1exb image
Entry Detail
PDB ID:
1EXB
Keywords:
METAL TRANSPORT
Title:
STRUCTURE OF THE CYTOPLASMIC BETA SUBUNIT-T1 ASSEMBLY OF VOLTAGE-DEPENDENT K CHANNELS
Biological Source:
Source Organism:
Rattus norvegicus
Host Organism:
unidentified baculovirus
PDB Version:
Deposition Date:
2000-05-02
Release Date:
2000-07-19
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.10 Å
R-Value Free:
0.22
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 4 21 2
1exb validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:KV BETA2 PROTEIN
Chain IDs:A
Chain Length:332
Number of Molecules:1
Biological Source:Rattus norvegicus
UniProt ID:P62483 Pfam ID:PF00248
Protein Blast
Polymer Type:polypeptide(L)
Description:POTASSIUM CHANNEL KV1.1
Chain IDs:B (auth: E)
Chain Length:103
Number of Molecules:1
Biological Source:Rattus norvegicus
UniProt ID:P10499 Pfam ID:PF02214
Ligand Molecules
NDP
Primary Citation
Structure of the cytoplasmic beta subunit-T1 assembly of voltage-dependent K+ channels.
Science 289 123 127 (2000)
PMID: 10884227 DOI: 10.1126/science.289.5476.123

Abstact

The structure of the cytoplasmic assembly of voltage-dependent K+ channels was solved by x-ray crystallography at 2.1 angstrom resolution. The assembly includes the cytoplasmic (T1) domain of the integral membrane alpha subunit together with the oxidoreductase beta subunit in a fourfold symmetric T1(4)beta4 complex. An electrophysiological assay showed that this complex is oriented with four T1 domains facing the transmembrane pore and four beta subunits facing the cytoplasm. The transmembrane pore communicates with the cytoplasm through lateral, negatively charged openings above the T1(4)beta4 complex. The inactivation peptides of voltage-dependent K(+) channels reach their site of action by entering these openings.

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Primary Citation of related structures
1QRQ
1T1D