毒理性
金霉素是一类混合型、非竞争性抑制剂,能够抑制ATP的水解和合成。它们通过绑定到F1F0-ATP合酶的F1催化部分的β亚单位来抑制质子泵送的F1F0-ATP合酶。F1F0-ATP合酶负责氧化磷酸化的最后一步。每个ATP合酶复合物有三个β亚单位,金霉素被认为以不同的亲和力与两个亚单位在核苷酸结合域和C端域之间的裂隙中结合,从而阻止催化界面关闭,这是催化位点循环转化的必要条件。(A3032, A3033, A3034)
Aurovertins are a mixed, noncompetitive inhibitors of both ATP hydrolysis and synthesis. They do this by inhibiting the proton-pumping F1F0-ATP synthase by binding to beta-subunits in its F1 catalytic sector. F1F0-ATP synthase is responsible for the terminal step of oxidative phosphorylation. Each ATP synthase complex has three beta subunits, and aurovertins are believed to bind with varying affinity to two subunits on sites in a cleft between the nucleotide-binding and C-terminal domains, thus preventing closure of the catalytic interfaces necessary for the cyclic interconversion of catalytic sites. (A3032, A3033, A3034)
来源:Toxin and Toxin Target Database (T3DB)