukin-17 response to cytokine cellular response to cytokine stimulus RNA transport nitrogen compound transport transport nucleic acid transport mRNA transport establishment of localization localization establishment of RNA localization macromolecule localization RNA localization nucleobase-containing compound transport protein localization cellular localization protein localization to organelle cellular macromolecule localization protein localization to P-body cellular process cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway signaling biological regulation cytokine-mediated signaling pathway cell communication interleukin-17-mediated signaling pathway signal transduction negative regulation of biological process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression regulation of RNA metabolic process negative regulation of nucleobase-containing compound metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological quality RNA catabolic process mRNA stabilization mRNA catabolic process negative regulation of metabolic process primary metabolic process nucleobase-containing compound catabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of metabolic process negative regulation of RNA metabolic process catabolic process positive regulation of biological process RNA metabolic process macromolecule catabolic process negative regulation of mRNA metabolic process regulation of mRNA catabolic process positive regulation of biosynthetic process negative regulation of cellular process positive regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of catabolic process negative regulation of mRNA catabolic process negative regulation of RNA catabolic process regulation of macromolecule metabolic process regulation of catabolic process gene expression mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process regulation of mRNA stability RNA stabilization negative regulation of biosynthetic process positive regulation of gene expression regulation of RNA stability regulation of mRNA metabolic process developmental process multicellular organism development multicellular organismal process embryo development ending in birth or egg hatching chordate embryonic development anatomical structure development embryo development in utero embryonic development RNA splicing nucleobase-containing compound biosynthetic process RNA biosynthetic process nucleic acid biosynthetic process RNA processing regulation of RNA splicing positive regulation of RNA splicing ribonucleoprotein complex biogenesis mRNA processing protein-RNA complex assembly cellular component organization cellular component biogenesis spliceosomal complex assembly protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis mRNA splice site recognition protein-containing complex organization mRNA 5'-splice site recognition RNA splicing, via transesterification reactions mRNA cis splicing, via spliceosome mRNA splicing, via spliceosome RNA splicing, via transesterification reactions with bulged adenosine as nucleophile signal transduction involved in regulation of gene expression heart process system process circulatory system process cardiac muscle contraction heart contraction muscle contraction muscle system process blood circulation striated muscle contraction alternative mRNA splicing, via spliceosome protein localization to nucleus	membrane-bounded organelle intracellular organelle organelle envelope cellular anatomical structure intracellular anatomical structure organelle nuclear envelope nucleus intracellular membrane-bounded organelle endomembrane system membrane-enclosed lumen intracellular organelle lumen nuclear speck nuclear body membrane-bounded organelle intracellular organelle organelle envelope cellular anatomical structure intracellular anatomical structure organelle nuclear envelope nucleus intracellular membrane-bounded organelle endomembrane system membrane-enclosed lumen intracellular organelle lumen nuclear speck nuclear body nucleoplasm organelle lumen nuclear lumen cytoplasm protein-containing complex nuclear protein-containing complex spliceosomal complex ribonucleoprotein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR050374	RRT5/SRSF/Splicing Factor SR	Family
A	IPR034520	SRSF1, RNA recognition motif 1	Domain
A	IPR029538	Serine/arginine-rich splicing factor 1, RNA recognition motif 2	Domain
A	IPR000504	RNA recognition motif domain	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 R01GM157729.