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7m2j

Structural Snapshots of Intermediates in the Gating of a K+ Channel

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

pH-gated potassium channel KcsA

Streptomyces lividans

UniProt P0A334

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 12 Monoclonal antibody (IgG) against KcsA, Fab heavy chain × 4 Monoclonal antibody (IgG) against KcsA, Fab light chain × 4 POTASSIUM ION × 12 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer
1bl8 1f6g 1j95 1jq1 1jq2 1jvm 2p7t 2qto 3ifx 4msw 5e1a

11 assemblies

Other homooligomers
1jvm 3ifx

2 assemblies

Heteromeric or nucleic-acid complex
1k4c 1k4d 1r3i 1r3j 1r3k 1r3l 1zwi 2a9h 2atk 2bob 2boc 2dwd

84 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name KCSA_STRLI
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–91； UniProt 26–116

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_id7m2j
Deposition date deposition_date2021-03-16
Structure title titleStructural Snapshots of Intermediates in the Gating of a K+ Channel
Keywords keywordsIon channel, K+ channel, pH gated ion channel, TRANSPORT PROTEIN-IMMUNE SYSTEM complex; TRANSPORT PROTEIN/IMMUNE SYSTEM
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.

7m2j__assembly_1__model_1

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

Download this curve (.dat)

7m2j__assembly_1__model_1 | I(q)

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

7m2j__assembly_1__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）46.03 Å
Rg (electron density)45.37 Å
Total Rg45.76 Å
Atom count15783
Residues2108
Excluded volume280020 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 7m2j__assembly_1__model_1 dodecameric （12） 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 (4)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id7m2jA01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7m2jA02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7m2jB01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7m2jB02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
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7. Citations (1)