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-Structure paper
タイトル | Structural insights into coordinating 5S RNP rotation with ITS2 pre-RNA processing during ribosome formation. |
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ジャーナル・号・ページ | EMBO Rep, Vol. 24, Issue 12, Page e57984, Year 2023 |
掲載日 | 2023年12月6日 |
著者 | Matthias Thoms / Benjamin Lau / Jingdong Cheng / Lisa Fromm / Timo Denk / Nikola Kellner / Dirk Flemming / Paulina Fischer / Laurent Falquet / Otto Berninghausen / Roland Beckmann / Ed Hurt / |
PubMed 要旨 | The rixosome defined in Schizosaccharomyces pombe and humans performs diverse roles in pre-ribosomal RNA processing and gene silencing. Here, we isolate and describe the conserved rixosome from ...The rixosome defined in Schizosaccharomyces pombe and humans performs diverse roles in pre-ribosomal RNA processing and gene silencing. Here, we isolate and describe the conserved rixosome from Chaetomium thermophilum, which consists of two sub-modules, the sphere-like Rix1-Ipi3-Ipi1 and the butterfly-like Las1-Grc3 complex, connected by a flexible linker. The Rix1 complex of the rixosome utilizes Sda1 as landing platform on nucleoplasmic pre-60S particles to wedge between the 5S rRNA tip and L1-stalk, thereby facilitating the 180° rotation of the immature 5S RNP towards its mature conformation. Upon rixosome positioning, the other sub-module with Las1 endonuclease and Grc3 polynucleotide-kinase can reach a strategic position at the pre-60S foot to cleave and 5' phosphorylate the nearby ITS2 pre-rRNA. Finally, inward movement of the L1 stalk permits the flexible Nop53 N-terminus with its AIM motif to become positioned at the base of the L1-stalk to facilitate Mtr4 helicase-exosome participation for completing ITS2 removal. Thus, the rixosome structure elucidates the coordination of two central ribosome biogenesis events, but its role in gene silencing may adapt similar strategies. |
リンク | EMBO Rep / PubMed:37921038 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.12 - 10.02 Å |
構造データ | EMDB-17879, PDB-8ptw: EMDB-17880: Chaetomium thermophilum low-resolution Rixosome EMDB-17881: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - local refinement - 5S RNP/Rsa4-E117D EMDB-17882: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - local refinement - Foot EMDB-17883: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - local refinement - H68/H69 EMDB-17884: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - local refinement - Mrt4/uL11 EMDB-17885: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - local refinement - UTP30-ITS2 EMDB-17886: Chaetomium thermophilum pre-60S State 1 - pre-5S rotation (Arx1/Nog2 state) - consensus refinement EMDB-17887: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - local refinement - 5S RNP/Rsa4-E117D EMDB-17888: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - local refinement - Foot EMDB-17889: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - local refinement - uL1 stalk EMDB-17890: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - local refinement - Sda1-Ipi1 EMDB-17891: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - local refinement - (Rix1)2-(Ipi3)2 EMDB-17892: Chaetomium thermophilum pre-60S State 2 - pre-5S rotation with Rix1 complex - consensus refinement EMDB-17893: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - local refinement - CP EMDB-17894: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - local refinement - uL1 stalk EMDB-17895: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - local refinement - (Rix1)2-(Ipi3)2 