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-Structure paper
タイトル | Cryo-EM structures of human RNA polymerase I. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 28, Issue 12, Page 997-991008, Year 2021 |
掲載日 | 2021年12月9日 |
![]() | Agata D Misiaszek / Mathias Girbig / Helga Grötsch / Florence Baudin / Brice Murciano / Aleix Lafita / Christoph W Müller / ![]() ![]() |
PubMed 要旨 | RNA polymerase I (Pol I) specifically synthesizes ribosomal RNA. Pol I upregulation is linked to cancer, while mutations in the Pol I machinery lead to developmental disorders. Here we report the ...RNA polymerase I (Pol I) specifically synthesizes ribosomal RNA. Pol I upregulation is linked to cancer, while mutations in the Pol I machinery lead to developmental disorders. Here we report the cryo-EM structure of elongating human Pol I at 2.7 Å resolution. In the exit tunnel, we observe a double-stranded RNA helix that may support Pol I processivity. Our structure confirms that human Pol I consists of 13 subunits with only one subunit forming the Pol I stalk. Additionally, the structure of human Pol I in complex with the initiation factor RRN3 at 3.1 Å resolution reveals stalk flipping upon RRN3 binding. We also observe an inactivated state of human Pol I bound to an open DNA scaffold at 3.3 Å resolution. Lastly, the high-resolution structure of human Pol I allows mapping of disease-related mutations that can aid understanding of disease etiology. |
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手法 | EM (単粒子) |
解像度 | 2.7 - 3.3 Å |
構造データ | EMDB-12795, PDB-7ob9: EMDB-12796, PDB-7oba: EMDB-12797, PDB-7obb: |
化合物 | ![]() ChemComp-ZN: ![]() ChemComp-MG: |
由来 |
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![]() | TRANSCRIPTION / RNA polymerase I / human / rRNA transcription / DNA-dependent RNA polymerase / elongation state / pre-initiation / RRN3 / Open Complex |