Annotations: 1AKH

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth A]	d1akha_	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Homeodomain	Mating type protein A1 Homeodomain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
D [auth B]	d1akhb_	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Homeodomain	mat alpha2 Homeodomain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth A]	SCOP2B Superfamily	Homeodomain-like	8057604	3000001	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Homeodomain-like	8057609	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)
C [auth A]	PF00046	e1akhA1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: PF00046	ECOD (1.6)
D [auth B]	PF00046	e1akhB1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: PF00046	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
C [auth A]	PF00046	Homeodomain (Homeodomain)	Homeodomain	-	Domain
D [auth B]	PF00046	Homeodomain (Homeodomain)	Homeodomain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C]	DNA (5'-D(TPAPCPAPTPGPTPAPAPAPAPAPTPTPTPAPC PAPTPCP*A)-3')	-	-	-
B [auth D]	DNA (5'-D(TPAPTPGPAPTPGPTPAPAPAPTPTPTPTPTPA PCPAPTP*G)-3')	-	-	-
C [auth A]	PROTEIN (MATING-TYPE PROTEIN A-1)	DNA binding binding organic cyclic compound binding nucleic acid binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity	-	membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle cellular anatomical entity
D [auth B]	PROTEIN (MATING-TYPE PROTEIN ALPHA-2)	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, bending DNA-binding transcription factor activity, RNA polymerase II-specific 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, bending DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity DNA-binding transcription repressor activity, RNA polymerase II-specific DNA-binding transcription repressor activity	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic 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 organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic 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 organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation 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 regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of biological process negative regulation of cellular metabolic process negative regulation of RNA biosynthetic process negative regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process negative regulation of cellular biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of RNA metabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process negative regulation of biosynthetic process reproductive process developmental process involved in reproduction sex determination mating type determination regulation of mating-type specific transcription, DNA-templated developmental process	membrane-bounded organelle RNA polymerase II transcription repressor complex protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle organelle transcription repressor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A]	IPR001356	Homeobox domain	Domain
C [auth A]	IPR009057	Homeobox-like domain superfamily	Homologous Superfamily
C [auth A]	IPR017970	Homeobox, conserved site	Conserved Site
D [auth B]	IPR001356	Homeobox domain	Domain
D [auth B]	IPR009057	Homeobox-like 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 R01GM133198.