3.4.21.92 ATP - 710200, 734574 3.4.21.92 ATP ATP dependent, for full proteolytic activity ClpP must associate with one of two related ATPase subunits, ClpA or ClpX, other nucleoside triphosphates cannot substitute for ATP 653260 3.4.21.92 ATP ATP has two functions in activating Clp protease: an allosteric role in promoting association between the subunits and a mechanistically undefined role in promoting continuous rounds of peptide bond cleavage. The functions may be separately fulfilled by the two ATP-binding sites identified by sequence analysis on each ClpA subunit 29867 3.4.21.92 ATP ATP hydrolysis is required for protein breakdown but not for hydrolysis of small peptides 29864 3.4.21.92 ATP cleavage of peptides of more than five amino acids residues by ClpP requires activation by ClpA and either ATP or a nonhydrolyzable analog of ATP such as ATPgammaS or 5'-adenylyl imidodiphosphate 29858 3.4.21.92 ATP composed of the proteolytic subunit ClpP and the regulatory ATPase 653568 3.4.21.92 ATP only ATP and dATP support alpha-casein degradation 29858 3.4.21.92 ATP proteolytic activity 29860 3.4.21.92 dATP only ATP and dATP support alpha-casein degradation 29858 3.4.21.92 dATP proteolytic activity 29860 3.4.21.92 additional information degradation of GFP-K17 is MecA dependent and prevented in the presence of ComS, MecA and ComS can be degraded by ClpCP. ComS competes with ComK for MecA binding and protects MecA from degradation by ClpP. The degradation of ComS requires the presence of MecA, which acts as an adapter for both ComS and ComK. MecA knockout strain fails to target ComK for degradation by ClpCP 683866 3.4.21.92 additional information MecA facilitates ClpC oligomerization into a complex containing both ClpC and MecA. Formation of this complex is a prerequisite for all ClpC mediated activities, including ATPase activity, substrate recognition and interaction with ClpP 683899