Widespread genetic switches and toxicity resistance proteins for fluoride.

Widespread genetic switches and toxicity resistance proteins for fluoride.
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DOI:
10.1126/science.1215063
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发表时间:
2012-01-13
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Breaker RR
Breaker RR
中科院分区:
其他
文献类型:
--
作者:
Baker JL;Sudarsan N;Weinberg Z;Roth A;Stockbridge RB;Breaker RR

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大多数核糖开关是位于细菌信使RNA中的代谢物结合RNA结构,在那里它们控制基因表达。我们已经在许多细菌和古细菌中发现了核糖开关类,其成员选择性地被氟化物触发,但拒绝其他小阴离子,包括氯离子。这些氟化物核糖开关激活编码推定的氟化物转运蛋白、已知被氟化物抑制的酶和功能未知的其他蛋白质的基因的表达。我们的研究结果表明,大多数生物体自然暴露于有毒水平的氟化物,许多物种使用氟化物传感RNA来控制蛋白质的表达,以减轻这种阴离子的有害影响。
Most riboswitches are metabolite-binding RNA structures located in bacterial messenger RNAs where they control gene expression. We have discovered a riboswitch class in many bacterial and archaeal species whose members are selectively triggered by fluoride but reject other small anions, including chloride. These fluoride riboswitches activate expression of genes that encode putative fluoride transporters, enzymes that are known to be inhibited by fluoride, and additional proteins of unknown function. Our findings indicate that most organisms are naturally exposed to toxic levels of fluoride and that many species use fluoride-sensing RNAs to control the expression of proteins that alleviate the deleterious effects of this anion.
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