3U0Z

Tetramerization dynamics of the C-terminus underlies isoform-specific cAMP-gating in HCN channels

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3u0za_	All beta proteins	Double-stranded beta-helix	cAMP-binding domain-like	cAMP-binding domain	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B	d3u0zb_	All beta proteins	Double-stranded beta-helix	cAMP-binding domain-like	cAMP-binding domain	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	cNMP-binding domain	8067909	4000272	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	cAMP-binding domain-like	8067910	3000084	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	cAMP-binding domain-like	8067910	3000084	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	PF00027	e3u0zA1	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
B	PF00027	e3u0zB1	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.287.630	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Helix hairpin bin	CATH (4.3.0)
A	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)
B	1.10.287.630	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Helix hairpin bin	CATH (4.3.0)
B	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A, B	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, B	Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1	monoatomic cation transmembrane transporter activity intracellularly ligand-gated monoatomic ion channel activity gated channel activity monoatomic ion channel activity intracellularly cyclic nucleotide-activated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity intracellularly cAMP-activated cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity ligand-gated monoatomic cation channel activity cyclic nucleotide-activated monoatomic ion channel activity monoatomic cation transmembrane transporter activity intracellularly ligand-gated monoatomic ion channel activity gated channel activity monoatomic ion channel activity intracellularly cyclic nucleotide-activated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity intracellularly cAMP-activated cation channel activity passive transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity ligand-gated monoatomic cation channel activity cyclic nucleotide-activated monoatomic ion channel activity transmembrane transporter activity intracellular cAMP-activated cation channel activity involved in regulation of presynaptic membrane potential potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity voltage-gated potassium channel activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity metal ion transmembrane transporter activity binding ion binding phosphatidylinositol-4,5-bisphosphate binding anion binding phosphatidylinositol bisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding phosphatidylinositol binding small molecule binding voltage-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity adenyl ribonucleotide binding cyclic nucleotide binding nucleotide binding purine ribonucleotide binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding cAMP binding adenyl nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding phosphatidylinositol-3,4,5-trisphosphate binding identical protein binding protein binding	protein localization localization cellular localization apical protein localization cellular macromolecule localization macromolecule localization cellular process transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport establishment of localization metal ion transport inorganic cation transmembrane transport protein localization localization cellular localization apical protein localization cellular macromolecule localization macromolecule localization cellular process transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport establishment of localization metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport monoatomic ion transport potassium ion transport monoatomic cation transport regulation of biological process biological regulation regulation of membrane hyperpolarization regulation of biological quality membrane hyperpolarization regulation of membrane potential response to stimulus response to metal ion response to chemical response to calcium ion response to inorganic substance behavior multicellular organismal process general adaptation syndrome response to stress general adaptation syndrome, behavioral process multicellular organismal response to stress protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis regulation of cellular process regulation of membrane depolarization membrane depolarization regulation of postsynaptic membrane potential cellular response to stimulus cellular response to nitrogen compound response to organic substance response to organonitrogen compound response to endogenous stimulus response to organophosphorus cellular response to organic cyclic compound response to oxygen-containing compound response to nitrogen compound response to purine-containing compound response to cAMP cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to chemical stimulus cellular response to organonitrogen compound cellular response to cAMP cellular response to organic substance response to organic cyclic compound sodium ion transmembrane transport sodium ion transport system process nervous system process action potential transmission of nerve impulse cell communication neuronal action potential positive regulation of biological process positive regulation of membrane hyperpolarization regulation of action potential negative regulation of action potential negative regulation of biological process cellular developmental process sensory organ development photoreceptor cell differentiation visual system development retina development in camera-type eye cell development neural retina development eye morphogenesis multicellular organism development neurogenesis neuron differentiation cell differentiation retinal cone cell differentiation eye photoreceptor cell differentiation anatomical structure development animal organ morphogenesis sensory system development system development photoreceptor cell development developmental process camera-type eye morphogenesis eye development eye photoreceptor cell development animal organ development retinal cone cell development nervous system development camera-type eye photoreceptor cell differentiation generation of neurons retina morphogenesis in camera-type eye anatomical structure morphogenesis sensory organ morphogenesis neuron development camera-type eye development	cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region cellular anatomical entity synaptic membrane somatodendritic compartment cell surface basal part of cell basal plasma membrane cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region cellular anatomical entity synaptic membrane somatodendritic compartment cell surface basal part of cell basal plasma membrane basolateral plasma membrane cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection glutamatergic synapse presynaptic active zone membrane presynaptic membrane presynapse presynaptic active zone cell leading edge leading edge membrane neuron projection membrane dendrite membrane cell projection membrane dendritic shaft voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex HCN channel complex potassium channel complex membrane protein complex cation channel complex transporter complex transmembrane transporter complex monoatomic ion channel complex cell body neuronal cell body axon apical dendrite axon terminus distal axon neuron projection terminus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR013621	Ion transport N-terminal	Domain
A, B	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily
A, B	IPR018488	Cyclic nucleotide-binding, conserved site	Conserved Site
A, B	IPR005821	Ion transport domain	Domain
A, B	IPR003938	Potassium channel, voltage-dependent, EAG/ELK/ERG	Family
A, B	IPR000595	Cyclic nucleotide-binding domain	Domain
A, B	IPR018490	Cyclic nucleotide-binding 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.