1qdw

N-TERMINAL DOMAIN, VOLTAGE-GATED POTASSIUM CHANNEL KV1.2 RESIDUES 33-119

Method: X-RAY DIFFRACTION D_max: 112.7 Å Quality: GOOD

▼

1. Protein Identity and Related Structures Protein Identity & Related Structures

KV1.2 VOLTAGE-GATED POTASSIUM CHANNEL

Rattus norvegicus

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric（4） Consistent with protein copy count	Chain A； UniProt 33–119 Chain B； UniProt 33–119 Chain C； UniProt 33–119 Chain D； UniProt 33–119	Fragment：N-TERMINAL DOMAIN KV1.2, RESIDUES 33-119 (CORE)	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；9% PEG 1500, 5% N-PROPANOL, 120 MM GDHCL 50 MM MES PH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.10 Å R-free 0.266
2	Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric（4） Consistent with protein copy count	Chain E； UniProt 33–119 Chain F； UniProt 33–119 Chain G； UniProt 33–119 Chain H； UniProt 33–119	Fragment：N-TERMINAL DOMAIN KV1.2, RESIDUES 33-119 (CORE)	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；9% PEG 1500, 5% N-PROPANOL, 120 MM GDHCL 50 MM MES PH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.10 Å R-free 0.266

