Annotations: 2XSD

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C	d2xsdc2	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	automated matches	automated matches	MOUSE (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C	d2xsdc1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	automated matches	automated matches	MOUSE (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	Homeobox	e2xsdC1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: Homeobox	ECOD (1.6)
C	Pou	e2xsdC2	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: Pou	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
C	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF00157	Pou domain - N-terminal to homeobox domain (Pou)	Pou domain - N-terminal to homeobox domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	5'-D(APTPGPCPAPTPGPAPGPGP*AP)-3'	-	-	-
B	5'-D(CPCPTPCPAPTPGPCPAPTP*AP)-3'	-	-	-
C	POU DOMAIN, CLASS 3, TRANSCRIPTION FACTOR 1	DNA binding binding nucleic acid binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding	developmental process multicellular organismal process head development forebrain development animal organ development brain development nervous system development multicellular organism development central nervous system development anatomical structure development system development epithelium development epidermal cell differentiation cellular developmental process developmental process multicellular organismal process head development forebrain development animal organ development brain development nervous system development multicellular organism development central nervous system development anatomical structure development system development epithelium development epidermal cell differentiation cellular developmental process epidermis development tissue development epithelial cell differentiation skin development cell differentiation keratinocyte differentiation cellular process peripheral nervous system axon ensheathment peripheral nervous system development cell development glial cell development myelination neurogenesis Schwann cell development gliogenesis axon ensheathment ensheathment of neurons glial cell differentiation myelination in peripheral nervous system Schwann cell differentiation regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process positive regulation of DNA-templated transcription RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process positive regulation of nucleobase-containing compound metabolic process primary metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process regulation of DNA-templated transcription transcription by RNA polymerase II regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II	protein-containing complex transcription regulator complex membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR009057	Homedomain-like superfamily	Homologous Superfamily
C	IPR000327	POU-specific domain	Domain
C	IPR013847	POU domain	Domain
C	IPR050255	POU domain transcription factor	Family
C	IPR017970	Homeobox, conserved site	Conserved Site
C	IPR010982	Lambda repressor-like, DNA-binding domain superfamily	Homologous Superfamily
C	IPR001356	Homeodomain	Domain
C	IPR016362	POU-domain transcription factor, class 3	Family

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.