Annotations: 2R5Y

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth A]	d2r5ya1	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Homeodomain	automated matches	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
C [auth A]	d2r5ya2	Artifacts	Tags	Tags	Tags	N-terminal Tags	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
D [auth B]	d2r5yb_	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Homeodomain	automated matches	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)
D [auth B]	SCOP2 Family	Homeodomain	8002407	4000291	SCOP2 (2022-06-29)
D [auth B]	SCOP2 Superfamily	Homeodomain-like	8057620	3000001	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)
C [auth A]	PF00046	e2r5yA2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: PF00046	ECOD (1.6)
D [auth B]	PF05920	e2r5yB2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: PF05920	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth A]	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)
D [auth B]	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
D [auth B]	PF05920	Homeobox KN domain (Homeobox_KN)	Homeobox KN domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C]	DNA (5'-D(DAPDCPDTPDCPDTPDAPDTPDGPDAPDTPDTPDTPDAPDTPDGPDGPDGPDCPDTPDG)-3')	-	-	-
B [auth D]	DNA (5'-D(DTPDCPDAPDGPDCPDCPDCPDAPDTPDAPDAPDAPDTPDCPDAPDTPDAPDGPDAPDG)-3')	-	-	-
C [auth A]	Homeotic protein Sex combs reduced	DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity identical protein binding protein binding binding protein homodimerization activity protein dimerization activity DNA binding sequence-specific DNA binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity identical protein binding protein binding binding protein homodimerization activity protein dimerization activity DNA binding sequence-specific DNA binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding organic cyclic compound binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding	developmental process multicellular organism development multicellular organismal process digestive system development tube development midgut development anatomical structure development digestive tract development system development animal organ development gland development pattern specification process salivary gland development formation of anatomical boundary developmental process multicellular organism development multicellular organismal process digestive system development tube development midgut development anatomical structure development digestive tract development system development animal organ development gland development pattern specification process salivary gland development formation of anatomical boundary salivary gland boundary specification regionalization anatomical structure morphogenesis anatomical structure formation involved in morphogenesis formation of animal organ boundary animal organ formation animal organ morphogenesis exocrine system development sensory organ development sex comb development regulation of cellular process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II regulation of biological process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of DNA-templated transcription cellular biosynthetic process positive regulation of biological process RNA metabolic process positive regulation of cellular metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process positive regulation of biosynthetic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process positive regulation of RNA biosynthetic process cellular process positive regulation of cellular biosynthetic process anterior/posterior pattern specification	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen
D [auth B]	Homeobox protein extradenticle	transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding organic cyclic compound binding transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding organic cyclic compound binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding protein heterodimerization activity protein binding protein dimerization activity transcription coactivator activity DNA-binding transcription factor activity transcription factor binding DNA-binding transcription factor activity, RNA polymerase II-specific DNA-binding transcription factor binding	developmental process multicellular organism development multicellular organismal process head development central nervous system development anatomical structure development animal organ development brain development nervous system development system development anatomical structure morphogenesis animal organ morphogenesis gland development pattern specification process developmental process multicellular organism development multicellular organismal process head development central nervous system development anatomical structure development animal organ development brain development nervous system development system development anatomical structure morphogenesis animal organ morphogenesis gland development pattern specification process salivary gland development formation of anatomical boundary salivary gland boundary specification regionalization anatomical structure formation involved in morphogenesis formation of animal organ boundary animal organ formation exocrine system development muscle structure development somatic muscle development regulation of biological process regulation of cellular process regulation of developmental process cellular developmental process regulation of cell fate commitment biological regulation cell fate specification regulation of cell fate specification cell differentiation cellular process cell fate commitment embryonic organ development embryo development peripheral nervous system development positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of DNA-templated transcription cellular biosynthetic process positive regulation of biological process RNA metabolic process positive regulation of cellular metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process positive regulation of biosynthetic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process oenocyte development oenocyte differentiation cell development sensory organ development eye development visual system development sensory system development transcription by RNA polymerase II regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II generation of neurons neurogenesis neuron differentiation neuron development	RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle organelle cytoplasm protein-DNA complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A]	IPR001356	Homeobox domain	Domain
C [auth A]	IPR001827	Homeobox protein, antennapedia type, conserved site	Conserved Site
C [auth A]	IPR017995	Homeobox protein, antennapedia type	Family
C [auth A]	IPR009057	Homeobox-like domain superfamily	Homologous Superfamily
C [auth A]	IPR017970	Homeobox, conserved site	Conserved Site
C [auth A]	IPR020479	Homeobox domain, metazoa	Domain
D [auth B]	IPR001356	Homeobox domain	Domain
D [auth B]	IPR009057	Homeobox-like domain superfamily	Homologous Superfamily
D [auth B]	IPR017970	Homeobox, conserved site	Conserved Site
D [auth B]	IPR005542	PBX, PBC domain	Domain
D [auth B]	IPR008422	Homeobox KN domain	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.