8DFL | pdb_00008dfl

Structure of human Kv1.3 with A0194009G09 nanobodies (alternate conformation)

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
H [auth D]	SCOP2B Superfamily	POZ domain	8067483	3000894	SCOP2B (2022-06-29)
G [auth C]	SCOP2B Superfamily	POZ domain	8067483	3000894	SCOP2B (2022-06-29)
F [auth B]	SCOP2B Superfamily	POZ domain	8067483	3000894	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	POZ domain	8067483	3000894	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 [auth H]	V-set_8	e8dflH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
D [auth G]	V-set_8	e8dflG1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
C [auth F]	V-set_8	e8dflF1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
B [auth E]	V-set_8	e8dflE1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
H [auth D]	Ion_trans	e8dflD2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)
H [auth D]	BTB_2	e8dflD1	A: a+b two layers	X: POZ domain (From Topology)	H: POZ domain (From Topology)	T: POZ domain	F: BTB_2	ECOD (1.6)
G [auth C]	Ion_trans	e8dflC2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)
G [auth C]	BTB_2	e8dflC1	A: a+b two layers	X: POZ domain (From Topology)	H: POZ domain (From Topology)	T: POZ domain	F: BTB_2	ECOD (1.6)
F [auth B]	Ion_trans	e8dflB3	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)
F [auth B]	BTB_2	e8dflB1	A: a+b two layers	X: POZ domain (From Topology)	H: POZ domain (From Topology)	T: POZ domain	F: BTB_2	ECOD (1.6)
A	Ion_trans	e8dflA3	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans	ECOD (1.6)
A	BTB_2	e8dflA1	A: a+b two layers	X: POZ domain (From Topology)	H: POZ domain (From Topology)	T: POZ domain	F: BTB_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D [auth G]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth F]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth E], C [auth F], D [auth G], E [auth H]	Heavy Chain	IGHV1	-	potassium voltage-gated channel subfamily a member 3,greenfluorescent protein fusion	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, F [auth B], G [auth C], H [auth D]	PF02214	BTB/POZ domain (BTB_2)	BTB/POZ domain	In voltage-gated K+ channels this domain is responsible for subfamily-specific assembly of alpha-subunits into functional tetrameric channels [1]. In KCTD1 (Swiss:Q719H9) this domain functions as a transcriptional repressor [2]. It also mediates homo ...	In voltage-gated K+ channels this domain is responsible for subfamily-specific assembly of alpha-subunits into functional tetrameric channels [1]. In KCTD1 (Swiss:Q719H9) this domain functions as a transcriptional repressor [2]. It also mediates homomultimerisation of KCTD1 and interaction of KCTD1 with the transcription factor AP-2-alpha [2-3].	Domain
A, F [auth B], G [auth C], H [auth D]	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
A, F [auth B], G [auth C], H [auth D]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth E], C [auth F], D [auth G], E [auth H]	Nanobody A0194009G09	-	-	-
A, F [auth B], G [auth C], H [auth D]	Potassium voltage-gated channel subfamily A member 3,Green fluorescent protein fusion	passive transmembrane transporter activity gated channel activity monoatomic ion channel activity channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity gated channel activity monoatomic ion channel activity channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity voltage-gated potassium channel activity metal ion transmembrane transporter activity delayed rectifier potassium channel activity	localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport monoatomic cation transmembrane transport transmembrane transport cellular process biological regulation action potential localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport monoatomic cation transmembrane transport transmembrane transport cellular process biological regulation action potential regulation of biological quality regulation of membrane potential cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis bioluminescence metabolic process generation of precursor metabolites and energy	cellular anatomical structure membrane intracellular anatomical structure perinuclear region of cytoplasm cytoplasm cell periphery plasma membrane axon cell projection neuron projection plasma membrane bounded cell projection voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex cellular anatomical structure membrane intracellular anatomical structure perinuclear region of cytoplasm cytoplasm cell periphery plasma membrane axon cell projection neuron projection plasma membrane bounded cell projection voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex potassium channel complex membrane protein complex cation channel complex transporter complex transmembrane transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, F [auth B], G [auth C], H [auth D]	IPR005821	Ion transport domain	Domain
A, F [auth B], G [auth C], H [auth D]	IPR003972	Potassium channel, voltage dependent, Kv1	Family
A, F [auth B], G [auth C], H [auth D]	IPR004050	Potassium channel, voltage dependent, Kv1.3	Family
A, F [auth B], G [auth C], H [auth D]	IPR028325	Voltage-gated potassium channel	Family
A, F [auth B], G [auth C], H [auth D]	IPR000210	BTB/POZ domain	Domain
A, F [auth B], G [auth C], H [auth D]	IPR003968	Potassium channel, voltage dependent, Kv	Family
A, F [auth B], G [auth C], H [auth D]	IPR003131	Potassium channel tetramerisation-type BTB domain	Domain
A, F [auth B], G [auth C], H [auth D]	IPR011333	SKP1/BTB/POZ domain superfamily	Homologous Superfamily
A, F [auth B], G [auth C], H [auth D]	IPR027359	Voltage-dependent channel domain superfamily	Homologous Superfamily
A, F [auth B], G [auth C], H [auth D]	IPR000786	Green fluorescent protein, GFP	Family
A, F [auth B], G [auth C], H [auth D]	IPR011584	Green fluorescent protein-related	Family
A, F [auth B], G [auth C], H [auth D]	IPR009017	Green fluorescent protein	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, F [auth B], G [auth C], H [auth D]	Pharos: P22001	interstitial cystitis lung carcinoma Lambert-Eaton myasthenic syndrome multiple sclerosis lung cancer pituitary cancer

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, F [auth B], G [auth C], H [auth D]	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	KvAP voltage-regulated K channels

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

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.