Annotations: 4M4X

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PAS_1	e4m4xA1	A: a+b three layers	X: Profilin-like	H: sensor domains (From Topology)	T: sensor domains	F: PAS_1	ECOD (1.6)
B	PAS_1	e4m4xB1	A: a+b three layers	X: Profilin-like	H: sensor domains (From Topology)	T: sensor domains	F: PAS_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.450.20	Alpha Beta	2-Layer Sandwich	Beta-Lactamase	PAS domain	CATH (4.3.0)
B	3.30.450.20	Alpha Beta	2-Layer Sandwich	Beta-Lactamase	PAS domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00989	PAS fold (PAS)	PAS fold	The PAS fold corresponds to the structural domain that has previously been defined as PAS and PAC motifs [4]. The PAS fold appears in archaea, eubacteria and eukarya. This domain can bind gases (O2, CO and NO), FAD, 4-hydroxycinnamic acid and NAD+ (M ...	The PAS fold corresponds to the structural domain that has previously been defined as PAS and PAC motifs [4]. The PAS fold appears in archaea, eubacteria and eukarya. This domain can bind gases (O2, CO and NO), FAD, 4-hydroxycinnamic acid and NAD+ (Matilla et.al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Aryl hydrocarbon receptor	sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding protein binding protein-folding chaperone binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding protein binding protein-folding chaperone binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding cis-regulatory region sequence-specific DNA binding transcription regulatory region nucleic acid binding nuclear receptor activity molecular transducer activity ligand-activated transcription factor activity signaling receptor activity transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding signaling receptor binding DNA-binding transcription factor binding aryl hydrocarbon receptor binding identical protein binding Hsp90 protein binding heat shock protein binding protein heterodimerization activity protein dimerization activity protein homodimerization activity E-box binding RNA polymerase II transcription regulatory region sequence-specific DNA binding RNA polymerase II cis-regulatory region sequence-specific DNA binding	response to stimulus response to chemical response to xenobiotic stimulus developmental process heart development multicellular organismal process heart growth regulation of biological process regulation of growth regulation of multicellular organismal development regulation of developmental growth regulation of developmental process developmental growth animal organ development response to stimulus response to chemical response to xenobiotic stimulus developmental process heart development multicellular organismal process heart growth regulation of biological process regulation of growth regulation of multicellular organismal development regulation of developmental growth regulation of developmental process developmental growth animal organ development growth biological regulation organ growth circulatory system development multicellular organism development regulation of organ growth regulation of heart growth anatomical structure development regulation of multicellular organismal process system development regulation of tube diameter system process regulation of tube size regulation of system process negative regulation of biological process negative regulation of vasoconstriction circulatory system process regulation of blood circulation vascular process in circulatory system regulation of vasoconstriction blood vessel diameter maintenance regulation of biological quality negative regulation of multicellular organismal process vasoconstriction blood circulation regulation of anatomical structure size reproductive system development prostate gland development reproductive process gland development urogenital system development developmental process involved in reproduction reproductive structure development regulation of adaptive immune response immune response regulation of response to stimulus immune system process regulation of immune response regulation of immune system process adaptive immune response regulation of cellular process transcription preinitiation complex assembly positive regulation of macromolecule biosynthetic process regulation of primary metabolic process cellular component biogenesis nucleobase-containing compound metabolic process DNA-templated transcription positive regulation of metabolic process regulation of DNA-templated transcription initiation regulation of RNA metabolic process cellular component assembly transcription by RNA polymerase II positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process transcription initiation at RNA polymerase II promoter regulation of transcription by RNA polymerase II positive regulation of nucleobase-containing compound metabolic process primary metabolic process positive regulation of transcription by RNA polymerase II positive regulation of DNA-templated transcription initiation positive regulation of RNA metabolic process regulation of gene expression biosynthetic process RNA polymerase II preinitiation complex assembly metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process regulation of RNA polymerase II transcription preinitiation complex assembly regulation of cellular component organization positive regulation of cellular component organization positive regulation of DNA-templated transcription positive regulation of biological process RNA metabolic process cellular component organization protein-DNA complex organization RNA biosynthetic process nucleic acid biosynthetic process regulation of protein-containing complex assembly positive regulation of protein-containing complex assembly positive regulation of biosynthetic process protein-containing complex assembly cellular component organization or biogenesis positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process positive regulation of RNA polymerase II transcription preinitiation complex assembly protein-containing complex organization positive regulation of cellular component biogenesis positive regulation of transcription initiation by RNA polymerase II protein-DNA complex assembly regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression regulation of cellular component biogenesis macromolecule biosynthetic process DNA-templated transcription initiation nucleic acid metabolic process positive regulation of RNA biosynthetic process cellular process regulation of transcription initiation by RNA polymerase II B cell homeostasis multicellular organismal-level homeostasis leukocyte homeostasis homeostatic process homeostasis of number of cells lymphocyte homeostasis rhythmic process circadian regulation of gene expression circadian rhythm positive regulation of growth positive regulation of growth rate regulation of growth rate immune system development spleen development hematopoietic or lymphoid organ development branching morphogenesis of an epithelial tube angiogenesis tube morphogenesis epithelial tube morphogenesis blood vessel development epithelium development blood vessel morphogenesis tube development morphogenesis of an epithelium tissue development vasculature development branching involved in blood vessel morphogenesis anatomical structure morphogenesis tissue morphogenesis morphogenesis of a branching structure anatomical structure formation involved in morphogenesis morphogenesis of a branching epithelium cell morphogenesis adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process T cell mediated immunity regulation of response to biotic stimulus negative regulation of response to biotic stimulus immune response to tumor cell negative regulation of immune response to tumor cell negative regulation of response to tumor cell negative regulation of lymphocyte mediated immunity regulation of response to tumor cell response to biotic stimulus T cell mediated immune response to tumor cell negative regulation of T cell mediated immune response to tumor cell regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of T cell mediated immune response to tumor cell leukocyte mediated immunity regulation of T cell mediated immunity response to tumor cell negative regulation of response to stimulus negative regulation of immune response negative regulation of immune effector process regulation of immune response to tumor cell negative regulation of adaptive immune response immune effector process negative regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of leukocyte mediated immunity regulation of lymphocyte mediated immunity negative regulation of immune system process negative regulation of leukocyte mediated immunity negative regulation of T cell mediated immunity negative regulation of RNA biosynthetic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of RNA metabolic process hepaticobiliary system development liver development cellular response to stimulus cellular response to organic cyclic compound cellular response to chemical stimulus response to polycyclic arene cellular response to 3-methylcholanthrene response to 3-methylcholanthrene cellular response to polycyclic arene response to organic cyclic compound cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B cell differentiation cell differentiation leukocyte differentiation response to 2,3,7,8-tetrachlorodibenzodioxine cellular response to 2,3,7,8-tetrachlorodibenzodioxine sensory organ development eye development visual system development camera-type eye development sensory system development T cell homeostasis heart morphogenesis cardiac chamber development animal organ morphogenesis cardiac chamber morphogenesis circumferential growth involved in left ventricle morphogenesis developmental growth involved in morphogenesis cardiac ventricle morphogenesis cardiac left ventricle morphogenesis cardiac ventricle development growth involved in heart morphogenesis cellular response to xenobiotic stimulus xenobiotic metabolic process blood vessel remodeling tissue remodeling post-embryonic development post-embryonic hemopoiesis renal system development glomerulus development glomerulus morphogenesis nephron development kidney development regulation of systemic arterial blood pressure regulation of blood pressure negative regulation of systemic arterial blood pressure negative regulation of blood pressure B-1 B cell homeostasis positive regulation of cell size regulation of cellular component size regulation of cell size kidney morphogenesis	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex transcription regulator complex membrane-bounded organelle aryl hydrocarbon receptor complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle receptor complex nuclear aryl hydrocarbon receptor complex intracellular organelle cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex transcription regulator complex membrane-bounded organelle aryl hydrocarbon receptor complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle receptor complex nuclear aryl hydrocarbon receptor complex intracellular organelle organelle intracellular protein-containing complex cytosolic aryl hydrocarbon receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR013655	PAS fold-3	Domain
A, B	IPR039091	Aryl hydrocarbon receptor/Aryl hydrocarbon receptor repressor	Family
A, B	IPR035965	PAS domain superfamily	Homologous Superfamily
A, B	IPR001610	PAC motif	Repeat
A, B	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR033348	Aryl hydrocarbon receptor, basic helix-loop-helix domain	Domain
A, B	IPR013767	PAS fold	Domain
A, B	IPR000014	PAS domain	Domain
A, B	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain

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.