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 1QDW	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1DSX KV1.2 T1 DOMAIN, RESIDUES 33-119, T46V MUTANT Deposited 2000-01-10	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain B 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain C 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain D 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119	Mutation：YES Mutation：YES Mutation：YES Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 8.5；22% PEG 1500, 5 % ISOPROPANOL, 200 MM NA ACETATE, 12 MM SRCL2, 50 MM TRIS, PH 8.5, pH 8.50	Resolution 1.60 Å R-free 0.279
1DSX KV1.2 T1 DOMAIN, RESIDUES 33-119, T46V MUTANT Deposited 2000-01-10	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain E 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain F 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain G 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119 Chain H 33–119（87 aa） Fragment：N-TERMINAL ASSEMBLY DOMAIN, RESIDUES 33-119	Mutation：YES Mutation：YES Mutation：YES Mutation：YES	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 8.5；22% PEG 1500, 5 % ISOPROPANOL, 200 MM NA ACETATE, 12 MM SRCL2, 50 MM TRIS, PH 8.5, pH 8.50	Resolution 1.60 Å R-free 0.279
1QDV N-TERMINAL DOMAIN, VOLTAGE-GATED POTASSIUM CHANNEL KV1.2 RESIDUES 33-131 Deposited 1999-07-10	Different construct Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 33–131（99 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 33-131 Chain B 33–131（99 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 33-131 Chain C 33–131（99 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 33-131 Chain D 33–131（99 aa） Fragment：N-TERMINAL DOMAIN, RESIDUES 33-131	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；19% PEG 4000, 100 MM NH4 ACETATE, 21% METHANOL, MES PH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.60 Å R-free 0.278
2A79 Mammalian Shaker Kv1.2 potassium channel- beta subunit complex Deposited 2005-07-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–499（499 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 24	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；peg 400, potassium chloride, tris buffer, EDTA, DTT, TCEP, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.90 Å R-free 0.252
3LNM F233W mutant of the Kv2.1 paddle-Kv1.2 chimera channel Deposited 2010-02-02	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain D 1–266（266 aa） Chain D 303–499（197 aa）	Mutation：C31S, C32S, N207Q, F233W, C431S, C478S Mutation：C31S, C32S, N207Q, F233W, C431S, C478S	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4 K POTASSIUM ION × 20	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；25-28% PEG 400, 50mM Tris-HCl, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.90 Å R-free 0.247
3LNM F233W mutant of the Kv2.1 paddle-Kv1.2 chimera channel Deposited 2010-02-02	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 303–499（197 aa）	Mutation：C31S, C32S, N207Q, F233W, C431S, C478S Mutation：C31S, C32S, N207Q, F233W, C431S, C478S	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 48 K POTASSIUM ION × 20	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；25-28% PEG 400, 50mM Tris-HCl, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.90 Å R-free 0.247
3LUT A Structural Model for the Full-length Shaker Potassium Channel Kv1.2 Deposited 2010-02-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–499（499 aa）	Mutation：N207Q	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 24	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.90 Å R-free 0.221
4JTA Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Charybdotoxin Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 12 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 64	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, POTASSIUM CHLORIDE, TRIS , pH 8.9, vapor diffusion, hanging drop, temperature 293K	Resolution 2.50 Å R-free 0.236
4JTA Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Charybdotoxin Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 9 PDB declaration: nonameric	Chain Q 1–266（266 aa） Chain Q 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 12 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, POTASSIUM CHLORIDE, TRIS , pH 8.9, vapor diffusion, hanging drop, temperature 293K	Resolution 2.50 Å R-free 0.236
4JTC Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Charybdotoxin in Cs+ Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 CS CESIUM ION × 16 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 64	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, Cesium CHLORIDE, TRIS BUFFER, pH 8.9, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.56 Å R-free 0.262
4JTC Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Charybdotoxin in Cs+ Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 9 PDB declaration: nonameric	Chain H 1–266（266 aa） Chain H 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 CS CESIUM ION × 16 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, Cesium CHLORIDE, TRIS BUFFER, pH 8.9, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.56 Å R-free 0.262
4JTD Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Lys27Met mutant of Charybdotoxin Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 16 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 64	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, POTASSIUM CHLORIDE, TRIS , pH 8.9, vapor diffusion, hanging drop, temperature 293K	Resolution 2.54 Å R-free 0.235
4JTD Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Lys27Met mutant of Charybdotoxin Deposited 2013-03-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 9 PDB declaration: nonameric	Chain H 1–266（266 aa） Chain H 304–499（196 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 K POTASSIUM ION × 16 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.9；293 K；PEG 400, POTASSIUM CHLORIDE, TRIS , pH 8.9, vapor diffusion, hanging drop, temperature 293K	Resolution 2.54 Å R-free 0.235
5WIE Crystal structure of a Kv1.2-2.1 chimera K+ channel V406W mutant in an inactivated state Deposited 2017-07-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–42（42 aa）	Mutation：V406W	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 20 K POTASSIUM ION × 16	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 8；293 K；50 mM Tris-Cl pH 8.3, 29-31% PEG400	Resolution 3.30 Å R-free 0.243
5WIE Crystal structure of a Kv1.2-2.1 chimera K+ channel V406W mutant in an inactivated state Deposited 2017-07-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain H 1–42（42 aa）	Mutation：V406W	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 PGW (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4 K POTASSIUM ION × 16	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 8；293 K；50 mM Tris-Cl pH 8.3, 29-31% PEG400	Resolution 3.30 Å R-free 0.243
6EBK The voltage-activated Kv1.2-2.1 paddle chimera channel in lipid nanodiscs Deposited 2018-08-06	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 303–499（197 aa） Chain D 1–266（266 aa） Chain D 303–499（197 aa） Chain F 1–266（266 aa） Chain F 303–499（197 aa） Chain H 1–266（266 aa） Chain H 303–499（197 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE；A 3 microliter sample was applied to a plasma-cleaned grid and blotted for 10 seconds.	Resolution 3.30 Å
6EBL The voltage-activated Kv1.2-2.1 paddle chimera channel in lipid nanodiscs, cytosolic domain Deposited 2018-08-06	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 8 PDB declaration: octameric	Chain B 1–266（266 aa） Chain B 303–499（197 aa） Chain D 1–266（266 aa） Chain D 303–499（197 aa） Chain F 1–266（266 aa） Chain F 303–499（197 aa） Chain H 1–266（266 aa） Chain H 303–499（197 aa）	Not recorded	NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE；A 3 microliter sample was applied to a plasma-cleaned grid and blotted for 10 seconds.	Resolution 3.00 Å
6EBM The voltage-activated Kv1.2-2.1 paddle chimera channel in lipid nanodiscs, transmembrane domain of subunit alpha Deposited 2018-08-06	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain B 1–266（266 aa） Chain B 303–499（197 aa） Chain D 1–266（266 aa） Chain D 303–499（197 aa） Chain F 1–266（266 aa） Chain F 303–499（197 aa） Chain H 1–266（266 aa） Chain H 303–499（197 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE；A 3 microliter sample was applied to a plasma-cleaned grid and blotted for 10 seconds.	Resolution 4.00 Å
8VC3 Voltage gated potassium ion channel Kv1.2 in complex with DTx Deposited 2023-12-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain B 1–499（499 aa） Chain C 1–499（499 aa） Chain D 1–499（499 aa） Chain E 1–499（499 aa）	Not recorded	K POTASSIUM ION × 2	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.20 Å
8VC4 Voltage gated potassium ion channel Kv1.2 in Sodium Deposited 2023-12-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–499（499 aa） Chain B 1–499（499 aa） Chain C 1–499（499 aa） Chain D 1–499（499 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.17 Å
8VC6 Voltage gated potassium ion channel Kv1.2 in Potassium Deposited 2023-12-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–499（499 aa） Chain B 1–499（499 aa） Chain C 1–499（499 aa） Chain D 1–499（499 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.17 Å
8VCH Voltage gated potassium ion channel Kv1.2 W366F, C-type inactivated Deposited 2023-12-14	Different construct Different mutation/modification Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–499（499 aa） Chain B 1–499（499 aa） Chain C 1–499（499 aa） Chain D 1–499（499 aa）	Mutation：W366F Mutation：W366F Mutation：W366F Mutation：W366F	K POTASSIUM ION × 2	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.55 Å

