4LKU image
Deposition Date 2013-07-08
Release Date 2013-10-02
Last Version Date 2024-02-28
Entry Detail
PDB ID:
4LKU
Keywords:
TRANSPORT PROTEIN
Title:
Structure of the C-terminal domain of the E. coli mechanosensitive channel of large conductance
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 536056)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.45 Å
R-Value Free:
0.22
R-Value Work:
0.16
R-Value Observed:
0.17
Space Group:
P 1 21 1
4LKU validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Large-conductance mechanosensitive channel
Chain IDs:A, B, C, D, E
Chain Length:29
Number of Molecules:5
Biological Source:Escherichia coli
UniProt ID:P0A742
Primary Citation
Structure and stability of the C-terminal helical bundle of the E. coli mechanosensitive channel of large conductance.
Protein Sci. 22 1592 1601 (2013)
PMID: 24038743 DOI: 10.1002/pro.2360

Abstact

The crystal structure of the cytoplasmic domain (CTD) from the mechanosensitive channel of large conductance (MscL) in E. coli has been determined at 1.45 Å resolution. This domain forms a pentameric coiled coil similar to that observed in the structure of MscL from M. tuberculosis and also found in the cartilage oligomeric matrix protein (COMPcc). It contains canonical hydrophobic and atypical ionic interactions compared to previously characterized coiled coil structures. Thermodynamic analysis indicates that while the free EcMscL-CTD is less stable than other coiled coils, it is likely to remain folded in context of the full-length channel.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
4LKU