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-Structure paper
タイトル | Phage-triggered reverse transcription assembles a toxic repetitive gene from a noncoding RNA. |
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ジャーナル・号・ページ | Science, Vol. 386, Issue 6717, Page eadq3977, Year 2024 |
掲載日 | 2024年10月4日 |
著者 | Max E Wilkinson / David Li / Alex Gao / Rhiannon K Macrae / Feng Zhang / |
PubMed 要旨 | Reverse transcription has frequently been co-opted for cellular functions and in prokaryotes is associated with protection against viral infection, but the underlying mechanisms of defense are ...Reverse transcription has frequently been co-opted for cellular functions and in prokaryotes is associated with protection against viral infection, but the underlying mechanisms of defense are generally unknown. Here, we show that in the DRT2 defense system, the reverse transcriptase binds a neighboring pseudoknotted noncoding RNA. Upon bacteriophage infection, a template region of this RNA is reverse transcribed into an array of tandem repeats that reconstitute a promoter and open reading frame, allowing expression of a toxic repetitive protein and an abortive infection response. Biochemical reconstitution of this activity and cryo-electron microscopy provide a molecular basis for repeat synthesis. Gene synthesis from a noncoding RNA is a previously unknown mode of genetic regulation in prokaryotes. |
リンク | Science / PubMed:39208082 |
手法 | EM (単粒子) |
解像度 | 2.91 - 3.17 Å |
構造データ | EMDB-45085, PDB-9c0i: EMDB-45086, PDB-9c0j: |
化合物 | ChemComp-MG: ChemComp-K: ChemComp-TTP: |
由来 |
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キーワード | TRANSFERASE/DNA/RNA / reverse transcriptase / rolling circle amplification / phage defense / TRANSFERASE-DNA-RNA complex |