Annotations: 8BX7

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth C]	SCOP2B Superfamily	CLZ domain-like	8091636	3002529	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	CLZ domain-like	8091636	3002529	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)
E	F_UNCLASSIFIED	e8bx7E1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: F_UNCLASSIFIED	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A], C [auth B], D [auth C]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
B [auth A], C [auth B], D [auth C]	PF16526	C-terminal leucine zipper domain of cyclic nucleotide-gated channels (CLZ)	C-terminal leucine zipper domain of cyclic nucleotide-gated channels	-	Coiled-coil
B [auth A], C [auth B], D [auth C]	PF00027	Cyclic nucleotide-binding domain (cNMP_binding)	Cyclic nucleotide-binding domain	This domain sensor domain can bind cAMP, cGMP, c-di-GMP, oxygen and 2-oxoglutarate (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).	Domain
A [auth D]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A [auth D]	PF00027	Cyclic nucleotide-binding domain (cNMP_binding)	Cyclic nucleotide-binding domain	This domain sensor domain can bind cAMP, cGMP, c-di-GMP, oxygen and 2-oxoglutarate (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
E	calmodulin-1	-	-	-
B [auth A], C [auth B], D [auth C]	cGMP-gated cation channel alpha-1	binding adenyl ribonucleotide binding cyclic nucleotide binding nucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding cAMP binding adenyl nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding cyclic nucleotide binding nucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding cAMP binding adenyl nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding protein-containing complex binding monoatomic cation transmembrane transporter activity monoatomic ion channel activity sodium channel activity sodium ion transmembrane transporter activity monoatomic cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity intracellularly ligand-gated monoatomic ion channel activity gated channel activity intracellularly cyclic nucleotide-activated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity intracellularly cAMP-activated cation channel activity ligand-gated monoatomic cation channel activity cyclic nucleotide-activated monoatomic ion channel activity calcium channel activity calcium ion transmembrane transporter activity guanyl nucleotide binding guanyl ribonucleotide binding cGMP binding intracellularly cGMP-activated cation channel activity	localization transport monoatomic ion transport monoatomic cation transport establishment of localization sodium ion transport metal ion transport multicellular organismal process sensory perception of light stimulus system process sensory perception nervous system process visual perception monoatomic cation transmembrane transport localization transport monoatomic ion transport monoatomic cation transport establishment of localization sodium ion transport metal ion transport multicellular organismal process sensory perception of light stimulus system process sensory perception nervous system process visual perception monoatomic cation transmembrane transport transmembrane transport monoatomic ion transmembrane transport cellular process calcium ion transport	protein-containing complex cellular anatomical structure transmembrane transporter complex membrane membrane protein complex transporter complex cell periphery plasma membrane rod photoreceptor outer segment membrane-bounded organelle non-motile cilium 9+0 non-motile cilium cilium neuron projection protein-containing complex cellular anatomical structure transmembrane transporter complex membrane membrane protein complex transporter complex cell periphery plasma membrane rod photoreceptor outer segment membrane-bounded organelle non-motile cilium 9+0 non-motile cilium cilium neuron projection photoreceptor outer segment plasma membrane bounded cell projection cell projection photoreceptor cell cilium organelle intracellular cyclic nucleotide activated cation channel complex cation channel complex monoatomic ion channel complex
A [auth D]	Cyclic nucleotide-gated cation channel beta-1	guanyl nucleotide binding binding cyclic nucleotide binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding cGMP binding guanyl nucleotide binding binding cyclic nucleotide binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding cGMP binding small molecule binding identical protein binding protein binding protein homodimerization activity protein dimerization activity adenyl ribonucleotide binding cAMP binding adenyl nucleotide binding protein-containing complex binding monoatomic cation transmembrane transporter activity monoatomic ion channel activity sodium channel activity sodium ion transmembrane transporter activity monoatomic cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity molecular sequestering activity molecular adaptor activity intracellularly ligand-gated monoatomic ion channel activity gated channel activity intracellularly cyclic nucleotide-activated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity intracellularly cAMP-activated cation channel activity ligand-gated monoatomic cation channel activity cyclic nucleotide-activated monoatomic ion channel activity calcium channel activity calcium ion transmembrane transporter activity intracellularly cGMP-activated cation channel activity	multicellular organismal process multicellular organismal-level homeostasis homeostatic process anatomical structure homeostasis tissue homeostasis retina homeostasis 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 multicellular organismal process multicellular organismal-level homeostasis homeostatic process anatomical structure homeostasis tissue homeostasis retina homeostasis 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 cellular process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process system process sensory perception of chemical stimulus sensory perception nervous system process sensory perception of smell localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport sodium ion transport sensory perception of light stimulus visual perception monoatomic cation transmembrane transport transmembrane transport monoatomic ion transmembrane transport calcium ion transport	membrane-bounded organelle non-motile cilium membrane plasma membrane non-motile cilium membrane cilium ciliary membrane plasma membrane bounded cell projection cell periphery cell projection cellular anatomical structure bounding membrane of organelle organelle plasma membrane region membrane-bounded organelle non-motile cilium membrane plasma membrane non-motile cilium membrane cilium ciliary membrane plasma membrane bounded cell projection cell periphery cell projection cellular anatomical structure bounding membrane of organelle organelle plasma membrane region organelle membrane cell projection membrane intracellular anatomical structure cytoplasm protein-containing complex 9+0 non-motile cilium neuron projection photoreceptor outer segment photoreceptor cell cilium photoreceptor outer segment membrane rod photoreceptor outer segment intracellular cyclic nucleotide activated cation channel complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A], C [auth B], D [auth C]	IPR005821	Ion transport domain	Domain
B [auth A], C [auth B], D [auth C]	IPR000595	Cyclic nucleotide-binding domain	Domain
B [auth A], C [auth B], D [auth C]	IPR032406	Cyclic nucleotide-gated channel, C-terminal leucine zipper domain	Domain
B [auth A], C [auth B], D [auth C]	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily
B [auth A], C [auth B], D [auth C]	IPR018488	Cyclic nucleotide-binding, conserved site	Conserved Site
B [auth A], C [auth B], D [auth C]	IPR050866	Cyclic nucleotide-gated cation channel	Family
B [auth A], C [auth B], D [auth C]	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily
A [auth D]	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily
A [auth D]	IPR018488	Cyclic nucleotide-binding, conserved site	Conserved Site
A [auth D]	IPR050866	Cyclic nucleotide-gated cation channel	Family
A [auth D]	IPR005821	Ion transport domain	Domain
A [auth D]	IPR000595	Cyclic nucleotide-binding domain	Domain
A [auth D]	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth D], B [auth A], C [auth B], D [auth C]	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	Cyclic nucleotide-gated ion channel

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth D], B [auth A], C [auth B], D [auth C]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth D], B [auth A], C [auth B], D [auth C]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	photoreceptor Cyclic-nucleotide-gated (CNGA1/B1) heterotetrameric channel with bound calmodulin

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.