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2r9r

Shaker family voltage dependent potassium channel (kv1.2-kv2.1 paddle chimera channel) in association with beta subunit

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Voltage-gated potassium channel subunit beta-2

Rattus norvegicus

UniProt P62483

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 8 Paddle chimera voltage gated potassium channel Kv1.2-Kv2.1 × 4 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 POTASSIUM ION × 16 (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 64 water × 8 Consistent with protein count
2 Protein heterocomplex Heteromer Protein 8 Paddle chimera voltage gated potassium channel Kv1.2-Kv2.1 × 4 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 POTASSIUM ION × 16 (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 4 water × 8 Consistent with protein count
3 Protein heterocomplex Heteromer Protein 16 Paddle chimera voltage gated potassium channel Kv1.2-Kv2.1 × 8 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 8 POTASSIUM ION × 32 (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate × 68 water × 16 Consistent with protein count
4 Protein homooligomer Homooligomer Protein 4 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 water × 4 Consistent with protein count
6 Protein homooligomer Homooligomer Protein 4 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer
1qrq 2r9r 2r9r 3eau 3eb3 3eb4

6 assemblies

Other homooligomers
1qrq 6ci1

2 assemblies

Heteromeric or nucleic-acid complex
1exb 2a79 2r9r 2r9r 2r9r 3lnm 3lnm 3lut 4jta 4jta 4jtc 4jtc

22 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name KCAB2_RAT
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 2–333； UniProt 36–367 Author chain G； PDBConstruct 2–333； UniProt 36–367

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id2r9r
Deposition date deposition_date2007-09-13
Structure title titleShaker family voltage dependent potassium channel (kv1.2-kv2.1 paddle chimera channel) in association with beta subunit
Keywords keywords;POTASSIUM CHANNEL, VOLTAGE SENSOR, VOLTAGE DEPENDENT, ION CHANNEL, SHAKER, MEMBRANE PROTEIN, EUKARYOTIC, KV1.2, KV2.1, PADDLE CHIMERA CHANNEL, Ion transport, Ionic channel, NADP, Phosphorylation, Potassium transport, Transport, Voltage-gated channel, PROTEIN TRANSPORT, TRANSPORT PROTEIN ;; MEMBRANE PROTEIN, TRANSPORT PROTEIN
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2r9r__assembly_7__model_1

Assembly 7 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2r9r__assembly_7__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

2r9r__assembly_7__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）40.11 Å
Rg (electron density)39.25 Å
Total Rg39.51 Å
Atom count11928
Residues1452
Excluded volume216470 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 2r9r__assembly_1__model_1 octameric （8） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 2r9r__assembly_2__model_1 octameric （8） Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 2r9r__assembly_3__model_1 hexadecameric （16） Success 4.1.3-1-20251215 (887e7ef) View Download
4 1 2r9r__assembly_4__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
5 1 2r9r__assembly_5__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
6 1 2r9r__assembly_6__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
7 1 2r9r__assembly_7__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (6)

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd2r9ra_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamilyc.1.7 — NAD(P)-linked oxidoreductase
Family Family familyc.1.7.1 — Aldo-keto reductases (NADP)
Domain ID domain_idd2r9rg_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamilyc.1.7 — NAD(P)-linked oxidoreductase
Family Family familyc.1.7.1 — Aldo-keto reductases (NADP)

CATH v4.4 (8 domains)

Domain ID domain_id2r9rA00
Class class3 — Alpha Beta
Architecture architecture20 — Alpha-Beta Barrel
Topology topology20 — TIM Barrel
Homologous superfamily homologous superfamily100 — NADP-dependent oxidoreductase domain
Domain ID domain_id2r9rB01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily10 — Potassium Channel Kv1.1; Chain A
Domain ID domain_id2r9rB02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily350 — Voltage-gated potassium channels. Chain C
Domain ID domain_id2r9rB03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology287 — Helix Hairpins
Homologous superfamily homologous superfamily70 —
Domain ID domain_id2r9rG00
Class class3 — Alpha Beta
Architecture architecture20 — Alpha-Beta Barrel
Topology topology20 — TIM Barrel
Homologous superfamily homologous superfamily100 — NADP-dependent oxidoreductase domain
Domain ID domain_id2r9rH01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily10 — Potassium Channel Kv1.1; Chain A
Domain ID domain_id2r9rH02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily350 — Voltage-gated potassium channels. Chain C
Domain ID domain_id2r9rH03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology287 — Helix Hairpins
Homologous superfamily homologous superfamily70 —
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7. Citations (2)