IndraLab
Statements
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"The k cat and K M values are presented as means ± SD (n = 3), and the K D values were obtained through steady-state analysis (see Supplemental Experimental Procedures for technical discussion). (B) Time course of USP12 modification by the suicidal Ub-VME substrate in the absence or presence of UAF1 and WDR20. (C) Time course of LRGG-AMC (top) in contrast to Ub-AMC (bottom) hydrolysis by USP12 (green), UAF1-USP12 (orange), and USP12-WDR20 (red)."
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"In the two UAF1-USP12 complex structures, UAF1 binding appears to induce BL1 destabilization via a chain of conformational changes, whereas the WDR20-USP12 interaction seems to overwrite the allosteric effect of UAF1 by (D and E) Rates of Ub-AMC hydrolysis by wild-type (WT) and mutant USP12 in the presence of UAF1 (D) or WDR20 (E)."
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"Allosteric Activation of Ubiquitin-Specific Proteases by b-Propeller Proteins UAF1 and WDR20 Molecular Cell Article Allosteric Activation of Ubiquitin-Specific Proteases by b-Propeller Proteins UAF1 and WDR20.Highlights d Free USP12 deubiquitinase is inactive and has several flexible structural elements d UAF1 and WDR20 can both activate USP12 without increasing its substrate affinity d UAF1 and WDR20 bind USP12 at two distinct sites away from its catalytic center d Two distinct allosteric mechanisms underlie USP12 activation by UAF1 and WDR20Ubiquitin-specific proteases (USPs) constitute the largest family of deubiquitinating enzymes, whose catalytic competency is often modulated by their binding partners through unknown mechanisms.Here we report on a series of crystallographic and biochemical analyses of an evolutionarily conserved deubiquitinase, USP12, which is activated by two b-propeller proteins, UAF1 and WDR20."