5G1Q

Compressed conformation of Francisella tularensis ClpP at 2.84 A

Summary for 5G1Q

• Entry DOI: 10.2210/pdb5g1q/pdb
• Related: 5G1R 5G1S
• Descriptor: CLP PROTEASE PROTEOLYTIC SUBUNIT P (1 entity in total)
• Functional Keywords: hydrolase
• Biological source: FRANCISELLA TULARENSIS
• Total number of polymer chains: 7
• Total formula weight: 155242.43

Authors

Diaz-Saez, L.,Hunter, W.N. (deposition date: 2016-03-29, release date: 2016-10-19, Last modification date: 2024-01-10)

Primary citation

Diaz-Saez, L.,Pankov, G.,Hunter, W.N.
Open and compressed conformations of Francisella tularensis ClpP.
Proteins, 85:188-194, 2017

PubMed Abstract: Caseinolytic proteases are large oligomeric assemblies responsible for maintaining protein homeostasis in bacteria and in so doing influence a wide range of biological processes. The functional assembly involves three chaperones together with the oligomeric caseinolytic protease catalytic subunit P (ClpP). This protease represents a potential target for therapeutic intervention in pathogenic bacteria. Here, we detail an efficient protocol for production of recombinant ClpP from Francisella tularensis, and the structural characterization of three crystal forms which grow under similar conditions. One crystal form reveals a compressed state of the ClpP tetradecamer and two forms an open state. A comparison of the two types of structure infers that differences at the enzyme active site result from a conformational change involving a highly localized disorder-order transition of a β-strand α-helix combination. This transition occurs at a subunit-subunit interface. Our study may now underpin future efforts in a structure-based approach to target ClpP for inhibitor or activator development. Proteins 2016; 85:188-194. © 2016 Wiley Periodicals, Inc.

PubMed: 27802578
DOI: 10.1002/prot.25197

Experimental method

X-RAY DIFFRACTION (2.84 Å)