Crystal structure of Mycobacterium tuberculosis ClpP1P2 suggests a model for peptidase activation by AAA+ partner binding and substrate delivery.
Schmitz, K.R., Carney, D.W., Sello, J.K., Sauer, R.T.(2014) Proc Natl Acad Sci U S A 111: E4587-E4595
- PubMed: 25267638 
- DOI: 10.1073/pnas.1417120111
- Primary Citation of Related Structures:  
4U0G, 4U0H - PubMed Abstract: 
Caseinolytic peptidase P (ClpP), a double-ring peptidase with 14 subunits, collaborates with ATPases associated with diverse activities (AAA+) partners to execute ATP-dependent protein degradation. Although many ClpP enzymes self-assemble into catalytically active homo-tetradecamers able to cleave small peptides, the Mycobacterium tuberculosis enzyme consists of discrete ClpP1 and ClpP2 heptamers that require a AAA+ partner and protein-substrate delivery or a peptide agonist to stabilize assembly of the active tetradecamer ...