Prokaryotic viperins produce diverse antiviral molecules.

Prokaryotic viperins produce diverse antiviral molecules.
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DOI:
10.1038/s41586-020-2762-2
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发表时间:
2021-01
期刊:
影响因子:
64.8
通讯作者:
Sorek R
Sorek R
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bernheim A;Millman A;Ofir G;Meitav G;Avraham C;Shomar H;Rosenberg MM;Tal N;Melamed S;Amitai G;Sorek R

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蝰蛇蛋白是一种在动物体内保守的干扰素诱导的细胞蛋白。它被证明可以通过产生一种称为3 '-脱氧-3 '4'-二脱氢-CTP(ddhCTP)的核糖核苷酸来抑制多种病毒的复制,该核苷酸可作为病毒RNA聚合酶的链终止剂。在这里,我们表明,真核蝰蛇蛋白起源于细菌和古细菌的蛋白质,防止噬菌体感染的分支。原蝰蛇蛋白(pVips)产生一组修饰的核糖核苷酸,包括ddhCTP,以及ddhGTP和ddhUTP。我们进一步提供的证据表明,pVips通过抑制病毒聚合酶依赖性转录来防止T7噬菌体感染,这意味着类似于动物蝰蛇蛋白的抗病毒作用机制。我们的研究结果揭示了细菌免疫系统产生的天然抗病毒化合物的潜在储存库。
Viperin is an interferon-induced cellular protein conserved in animals. It was shown to inhibit the replication of multiple viruses by producing a ribonucleotide called 3’-deoxy-3’4’-didehydro-CTP (ddhCTP), which acts as a chain terminator for the viral RNA polymerase. Here we show that the eukaryotic viperin has originated from a clade of bacterial and archaeal proteins that protect against phage infection. Prokaryotic viperins (pVips) produce a set of modified ribonucleotides that include ddhCTP, as well as ddhGTP and ddhUTP. We further provide evidence that pVips protect against T7 phage infection by inhibiting viral polymerase-dependent transcription, implying an anti-viral mechanism of action similar to the animal viperin. Our results unveil a potential repository of natural antiviral compounds produced by bacterial immune systems.
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