Small ribosomal subunit protein uS4A / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein uS11A / Small ribosomal subunit protein eS19A / Small ribosomal subunit protein uS8A / Small ribosomal subunit protein uS12A / Small ribosomal subunit protein eS24A / Small ribosomal subunit protein eS4A / Small ribosomal subunit protein eS6A / Small ribosomal subunit protein eS8A ...Small ribosomal subunit protein uS4A / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein uS11A / Small ribosomal subunit protein eS19A / Small ribosomal subunit protein uS8A / Small ribosomal subunit protein uS12A / Small ribosomal subunit protein eS24A / Small ribosomal subunit protein eS4A / Small ribosomal subunit protein eS6A / Small ribosomal subunit protein eS8A / Small ribosomal subunit protein uS17A / Small ribosomal subunit protein uS9A / Small ribosomal subunit protein uS13A / Ribosomal RNA-processing protein 7 / Periodic tryptophan protein 2 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein eS7A / U3 small nucleolar ribonucleoprotein protein IMP3 / Small ribosomal subunit protein eS1A / Small ribosomal subunit protein eS27A / Essential nuclear protein 1 / Dimethyladenosine transferase / U3 small nucleolar RNA-associated protein MPP10 / U3 small nucleolar RNA-associated protein 22 / U3 small nucleolar ribonucleoprotein protein IMP4 / Probable ATP-dependent RNA helicase DHR1 / U3 small nucleolar RNA-associated protein 13 / U3 small nucleolar RNA-associated protein 21 / Ribosomal RNA small subunit methyltransferase NEP1 / Nucleolar complex protein 4 / rRNA processing protein RCL1 / Ribosome biogenesis protein BMS1 / Something about silencing protein 10 / U3 small nucleolar RNA-associated protein 12 / Small ribosomal subunit protein eS25A / Small ribosomal subunit protein eS28A / Nucleolar complex protein 14 / Pre-rRNA-processing protein PNO1 類似検索 - 構成要素
ジャーナル: Science / 年: 2020 タイトル: 90 pre-ribosome transformation into the primordial 40 subunit. 著者: Jingdong Cheng / Benjamin Lau / Giuseppe La Venuta / Michael Ameismeier / Otto Berninghausen / Ed Hurt / Roland Beckmann / 要旨: Production of small ribosomal subunits initially requires the formation of a 90 precursor followed by an enigmatic process of restructuring into the primordial pre-40 subunit. We elucidate this ...Production of small ribosomal subunits initially requires the formation of a 90 precursor followed by an enigmatic process of restructuring into the primordial pre-40 subunit. We elucidate this process by biochemical and cryo-electron microscopy analysis of intermediates along this pathway in yeast. First, the remodeling RNA helicase Dhr1 engages the 90 pre-ribosome, followed by Utp24 endonuclease-driven RNA cleavage at site A, thereby separating the 5'-external transcribed spacer (ETS) from 18 ribosomal RNA. Next, the 5'-ETS and 90 assembly factors become dislodged, but this occurs sequentially, not en bloc. Eventually, the primordial pre-40 emerges, still retaining some 90 factors including Dhr1, now ready to unwind the final small nucleolar U3-18 RNA hybrid. Our data shed light on the elusive 90 to pre-40 transition and clarify the principles of assembly and remodeling of large ribonucleoproteins.