Japan Agency for Medical Research and Development (AMED)
JP21am0101071
日本
Japan Agency for Medical Research and Development (AMED)
JP21am0101091
日本
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: Structural basis of transfer RNA processing by bacterial minimal RNase P. 著者: Takamasa Teramoto / Takeshi Koyasu / Takashi Yokogawa / Naruhiko Adachi / Kouta Mayanagi / Takahiro Nakamura / Toshiya Senda / Yoshimitsu Kakuta / 要旨: Precursor tRNAs (pre-tRNAs) require nucleolytic removal of 5'-leader and 3'-trailer sequences for maturation, which is essential for proper tRNA function. The endoribonuclease RNase P exists in ...Precursor tRNAs (pre-tRNAs) require nucleolytic removal of 5'-leader and 3'-trailer sequences for maturation, which is essential for proper tRNA function. The endoribonuclease RNase P exists in diverse forms, including RNA- and protein-based RNase P, and removes 5'-leader sequences from pre-tRNAs. Some bacteria and archaea possess a unique minimal protein-based RNase P enzyme, HARP, which forms dodecamers with twelve active sites. Here, we present cryogenic electron microscopy structures of HARP dodecamers complexed with five pre-tRNAs, and we show that HARP oligomerization enables specific recognition of the invariant distance between the acceptor stem 5'-end and the TψC-loop, functioning as a molecular ruler-a feature representing convergent evolution among RNase P enzymes. The HARP dodecamer uses only five active sites for 5'-leader cleavage, while we identify a 3'-trailer cleavage activity in the remaining seven sites. This elucidation reveals how small proteins evolve through oligomerization to adapt a pivotal biological function (5'-leader processing) and acquire a novel function (3'-trailer processing).
履歴
登録
2023年8月9日
登録サイト: PDBJ / 処理サイト: PDBJ
改定 1.0
2024年8月14日
Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: Mask / Data content type: Mask / Provider: repository / タイプ: Initial release
改定 1.0
2024年8月14日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / カテゴリ: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name