GNAT toxins evolve toward narrow tRNA target specificities.
GNAT toxins evolve toward narrow tRNA target specificities.
复制标题
DOI:
10.1093/nar/gkac356
复制
发表时间:
2022-06-10
影响因子:
14.9
通讯作者:
Dubiley, Svetlana
中科院分区:
文献类型:
--
作者:
Bikmetov, Dmitry;Hall, Alexander M. J.;Livenskyi, Alexei;Gollan, Bridget;Ovchinnikov, Stepan;Gilep, Konstantin;Kim, Jenny Y.;Larrouy-Maumus, Gerald;Zgoda, Viktor;Borukhov, Sergei;Severinov, Konstantin;Helaine, Sophie;Dubiley, Svetlana
Type II toxin–antitoxin (TA) systems are two-gene modules widely distributed among prokaryotes. GNAT toxins associated with the DUF1778 antitoxins represent a large family of type II TAs. GNAT toxins inhibit cell growth by disrupting translation via acetylation of aminoacyl-tRNAs. In this work, we explored the evolutionary trajectory of GNAT toxins. Using LC/MS detection of acetylated aminoacyl-tRNAs combined with ribosome profiling, we systematically investigated the in vivo substrate specificity of an array of diverse GNAT toxins. Our functional data show that the majority of GNAT toxins are specific to Gly-tRNA isoacceptors. However, the phylogenetic analysis shows that the ancestor of GNAT toxins was likely a relaxed specificity enzyme capable of acetylating multiple elongator tRNAs. Together, our data provide a remarkable snapshot of the evolution of substrate specificity.
登录
查看更多内容
影响因子:
16
作者:
Jankevicius, Gytis;Ariza, Antonio;Ahel, Marijan;Ahel, Ivan
通讯作者:
Ahel, Ivan
DOI:
10.1016/j.bbapap.2015.04.015
发表时间:
2015-08
影响因子:
3.2
作者:
Gerlt, John A.;Bouvier, Jason T.;Davidson, Daniel B.;Imker, Heidi J.;Sadkhin, Boris;Slater, David R.;Whalen, Katie L.
通讯作者:
Whalen, Katie L.
影响因子:
8.8
作者:
Harms, Alexander;Stanger, Frederic Valentin;Dehio, Christoph
通讯作者:
Dehio, Christoph
影响因子:
14.8
作者:
Jurenas, Dukas;Chatterjee, Sneha;Van Melderen, Laurence
通讯作者:
Van Melderen, Laurence
DOI:
10.1073/pnas.0808832106
发表时间:
2009-01-20
影响因子:
11.1
作者:
Fineran, Peter C.;Blower, Tim R.;Salmond, George P. C.
通讯作者:
Salmond, George P. C.