Annotations: 1B7F

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth A]	d1b7fa1	Alpha and beta proteins (a+b)	Ferredoxin-like	RNA-binding domain, RBD, aka RNA recognition motif (RRM)	Canonical RBD	Sex-lethal protein	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
D [auth B]	d1b7fb1	Alpha and beta proteins (a+b)	Ferredoxin-like	RNA-binding domain, RBD, aka RNA recognition motif (RRM)	Canonical RBD	Sex-lethal protein	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth A]	SCOP2 Family	Canonical RBD	8022953	4000236	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Family	Canonical RBD	8022954	4000236	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Superfamily	RNA-binding domain, RBD	8035333	3000110	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Superfamily	RNA-binding domain, RBD	8035334	3000110	SCOP2 (2022-06-29)
D [auth B]	SCOP2B Superfamily	RNA-binding domain, RBD	8035333	3000110	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	RNA-binding domain, RBD	8035334	3000110	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)
C [auth A]	RRM_1_2	e1b7fA1	A: a+b two layers	X: Alpha-beta plaits	H: RNA-binding domain, RBD (From Topology)	T: RNA-binding domain, RBD	F: RRM_1_2	ECOD (1.6)
D [auth B]	RRM_1_2	e1b7fB1	A: a+b two layers	X: Alpha-beta plaits	H: RNA-binding domain, RBD (From Topology)	T: RNA-binding domain, RBD	F: RRM_1_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth A]	3.30.70.330	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	RRM (RNA recognition motif) domain	CATH (4.3.0)
D [auth B]	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
C [auth A], D [auth B]	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 [auth P], B [auth Q]	RNA (5'-R(PGPUPUPGPUPUPUPUPUPUPUPU)-3')	-	-	-
C [auth A], D [auth B]	PROTEIN (SXL-LETHAL PROTEIN)	pre-mRNA binding RNA binding binding nucleic acid binding mRNA 3'-UTR binding mRNA binding translation regulator activity mRNA regulatory element binding translation repressor activity translation repressor activity poly-pyrimidine tract binding single-stranded RNA binding poly(A) binding poly-purine tract binding mRNA 5'-UTR binding pre-mRNA binding RNA binding binding nucleic acid binding mRNA 3'-UTR binding mRNA binding translation regulator activity mRNA regulatory element binding translation repressor activity translation repressor activity poly-pyrimidine tract binding single-stranded RNA binding poly(A) binding poly-purine tract binding mRNA 5'-UTR binding poly(U) RNA binding	regulation of cellular process negative regulation of biological process regulation of mRNA splicing, via spliceosome mRNA processing regulation of primary metabolic process nucleobase-containing compound metabolic process regulation of RNA metabolic process negative regulation of mRNA splicing, via spliceosome negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process RNA processing negative regulation of mRNA processing regulation of biological process negative regulation of metabolic process regulation of cellular process negative regulation of biological process regulation of mRNA splicing, via spliceosome mRNA processing regulation of primary metabolic process nucleobase-containing compound metabolic process regulation of RNA metabolic process negative regulation of mRNA splicing, via spliceosome negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process RNA processing negative regulation of mRNA processing regulation of biological process negative regulation of metabolic process primary metabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of metabolic process negative regulation of RNA metabolic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process negative regulation of mRNA metabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of mRNA processing RNA splicing biological regulation regulation of macromolecule metabolic process gene expression nucleobase-containing compound biosynthetic process regulation of RNA splicing mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process negative regulation of RNA splicing RNA splicing, via transesterification reactions negative regulation of biosynthetic process mRNA splicing, via spliceosome cellular process RNA splicing, via transesterification reactions with bulged adenosine as nucleophile regulation of mRNA metabolic process developmental process tissue regeneration epithelium development developmental growth anatomical structure development growth tissue development regeneration epithelium regeneration post-transcriptional regulation of gene expression negative regulation of translation protein metabolic process negative regulation of protein metabolic process regulation of protein metabolic process translation regulation of translation regulation of protein stability regulation of biological quality protein stabilization sexual reproduction cellular developmental process reproductive process oogenesis multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental process involved in reproduction female gamete generation gamete generation cell differentiation germ cell development homologous recombination meiotic cell cycle process cellular component organization meiosis I meiotic nuclear division cell cycle cellular component organization or biogenesis reciprocal homologous recombination cell cycle process DNA recombination meiotic cell cycle organelle fission DNA metabolic process reciprocal meiotic recombination nuclear division organelle organization meiosis I cell cycle process alternative mRNA splicing, via spliceosome regulation of alternative mRNA splicing, via spliceosome cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction cell communication positive regulation of response to stimulus positive regulation of smoothened signaling pathway signal transduction positive regulation of cellular process regulation of smoothened signaling pathway regulation of signaling cell surface receptor signaling pathway smoothened signaling pathway regulation of response to stimulus regulation of cell communication positive regulation of signaling sex determination multicellular organism development multicellular organismal process female sex determination cell surface receptor signaling pathway via STAT negative regulation of signaling negative regulation of cell communication regulation of receptor signaling pathway via JAK-STAT negative regulation of receptor signaling pathway via JAK-STAT negative regulation of response to stimulus negative regulation of signal transduction negative regulation of receptor signaling pathway via STAT regulation of receptor signaling pathway via STAT cell surface receptor signaling pathway via JAK-STAT positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of gene expression positive regulation of RNA splicing regulation of localization negative regulation of RNA export from nucleus cellular localization negative regulation of nucleocytoplasmic transport nitrogen compound transport nucleocytoplasmic transport transport nuclear transport negative regulation of transport localization establishment of localization in cell RNA localization nuclear export nucleobase-containing compound transport regulation of intracellular transport negative regulation of intracellular transport RNA transport regulation of transport negative regulation of nucleobase-containing compound transport regulation of nucleobase-containing compound transport regulation of RNA export from nucleus nucleic acid transport intracellular transport regulation of nucleocytoplasmic transport establishment of localization RNA export from nucleus establishment of RNA localization regulation of cellular localization macromolecule localization sex-chromosome dosage compensation epigenetic regulation of gene expression chromatin organization chromatin remodeling somatic sex determination imaginal disc growth imaginal disc development animal organ development primary sex determination germ-line sex determination primary sex determination, germ-line female germ-line sex determination sex differentiation germarium-derived cystoblast division germ-line cyst formation germarium-derived female germ-line cyst formation cystoblast division female germ-line cyst formation cell population proliferation germarium-derived egg chamber formation asymmetric cell division anatomical structure morphogenesis anatomical structure formation involved in morphogenesis cell division oocyte differentiation translational initiation regulation of translational initiation negative regulation of translational initiation stem cell division regulation of stem cell division regulation of cell division primary sex determination, soma sex determination, primary response to X:A ratio	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex ribonucleoprotein complex membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A], D [auth B]	IPR050502	Eukaryotic RNA-binding	Family
C [auth A], D [auth B]	IPR006546	Sex-lethal splicing factor	Family
C [auth A], D [auth B]	IPR000504	RNA recognition motif domain	Domain
C [auth A], D [auth B]	IPR012677	Nucleotide-binding alpha-beta plait domain superfamily	Homologous Superfamily
C [auth A], D [auth B]	IPR002343	Paraneoplastic encephalomyelitis antigen	Family
C [auth A], D [auth B]	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.