ISDA

Entry Detail

PDB ID:

6VFX

EMDB ID:

EMD-21194

Keywords:

HYDROLASE

Title:

ClpXP from Neisseria meningitidis - Conformation B

Biological Source:

Source Organism:

Neisseria meningitidis, Escherichia coli BL21(DE3)

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2020-01-06

Release Date:

2020-01-22

Method Details:

Experimental Method:

ELECTRON MICROSCOPY

Resolution:

2.90 Å

Aggregation State:

PARTICLE

Reconstruction Method:

SINGLE PARTICLE

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:ATP-dependent Clp protease ATP-binding subunit ClpX
Chain IDs:A (auth: C), B, C (auth: E), D (auth: F), E (auth: D), F (auth: A)
Chain Length:414
Number of Molecules:6
Biological Source:Neisseria meningitidis

UniProt ID:Q9JYY3 Pfam ID:PF06689, PF07724, PF10431

Polymer Type:polypeptide(L)
Description:Unidentified peptide substrate
Chain IDs:G
Chain Length:7
Number of Molecules:1
Biological Source:Escherichia coli BL21(DE3)

Protein Blast

Polymer Type:polypeptide(L)
Description:ATP-dependent Clp protease proteolytic subunit
Chain IDs:H (auth: L), I (auth: O), J (auth: P), K (auth: Q), L (auth: R), M (auth: S), N (auth: T), O (auth: U), P (auth: H), Q (auth: I), R (auth: J), S (auth: K), T (auth: M), U (auth: N)
Chain Length:204
Number of Molecules:14
Biological Source:Neisseria meningitidis

UniProt ID:Q9JZ38 Pfam ID:PF00574

Ligand Molecules

ADP

ATP

Primary Citation

A processive rotary mechanism couples substrate unfolding and proteolysis in the ClpXP degradation machinery.

Ripstein, Z.A, Vahidi, S, Houry, W.A, Rubinstein, J.L, Kay, L.E.Show

Elife 9 ? ? (2020)

PMID: 31916936 DOI: 10.7554/eLife.52158

Abstact

The ClpXP degradation machine consists of a hexameric AAA+ unfoldase (ClpX) and a pair of heptameric serine protease rings (ClpP) that unfold, translocate, and subsequently degrade client proteins. ClpXP is an important target for drug development against infectious diseases. Although structures are available for isolated ClpX and ClpP rings, it remains unknown how symmetry mismatched ClpX and ClpP work in tandem for processive substrate translocation into the ClpP proteolytic chamber. Here, we present cryo-EM structures of the substrate-bound ClpXP complex from Neisseria meningitidis at 2.3 to 3.3 Å resolution. The structures allow development of a model in which the sequential hydrolysis of ATP is coupled to motions of ClpX loops that lead to directional substrate translocation and ClpX rotation relative to ClpP. Our data add to the growing body of evidence that AAA+ molecular machines generate translocating forces by a common mechanism.

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Protein

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Disease

Primary Citation of related structures