exoribonuclease II / exoribonuclease II activity / miRNA catabolic process / mRNA catabolic process / P-body / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 3'-5'-RNA exonuclease activity ...exoribonuclease II / exoribonuclease II activity / miRNA catabolic process / mRNA catabolic process / P-body / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 3'-5'-RNA exonuclease activity / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / mRNA binding / RNA binding / zinc ion binding / cytoplasm / cytosol 類似検索 - 分子機能
RNase II/RNase R, cold shock domain / Ribonuclease B, N-terminal OB domain / Ribonuclease B OB domain / Cold shock domain / Ribonuclease R / Ribonuclease II/ribonuclease R / Ribonuclease II/R, conserved site / Ribonuclease II family signature. / Ribonuclease II/R / RNB domain ...RNase II/RNase R, cold shock domain / Ribonuclease B, N-terminal OB domain / Ribonuclease B OB domain / Cold shock domain / Ribonuclease R / Ribonuclease II/ribonuclease R / Ribonuclease II/R, conserved site / Ribonuclease II family signature. / Ribonuclease II/R / RNB domain / RNB / Cold shock domain / Cold shock protein domain / S1 domain profile. / Ribosomal protein S14, type Z / Ribosomal protein S1-like RNA-binding domain / S1 RNA binding domain / S1 domain / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S14/S29 / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S9, bacterial/plastid / Ribosomal protein S4, bacterial-type / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein S2, bacteria/mitochondria/plastid / Ribosomal protein S18, conserved site / Ribosomal protein S18 signature. / Ribosomal protein S16 / Ribosomal protein S16 / Ribosomal protein S16 domain superfamily / Ribosomal protein S15, bacterial-type / Ribosomal protein S6 / Ribosomal protein S6 / Ribosomal protein S6 superfamily / Ribosomal protein S2 signature 2. / Ribosomal protein S12, bacterial-type / Translation elongation factor EF1B/ribosomal protein S6 / Ribosomal protein S18 / Ribosomal protein S18 / Ribosomal protein S18 superfamily / K Homology domain / K homology RNA-binding domain / Ribosomal protein S3, conserved site / Ribosomal protein S3 signature. / Ribosomal protein S10, conserved site / Ribosomal protein S10 signature. / Ribosomal protein S14, conserved site / Ribosomal protein S14 signature. / Ribosomal protein S2 signature 1. / KH domain / Type-2 KH domain profile. / K Homology domain, type 2 / : / Ribosomal protein S3, C-terminal / Ribosomal protein S3, C-terminal domain / Ribosomal protein S3, C-terminal domain superfamily / Ribosomal protein S15/S19, conserved site / Ribosomal protein S19 signature. / Ribosomal protein S10 / Ribosomal protein S19/S15 / Ribosomal protein S19/S15, superfamily / Ribosomal protein S19 / Ribosomal protein S2, conserved site / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S7, conserved site / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S7 signature. / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / K homology domain superfamily, prokaryotic type / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5 / Ribosomal protein S5, N-terminal / Ribosomal protein S5, N-terminal domain / Ribosomal protein S5, C-terminal / Ribosomal protein S13, conserved site / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S13 signature. / Ribosomal protein S5, C-terminal domain / Ribosomal protein S13 / 30s ribosomal protein S13, C-terminal / Ribosomal protein S13/S18 / Ribosomal protein S13 family profile. / Ribosomal protein S8 signature. / Ribosomal protein S4/S9 N-terminal domain 類似検索 - ドメイン・相同性
Ribonuclease R / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS14B / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 ...Ribonuclease R / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS14B / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein bS20 類似検索 - 構成要素
ジャーナル: Nature / 年: 2024 タイトル: Structural basis of ribosomal 30S subunit degradation by RNase R. 著者: Lyudmila Dimitrova-Paternoga / Sergo Kasvandik / Bertrand Beckert / Sander Granneman / Tanel Tenson / Daniel N Wilson / Helge Paternoga / 要旨: Protein synthesis is a major energy-consuming process of the cell that requires the controlled production and turnover of ribosomes. Although the past few years have seen major advances in our ...Protein synthesis is a major energy-consuming process of the cell that requires the controlled production and turnover of ribosomes. Although the past few years have seen major advances in our understanding of ribosome biogenesis, structural insight into the degradation of ribosomes has been lacking. Here we present native structures of two distinct small ribosomal 30S subunit degradation intermediates associated with the 3' to 5' exonuclease ribonuclease R (RNase R). The structures reveal that RNase R binds at first to the 30S platform to facilitate the degradation of the functionally important anti-Shine-Dalgarno sequence and the decoding-site helix 44. RNase R then encounters a roadblock when it reaches the neck region of the 30S subunit, and this is overcome by a major structural rearrangement of the 30S head, involving the loss of ribosomal proteins. RNase R parallels this movement and relocates to the decoding site by using its N-terminal helix-turn-helix domain as an anchor. In vitro degradation assays suggest that head rearrangement poses a major kinetic barrier for RNase R, but also indicate that the enzyme alone is sufficient for complete degradation of 30S subunits. Collectively, our results provide a mechanistic basis for the degradation of 30S mediated by RNase R, and reveal that RNase R targets orphaned 30S subunits using a dynamic mechanism involving an anchored switching of binding sites.