1NED image
Deposition Date 1997-04-04
Release Date 1998-04-08
Last Version Date 2024-02-14
Entry Detail
PDB ID:
1NED
Keywords:
Title:
CRYSTAL STRUCTURE OF HSLV (CLPQ) AT 3.8 ANGSTROMS RESOLUTION
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.80 Å
R-Value Free:
0.31
R-Value Work:
0.25
R-Value Observed:
0.25
Space Group:
P 42 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:HSLV
Gene (Uniprot):hslV
Chain IDs:A, B, C
Chain Length:183
Number of Molecules:3
Biological Source:Escherichia coli
Ligand Molecules
Primary Citation
Crystal structure of heat shock locus V (HslV) from Escherichia coli.
Proc.Natl.Acad.Sci.USA 94 6070 6074 (1997)
PMID: 9177170 DOI: 10.1073/pnas.94.12.6070

Abstact

Heat shock locus V (HslV; also called ClpQ) is the proteolytic core of the ATP-dependent protease HslVU in Escherichia coli. It has sequence similarity with the beta-type subunits of the eukaryotic and archaebacterial proteasomes. Unlike these particles, which display 72-point symmetry, it is a dimer of hexamers with 62-point symmetry. The crystal structure of HslV at 3.8-A resolution, determined by isomorphous replacement and symmetry averaging, shows that in spite of the different symmetry of the particle, the fold and the contacts between subunits are conserved. A tripeptide aldehyde inhibitor, acetyl-Leu-Leu-norleucinal, binds to the N-terminal threonine residue of HslV, probably as a hemiacetal, relating HslV also functionally to the proteasomes of archaea and eukaryotes.

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Primary Citation of related structures