National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
RO1AI101057
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01AI152408
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM071940
米国
引用
ジャーナル: Science / 年: 2023 タイトル: Structural basis of gRNA stabilization and mRNA recognition in trypanosomal RNA editing. 著者: Shiheng Liu / Hong Wang / Xiaorun Li / Fan Zhang / Jane K J Lee / Zihang Li / Clinton Yu / Jason J Hu / Xiaojing Zhao / Takuma Suematsu / Ana L Alvarez-Cabrera / Qiushi Liu / Liye Zhang / Lan ...著者: Shiheng Liu / Hong Wang / Xiaorun Li / Fan Zhang / Jane K J Lee / Zihang Li / Clinton Yu / Jason J Hu / Xiaojing Zhao / Takuma Suematsu / Ana L Alvarez-Cabrera / Qiushi Liu / Liye Zhang / Lan Huang / Inna Aphasizheva / Ruslan Aphasizhev / Z Hong Zhou / 要旨: In , the editosome, composed of RNA-editing substrate-binding complex (RESC) and RNA-editing catalytic complex (RECC), orchestrates guide RNA (gRNA)-programmed editing to recode cryptic mitochondrial ...In , the editosome, composed of RNA-editing substrate-binding complex (RESC) and RNA-editing catalytic complex (RECC), orchestrates guide RNA (gRNA)-programmed editing to recode cryptic mitochondrial transcripts into messenger RNAs (mRNAs). The mechanism of information transfer from gRNA to mRNA is unclear owing to a lack of high-resolution structures for these complexes. With cryo-electron microscopy and functional studies, we have captured gRNA-stabilizing RESC-A and gRNA-mRNA-binding RESC-B and RESC-C particles. RESC-A sequesters gRNA termini, thus promoting hairpin formation and blocking mRNA access. The conversion of RESC-A into RESC-B or -C unfolds gRNA and allows mRNA selection. The ensuing gRNA-mRNA duplex protrudes from RESC-B, likely exposing editing sites to RECC-catalyzed cleavage, uridine insertion or deletion, and ligation. Our work reveals a remodeling event facilitating gRNA-mRNA hybridization and assembly of a macromolecular substrate for the editosome's catalytic modality.
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 10 (RESC10)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 11 (RESC11)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 13 (RESC13)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 14 (RESC14)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 5 (RESC5)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 6 (RESC6)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 7 (RESC7)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 8 (RESC8)
タンパク質・ペプチド: RNA-editing substrate-binding complex protein 9 (RESC9)
RNA: gRNA
RNA: mRNA
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超分子 #1: RESC5-tagged isolate without RNase treatment
超分子
名称: RESC5-tagged isolate without RNase treatment / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #8-#11, #3-#7, #2, #1 詳細: CTS-tagged RESC5 purified from RNase-untreated mitochondrial extract by tandem affinity procedure
由来(天然)
生物種: Trypanosoma brucei (トリパノソーマ)
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分子 #1: mRNA
分子
名称: mRNA / タイプ: rna / ID: 1 / コピー数: 1
由来(天然)
生物種: Trypanosoma brucei (トリパノソーマ)
分子量
理論値: 15.963094 KDa
配列
文字列:
UAUAUAAUAG AAUAAGAUAA GUUUUUUUUU UUUUUUUUUU UUUUUUUUUU U
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分子 #2: gRNA
分子
名称: gRNA / タイプ: rna / ID: 2 / コピー数: 1
由来(天然)
生物種: Trypanosoma brucei (トリパノソーマ)
分子量
理論値: 13.742247 KDa
配列
文字列:
AAAAAAAAAA AAAAAAAAAA AAAAAAAUUU UUUUUUUUUU UUU
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分子 #3: RNA-editing substrate-binding complex protein 5 (RESC5)
分子
名称: RNA-editing substrate-binding complex protein 5 (RESC5) タイプ: protein_or_peptide / ID: 3 詳細: RESC5 is tagged in situ in Trypanosoma brucei (5691), which shared the same native environment as other RESC proteins. コピー数: 1 / 光学異性体: LEVO