Annotations: 8T50

Open human HCN1 F186C S264C bound to cAMP, reconstituted in LMNG + SPL

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth C]	WD40	e8t50C1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
D	WD40	e8t50D1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
C [auth A]	WD40	e8t50A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
B	WD40	e8t50B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], B, C [auth A], D	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A [auth C], B, C [auth A], 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
A [auth C], B, C [auth A], D	Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1	monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel 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 gated channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel 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 gated channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity voltage-gated monoatomic cation channel activity voltage-gated potassium channel activity ion binding binding phosphatidylinositol-4,5-bisphosphate binding anion binding phosphatidylinositol bisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate 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 cAMP binding adenyl nucleotide binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding phosphatidylinositol-3,4,5-trisphosphate binding 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 identical protein binding protein binding	transport monoatomic ion transmembrane transport potassium ion transmembrane transport establishment of localization metal ion transport monoatomic cation transmembrane transport transmembrane transport localization monoatomic ion transport potassium ion transport cellular process monoatomic cation transport response to stimulus response to metal ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport establishment of localization metal ion transport monoatomic cation transmembrane transport transmembrane transport localization monoatomic ion transport potassium ion transport cellular process monoatomic cation transport response to stimulus response to metal ion response to chemical response to calcium ion maternal behavior behavior multicellular organismal process parental behavior reproductive process multicellular organismal reproductive process reproductive behavior 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 biological process regulation of cellular process regulation of membrane depolarization membrane depolarization biological regulation regulation of biological quality regulation of membrane potential cellular response to nitrogen compound cellular response to stimulus response to organophosphorus 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 chemical stimulus cellular response to cAMP cellular response to interferon-beta response to peptide response to interferon-beta response to cytokine cellular response to cytokine stimulus heart process system process SA node cell to atrial cardiac muscle cell signaling regulation of heart contraction SA node cell to atrial cardiac muscle cell communication regulation of system process cell communication circulatory system process regulation of cardiac muscle cell action potential regulation of multicellular organismal process cell communication involved in cardiac conduction blood circulation regulation of action potential SA node cell action potential action potential regulation of blood circulation cardiac conduction regulation of SA node cell action potential regulation of cell communication cardiac muscle cell action potential heart contraction sodium ion transmembrane transport sodium ion transport positive regulation of biological process regulation of membrane hyperpolarization membrane hyperpolarization positive regulation of membrane hyperpolarization import into cell import across plasma membrane sodium ion import across plasma membrane inorganic cation import across plasma membrane inorganic ion import across plasma membrane negative regulation of action potential negative regulation of biological process response to acid chemical response to L-glutamate response to amino acid potassium ion import across plasma membrane regulation of heart rate by cardiac conduction regulation of heart rate	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface basal part of cell basal plasma membrane basolateral plasma membrane cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane cell surface basal part of cell basal plasma membrane basolateral plasma membrane somatodendritic compartment 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 [auth C], B, C [auth A], D	IPR013621	Ion transport N-terminal	Domain
A [auth C], B, C [auth A], D	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily
A [auth C], B, C [auth A], D	IPR018488	Cyclic nucleotide-binding, conserved site	Conserved Site
A [auth C], B, C [auth A], D	IPR005821	Ion transport domain	Domain
A [auth C], B, C [auth A], D	IPR051413	Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel	Family
A [auth C], B, C [auth A], D	IPR003938	Potassium channel, voltage-dependent, EAG/ELK/ERG-like	Family
A [auth C], B, C [auth A], D	IPR000595	Cyclic nucleotide-binding domain	Domain
A [auth C], B, C [auth A], D	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth C], B, C [auth A], D	: O60741	developmental and epileptic encephalopathy, 24 epilepsy developmental and epileptic encephalopathy, 1 Ataxia visual epilepsy astrocytic tumor large cell medulloblastoma malignant glioma atypical teratoid rhabdoid tumor pilocytic astrocytoma depressive disorder intellectual disability lung carcinoma atrial fibrillation medulloblastoma developmental and epileptic encephalopathy, 24 epilepsy developmental and epileptic encephalopathy, 1 Ataxia visual epilepsy astrocytic tumor large cell medulloblastoma malignant glioma atypical teratoid rhabdoid tumor pilocytic astrocytoma depressive disorder intellectual disability lung carcinoma atrial fibrillation medulloblastoma breast carcinoma oligodendroglioma primitive neuroectodermal tumor developmental and epileptic encephalopathy glioblastoma malignant ependymoma attention deficit hyperactivity disorder, inattentive type autism spectrum disorder

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth C], B, C [auth A], D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	HCN1 hyperpolarization-activated channel, F186C/S264C mutant, closed state, with bound cAMP, reconstituted in LMNG and SPL

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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.