Annotations: 7N16

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D [auth C]	I-set	e7n16C1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (v294.1)
C [auth B]	I-set	e7n16B1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (v294.1)
B [auth A]	I-set	e7n16A1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (v294.1)
A [auth D]	I-set	e7n16D1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth D], B [auth A], C [auth B], D [auth C]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A [auth D], 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
A [auth D], 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth D], B [auth A], C [auth B], D [auth C]	Cyclic nucleotide-gated cation channel	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 monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel 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 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 intracellularly cGMP-activated cation channel activity identical protein binding protein binding	multicellular organismal process system process nervous system process response to stimulus detection of stimulus sensory perception of chemical stimulus sensory perception response to chemical detection of chemical stimulus detection of stimulus involved in sensory perception detection of chemical stimulus involved in sensory perception chemotaxis taxis aerotaxis multicellular organismal process system process nervous system process response to stimulus detection of stimulus sensory perception of chemical stimulus sensory perception response to chemical detection of chemical stimulus detection of stimulus involved in sensory perception detection of chemical stimulus involved in sensory perception chemotaxis taxis aerotaxis energy taxis response to external stimulus locomotion 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 cellular response to stimulus negative regulation of signaling signaling negative regulation of biological process regulation of signal transduction negative regulation of receptor guanylyl cyclase signaling pathway negative regulation of cell communication cell communication negative regulation of cellular process receptor guanylyl cyclase signaling pathway signal transduction enzyme-linked receptor protein signaling pathway regulation of signaling cell surface receptor signaling pathway negative regulation of response to stimulus negative regulation of signal transduction regulation of response to stimulus regulation of cell communication response to oxygen levels response to abiotic stimulus intracellular signal transduction calcium-mediated signaling intracellular signaling cassette cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis cellular component organization neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development cellular component organization or biogenesis system development developmental process plasma membrane bounded cell projection organization nervous system development generation of neurons anatomical structure morphogenesis neuron development positive regulation of growth regulation of growth growth positive regulation of growth rate regulation of growth rate axon extension axonogenesis regulation of cellular component size developmental growth regulation of biological quality developmental growth involved in morphogenesis regulation of cellular component organization regulation of developmental process cell growth regulation of axon extension regulation of extent of cell growth regulation of cell size neuron projection extension regulation of developmental growth developmental cell growth axon development regulation of cell growth cell morphogenesis involved in neuron differentiation regulation of anatomical structure size detection of carbon dioxide behavior chemosensory behavior regulation of cell differentiation regulation of neuron differentiation monoatomic cation transmembrane transport transmembrane transport localization transport monoatomic ion transmembrane transport monoatomic ion transport monoatomic cation transport establishment of localization phototransduction detection of light stimulus response to light stimulus detection of external stimulus detection of abiotic stimulus response to radiation olfactory behavior positive regulation of DNA-templated transcription RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II primary metabolic process positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process regulation of DNA-templated transcription G protein-coupled receptor signaling pathway coupled to cGMP nucleotide second messenger G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger G protein-coupled receptor signaling pathway thermosensory behavior response to temperature stimulus thermotaxis response to stress response to hyperoxia response to increased oxygen levels	cellular anatomical structure membrane membrane-bounded organelle cell projection ciliary inversin compartment organelle cilium plasma membrane bounded cell projection cell periphery plasma membrane somatodendritic compartment dendrite dendritic tree neuron projection cellular anatomical structure membrane membrane-bounded organelle cell projection ciliary inversin compartment organelle cilium plasma membrane bounded cell projection cell periphery plasma membrane somatodendritic compartment dendrite dendritic tree neuron projection non-motile cilium protein-containing complex transmembrane transporter complex membrane protein complex cation channel complex transporter complex monoatomic ion channel complex intracellular cyclic nucleotide activated cation channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth D], B [auth A], C [auth B], D [auth C]	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily
A [auth D], B [auth A], C [auth B], D [auth C]	IPR018488	Cyclic nucleotide-binding, conserved site	Conserved Site
A [auth D], B [auth A], C [auth B], D [auth C]	IPR050866	Cyclic nucleotide-gated cation channel	Family
A [auth D], B [auth A], C [auth B], D [auth C]	IPR005821	Ion transport domain	Domain
A [auth D], B [auth A], C [auth B], D [auth C]	IPR003938	Potassium channel, voltage-dependent, EAG/ELK/ERG-like	Family
A [auth D], B [auth A], C [auth B], D [auth C]	IPR000595	Cyclic nucleotide-binding domain	Domain
A [auth D], B [auth A], C [auth B], D [auth C]	IPR032406	Cyclic nucleotide-gated channel, C-terminal leucine zipper domain	Domain
A [auth D], B [auth A], C [auth B], D [auth C]	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily

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: MemProtMD MemProtMD Database Homepage

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

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	Cyclic-nucleotide-gated (CNG) channel TAX-4, R421W mutant, apo open state

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.