EMDB-17896: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - local refinement - Foot EMDB-17897: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - local refinement - uL1-Nop53N EMDB-17898: Chaetomium thermophilum pre-60S State 3 - post-5S rotation with Rix1 complex with Foot - consensus refinement EMDB-17899: Chaetomium thermophilum pre-60S State 4 - post-5S rotation with Rix1 complex without Foot - local refinement - CP EMDB-17900: Chaetomium thermophilum pre-60S State 4 - post-5S rotation with Rix1 complex without Foot - local refinement - uL1 stalk EMDB-17901: Chaetomium thermophilum pre-60S State 4 - post-5S rotation with Rix1 complex without Foot - local refinement - (Rix1)2-(Ipi3)2 EMDB-17902: Chaetomium thermophilum pre-60S State 4 - post-5S rotation with Rix1 complex without Foot - consensus refinement EMDB-17903: Chaetomium thermophilum pre-60S State 5 - pre-5S rotation - L1 inward - local refinement - 5S RNP/Rsa4-E117D EMDB-17904: Chaetomium thermophilum pre-60S State 5 - pre-5S rotation - L1 inward - local refinement - uL1-Nop53N EMDB-17905: Chaetomium thermophilum pre-60S State 5 - pre-5S rotation - L1 inward - local refinement - Foot EMDB-17906: Chaetomium thermophilum pre-60S State 5 - pre-5S rotation - L1 inward - local refinement - uL1-5S-tip EMDB-17907: Chaetomium thermophilum pre-60S State 5 - pre-5S rotation - L1 inward - consensus refinement EMDB-17908: Chaetomium thermophilum pre-60S State 6 - pre-5S rotation - L1 intermediate - local refinement - 5S RNP/Rsa4-E117D EMDB-17909: Chaetomium thermophilum pre-60S State 6 - pre-5S rotation - L1 intermediate - local refinement - Foot EMDB-17910: Chaetomium thermophilum pre-60S State 6 - pre-5S rotation - L1 intermediate - consensus refinement EMDB-17911: Chaetomium thermophilum pre-60S State 7 - pre-5S rotation lacking Utp30/ITS2 - local refinement - 5S RNP/Rsa4-E117D EMDB-17912: Chaetomium thermophilum pre-60S State 7 - pre-5S rotation lacking Utp30/ITS2 - local refinement - Foot EMDB-17913: Chaetomium thermophilum pre-60S State 7 - pre-5S rotation lacking Utp30/ITS2 - consensus refinement EMDB-17914: Chaetomium thermophilum pre-60S State 8 - pre-5S rotation without Foot - local refinement - 5S RNP/Rsa4-E117D EMDB-17915: Chaetomium thermophilum pre-60S State 8 - pre-5S rotation without Foot - consensus refinement EMDB-17916: Chaetomium thermophilum pre-60S State 9 - pre-5S rotation - immature H68/H69 - local refinement - 5S RNP/Rsa4-E117D EMDB-17917: Chaetomium thermophilum pre-60S State 9 - pre-5S rotation - immature H68/H69 - local refinement - Foot EMDB-17918: Chaetomium thermophilum pre-60S State 9 - pre-5S rotation - immature H68/H69 - consensus refinement EMDB-17919: Chaetomium thermophilum pre-60S State 10 - pre-5S rotation with Ytm1-Erb1 - local refinement - 5S RNP/Rsa4-E117D EMDB-17920: Chaetomium thermophilum pre-60S State 10 - pre-5S rotation with Ytm1-Erb1 - local refinement - Foot EMDB-17921: Chaetomium thermophilum pre-60S State 10 - pre-5S rotation with Ytm1-Erb1 - local refinement - Ytm1-Erb1 EMDB-17922: Chaetomium thermophilum pre-60S State 10 - pre-5S rotation with Ytm1-Erb1 - consensus refinement EMDB-17923: Chaetomium thermophilum Rix1-complex - (Rix1)2-(Ipi3)2-Ipi1 EMDB-17949, PDB-8puw: EMDB-17950, PDB-8pv1: EMDB-17951, PDB-8pv2: EMDB-17952, PDB-8pv3: EMDB-17953, PDB-8pv4: EMDB-17954, PDB-8pv5: EMDB-17955, PDB-8pv6: EMDB-17956, PDB-8pv7: EMDB-17957, PDB-8pv8: EMDB-17969, PDB-8pvk: EMDB-17970, PDB-8pvl: |
化合物 | ChemComp-GTP: ChemComp-MG: ChemComp-ZN: ChemComp-HOH: |
由来 |
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キーワード | RIBOSOME / biogenesis / pre-60S / 5S RNP |