tRNA-splicing ligase complex / 3'-phosphate/5'-hydroxy nucleic acid ligase / RNA ligase (GTP) activity / tRNA splicing, via endonucleolytic cleavage and ligation / embryonic morphogenesis / exonuclease activity / tRNA processing / RNA polymerase II complex binding / negative regulation of protein kinase activity / mitotic spindle ...tRNA-splicing ligase complex / 3'-phosphate/5'-hydroxy nucleic acid ligase / RNA ligase (GTP) activity / tRNA splicing, via endonucleolytic cleavage and ligation / embryonic morphogenesis / exonuclease activity / tRNA processing / RNA polymerase II complex binding / negative regulation of protein kinase activity / mitotic spindle / RNA helicase activity / RNA helicase / centrosome / GTP binding / perinuclear region of cytoplasm / positive regulation of transcription by RNA polymerase II / RNA binding / ATP binding / metal ion binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能
FAM98 / Ashwin / Protein of unknown function (DUF2465) / Developmental protein / RNA transcription, translation and transport factor protein / RNA transcription, translation and transport factor protein / RNA-splicing ligase RtcB homologue, eukaryotic / Uncharacterized protein family UPF0027 signature. / RNA-splicing ligase, RtcB / tRNA-splicing ligase RtcB-like superfamily ...FAM98 / Ashwin / Protein of unknown function (DUF2465) / Developmental protein / RNA transcription, translation and transport factor protein / RNA transcription, translation and transport factor protein / RNA-splicing ligase RtcB homologue, eukaryotic / Uncharacterized protein family UPF0027 signature. / RNA-splicing ligase, RtcB / tRNA-splicing ligase RtcB-like superfamily / tRNA-splicing ligase RtcB / RNA helicase, DEAD-box type, Q motif / DEAD-box RNA helicase Q motif profile. / SPRY domain / B30.2/SPRY domain / B30.2/SPRY domain profile. / B30.2/SPRY domain superfamily / Domain in SPla and the RYanodine Receptor. / SPRY domain / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / Helicase conserved C-terminal domain / helicase superfamily c-terminal domain / Concanavalin A-like lectin/glucanase domain superfamily / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
Family with sequence similarity 98, member B / ATP-dependent RNA helicase / Ashwin / RNA-splicing ligase RtcB homolog / RNA transcription, translation and transport factor protein 類似検索 - 構成要素
ジャーナル: J Biol Chem / 年: 2025 タイトル: Structural and biochemical characterization of the 3'-5' tRNA splicing ligases. 著者: Sebastian Chamera / Weronika Zajko / Mariusz Czarnocki-Cieciura / Marcin Jaciuk / Łukasz Koziej / Jakub Nowak / Krzysztof Wycisk / Małgorzata Sroka / Andrzej Chramiec-Głąbik / Mirosław ...著者: Sebastian Chamera / Weronika Zajko / Mariusz Czarnocki-Cieciura / Marcin Jaciuk / Łukasz Koziej / Jakub Nowak / Krzysztof Wycisk / Małgorzata Sroka / Andrzej Chramiec-Głąbik / Mirosław Śmietański / Filip Gołębiowski / Marcin Warmiński / Jacek Jemielity / Sebastian Glatt / Marcin Nowotny / 要旨: In archaea and metazoa, tRNA exons are ligated by the RNA ligases RtcB and RTCB, respectively. The metazoan RTCB forms a stable complex with four additional subunits, DDX1, FAM98B, CGI99, and ASHWIN. ...In archaea and metazoa, tRNA exons are ligated by the RNA ligases RtcB and RTCB, respectively. The metazoan RTCB forms a stable complex with four additional subunits, DDX1, FAM98B, CGI99, and ASHWIN. The role and assembly of these four components remain elusive. Furthermore, we lack structural information of how RNA substrates are recognized by 3'-5' tRNA ligases. Here, we use thiol-based chemical crosslinking to confirm the involvement of specific residues of RtcB in RNA binding, and we present a cryo-EM structure of the purified five-subunit Danio rerio tRNA ligase complex. The structure implies that the DDX1 helicase module is mobile and can modulate the activity of RTCB. Taken together, the presented results enhance our mechanistic understanding of RNA binding by 3'-5' tRNA splicing ligases and architecture of the metazoan tRNA ligase complex.