catalytic pocket. Only certain inhibitors cause PDE4A4 foci formation, and the structural features responsible for driving the process are defined. Switching to the UCR2-capped state induces conformational transition in the enzyme’s regulatory N-terminal portion, facilitating protein association events responsible for reversible aggregate assembly. PDE4-selective inhibitors able to trigger relocalization
对PDE4
抑制剂的调查显示,某些化合物通过与泛素结合支架蛋白p62(SQSTM1)缔合而触发PDE4A4的细胞内聚集进入增生灶。我们表明,这种影响是由
抑制剂在催化口袋中的占据和“封顶状态”的稳定所驱动的,在该状态中,酶的上游保守区2(UCR2)模块内的序列折叠穿过催化口袋。仅某些
抑制剂会导致PDE4A4病灶形成,并且定义了负责驱动该过程的结构特征。切换到UCR2上限状态会诱导酶的调节性N末端部分发生构象转变,从而促进负责可逆聚集体组装的蛋白质缔合事件。