Annotations: 4XID

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Homeodomain-like	8057618	3000001	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Homeodomain-like	8057618	3000001	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	Homeobox	e4xidA1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: Homeobox	ECOD (1.6)
D	Homeobox	e4xidD1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: Homeobox	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)
D	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D	Homeotic protein antennapedia	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 DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator 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 DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity	developmental process multicellular organismal process head development blastoderm segmentation embryonic pattern specification segmentation pattern specification process embryo development specification of segmental identity, head regionalization head segmentation multicellular organism development anterior head development anatomical structure development developmental process multicellular organismal process head development blastoderm segmentation embryonic pattern specification segmentation pattern specification process embryo development specification of segmental identity, head regionalization head segmentation multicellular organism development anterior head development anatomical structure development specification of segmental identity, antennal segment anterior head segmentation segment specification heart development animal organ development circulatory system development system development digestive system development tube development midgut development digestive tract development regulation of multicellular organismal development regulation of biological process regulation of cellular process regulation of developmental process cellular developmental process biological regulation cell development regulation of neurogenesis regulation of cell differentiation nervous system development regulation of cell development regulation of nervous system development neurogenesis cell differentiation regulation of multicellular organismal process cellular process specification of segmental identity, thorax specification of segmental identity, trunk trunk segmentation immune system development gland development hematopoietic or lymphoid organ development immune system process lymph gland development neuroblast differentiation generation of neurons neuroblast development anterior/posterior axis specification anterior/posterior pattern specification axis specification muscle cell fate specification muscle cell fate commitment cell fate specification muscle cell differentiation muscle structure development cell fate commitment central nervous system development ventral cord development cellular biosynthetic process negative regulation of biological process RNA metabolic process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of cellular metabolic process 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 cellular process positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
B, E	DNA (5'-D(APGPAPAPAPGPCPCPAPTPTPAPGPAP*G)-3')	-	-	-
C, F	DNA (5'-D(TPCPTPCPTPAPAPTPGPGPCPTPTPTP*C)-3')	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D	IPR001827	Homeobox protein, antennapedia type, conserved site	Conserved Site
A, D	IPR017995	Homeobox protein, antennapedia type	Family
A, D	IPR017970	Homeobox, conserved site	Conserved Site
A, D	IPR009057	Homedomain-like superfamily	Homologous Superfamily
A, D	IPR020479	Homeodomain, metazoa	Domain
A, D	IPR001356	Homeodomain	Domain
A, D	IPR050296	Antennapedia-type homeobox	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 R01GM133198.