16 other PDB entries and 22 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	KCNA2_RAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–87； UniProt 33–119 Author chain B； PDBConstruct 1–87； UniProt 33–119 Author chain C； PDBConstruct 1–87； UniProt 33–119 Author chain D； PDBConstruct 1–87； UniProt 33–119 Author chain E； PDBConstruct 1–87； UniProt 33–119 Author chain F； PDBConstruct 1–87； UniProt 33–119 Author chain G； PDBConstruct 1–87； UniProt 33–119 Author chain H； PDBConstruct 1–87； UniProt 33–119

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1qdw
Deposition date deposition_date	1999-07-10
Structure title title	N-TERMINAL DOMAIN, VOLTAGE-GATED POTASSIUM CHANNEL KV1.2 RESIDUES 33-119
Keywords keywords	VOLTAGE-GATED POTASSIUM CHANNEL, TETRAMERIZATION DOMAIN, INTRACELLULAR GATE, TETRAMER, SIGNALING PROTEIN; SIGNALING PROTEIN
Experimental Method method	X-RAY DIFFRACTION

▼

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	34.11 Å
Radius of gyration Rg (electron density) rg_electron	34.05 Å
Forward intensity I(0) i0	103001000.00
Molecular weight molecular_weight	83888.0 kDa
Excluded volume excluded_volume	106120 Å³
Envelope volume envelope_volume	132760 Å³
Hydration-shell volume shell_volume	34161 Å³
Envelope diameter envelope_diameter	121.0 Å
Shell Rg shell_rg	38.45 Å
Envelope Rg envelope_rg	33.81 Å
Shape Rg shape_rg	34.02 Å
Total Rg total_rg	34.50 Å
Total atoms total_atoms	5952
Residues n_residues	696
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

▼

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	112.7 Å
Rg (real space) rg_real	34.36 Å
Rg uncertainty (real space) rg_real_error	0.89 Å
I(0) (real space) i0_real	1.0300e+08
I(0) uncertainty (real space) i0_real_error	1.8470e+06
Rg (reciprocal space) rg_reciprocal	34.21 Å
I(0) (reciprocal space) i0_reciprocal	103000000.0000
Solution quality estimate total_estimate	0.8153
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	29.4 Å
Skewness Skewness skewness	0.478
Kurtosis Kurtosis kurtosis	-0.591
Angular range angular_range	— – 0.2300 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	35630000.0000
Real-space data points n_real_points	47
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.682; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.828; Smooth: 0.719

▶

5. Crystallography and Experiment 5. Crystallography & Experiment

▶

6. Entities and Polymers Entities & Polymers (2)

▼

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1qdwa_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwd_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwe_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwf_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwg_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

Domain ID domain_id	d1qdwh_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.2 — Tetramerization domain of potassium channels

CATH v4.4 (8 domains)

Domain ID domain_id	1qdwA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwE00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwF00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwG00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	1qdwH00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

▶

8. Citations (1)

▶

Unit-cell length a length_a	76.260 Å
Unit-cell length b length_b	78.740 Å
Unit-cell length c length_c	125.320 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	32

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2230
R_work r_work	0.2230
R_free r_free	0.2660

Description description	KV1.2 VOLTAGE-GATED POTASSIUM CHANNEL
Molecular weight formula_weight	10498.0 kDa
Source method src_method	man
Copy count entity_count	8

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	6491

N-TERMINAL DOMAIN, VOLTAGE-GATED POTASSIUM CHANNEL KV1.2 RESIDUES 33-119

1. Protein Identity and Related Structures Protein Identity & Related Structures

KV1.2 VOLTAGE-GATED POTASSIUM CHANNEL

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 water

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)

来源生物 organism	Rattus norvegicus
通用名 common_name	Norway rat
NCBI Class编号 ncbi_taxonomy_id	10116
宿主生物 host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	539

fit	/app/data/saxs_computation/qd/1qdw/1qdw.fit
pddf	/app/data/pr_computation/qd/1qdw/1qdw.pr.out
profile	/app/data/saxs_computation/qd/1qdw/1qdw.dat