intron homing / intein-mediated protein splicing / ribonuclease P activity / tRNA 5'-leader removal / 90S preribosome / translation initiation factor activity / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / positive regulation of apoptotic signaling pathway / ribosomal small subunit biogenesis ...intron homing / intein-mediated protein splicing / ribonuclease P activity / tRNA 5'-leader removal / 90S preribosome / translation initiation factor activity / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / positive regulation of apoptotic signaling pathway / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit rRNA binding / リボソーム生合成 / small ribosomal subunit / cytosolic small ribosomal subunit / endonuclease activity / cytoplasmic translation / tRNA binding / rRNA binding / リボソーム / structural constituent of ribosome / ribonucleoprotein complex / 翻訳 (生物学) / GTPase activity / mRNA binding / GTP binding / RNA binding / zinc ion binding / 細胞質基質 / 細胞質 類似検索 - 分子機能
Translation initiation factor aIF-2, archaea / Small zinc finger protein HVO_2753-like, zinc-binding pocket / Small zinc finger protein HVO_2753-like / Small zinc finger protein HVO_2753-like, Zn-binding pocket / Ribosomal protein S27ae / Elongation factor Tu-type domain / Elongation factor Tu domain 4 / : / Ribosomal protein S9, archaeal / Ribosomal protein S13, archaeal ...Translation initiation factor aIF-2, archaea / Small zinc finger protein HVO_2753-like, zinc-binding pocket / Small zinc finger protein HVO_2753-like / Small zinc finger protein HVO_2753-like, Zn-binding pocket / Ribosomal protein S27ae / Elongation factor Tu-type domain / Elongation factor Tu domain 4 / : / Ribosomal protein S9, archaeal / Ribosomal protein S13, archaeal / Ribosomal protein S17, archaeal / Ribosomal protein S6e, archaeal / Ribosomal protein S4, archaeal / Ribosomal protein S12, archaea / Ribosomal protein S3, archaeal / 30S ribosomal protein S3Ae / Ribosomal protein S7, archaeal / Ribosomal protein S19e, archaeal / Ribosomal protein S11, archaeal / Ribosomal protein S2, archaeal / Ribosomal protein S14, type Z, archaeal / Ribosomal protein S8e, archaeal / Translation initiation factor 1A (eIF-1A), conserved site / Eukaryotic initiation factor 1A signature. / eukaryotic translation initiation factor 1A / Translation initiation factor 1A (eIF-1A) / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / Translation initiation factor IF- 2 / Translation initiation factor IF-2, domain 3 superfamily / Intein splicing domain / RNA-binding domain, S1, IF1 type / Translation initiation factor 1A / IF-1 / S1 domain IF1 type profile. / Intein DOD homing endonuclease / Intein DOD-type homing endonuclease domain profile. / Ribosomal protein L7Ae, archaea / Intein C-terminal splicing region / Intein C-terminal splicing motif profile. / Hint domain C-terminal / Hint (Hedgehog/Intein) domain C-terminal region / Intein N-terminal splicing region / Intein N-terminal splicing motif profile. / Hint domain N-terminal / Hint (Hedgehog/Intein) domain N-terminal region / Homing endonuclease / Hint domain superfamily / Ribosomal protein S19e, conserved site / Ribosomal protein S2, eukaryotic/archaeal / Ribosomal protein S19e / Ribosomal_S19e / Ribosomal protein S5, eukaryotic/archaeal / Ribosomal protein S8e, conserved site / Ribosomal protein S4e, N-terminal, conserved site / Ribosomal protein S19e signature. / Ribosomal protein S19e / Ribosomal protein S4e, N-terminal / Ribosomal protein S23, eukaryotic/archaeal / Ribosomal protein S10, eukaryotic/archaeal / Ribosomal protein S8e / Ribosomal protein S4, KOW domain / Ribosomal protein S4e / Ribosomal protein S4e, central region / Ribosomal protein S4e, central domain superfamily / RS4NT (NUC023) domain / Ribosomal protein S17e, conserved site / Ribosomal protein S17e signature. / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S27a / 40S ribosomal protein S29/30S ribosomal protein S14 type Z / Ribosomal family S4e / Ribosomal protein S3, eukaryotic/archaeal / Ribosomal protein S3Ae, conserved site / Ribosomal protein S3Ae signature. / Ribosomal protein S27e signature. / Ribosomal protein S4e signature. / Ribosomal protein S19A/S15e / Ribosomal protein S8e signature. / Ribosomal protein S17e / Ribosomal protein S17e-like superfamily / Ribosomal S17 / Ribosomal S24e conserved site / Ribosomal protein S24e signature. / Translation elongation factor EFTu-like, domain 2 / Ribosomal protein S27, zinc-binding domain superfamily / Ribosomal protein S24e / Ribosomal protein S24e / Ribosomal protein S6/S6e/A/B/2, conserved site / Ribosomal protein S6e signature. / Ribosomal protein S27 / Ribosomal protein S27 / Ribosomal protein S17, archaeal/eukaryotic / Ribosomal protein S3Ae / Ribosomal protein S28e conserved site / Ribosomal S3Ae family / Ribosomal protein S28e signature. / Ribosomal S3Ae family / Ribosomal protein S28e / Ribosomal protein S28e 類似検索 - ドメイン・相同性
Zn-ribbon RNA-binding protein involved in translation / Small ribosomal subunit protein eS28 / Small ribosomal subunit protein eS31 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS12 / Large ribosomal subunit protein eL8 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein eS32 / Small ribosomal subunit protein eS27 ...Zn-ribbon RNA-binding protein involved in translation / Small ribosomal subunit protein eS28 / Small ribosomal subunit protein eS31 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS12 / Large ribosomal subunit protein eL8 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein eS32 / Small ribosomal subunit protein eS27 / Small ribosomal subunit protein eS24 / Small ribosomal subunit protein eS6 / Probable translation initiation factor IF-2 / Small ribosomal subunit protein eS8 / Small ribosomal subunit protein eS17 / Small ribosomal subunit protein eS19 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS7 / Translation initiation factor 1A / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein eS4 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein eS1 / Small ribosomal subunit protein uS15 類似検索 - 構成要素
ジャーナル: Nucleic Acids Res / 年: 2022 タイトル: Role of aIF5B in archaeal translation initiation. 著者: Ramy Kazan / Gabrielle Bourgeois / Christine Lazennec-Schurdevin / Eric Larquet / Yves Mechulam / Pierre-Damien Coureux / Emmanuelle Schmitt / 要旨: In eukaryotes and in archaea late steps of translation initiation involve the two initiation factors e/aIF5B and e/aIF1A. In eukaryotes, the role of eIF5B in ribosomal subunit joining is established ...In eukaryotes and in archaea late steps of translation initiation involve the two initiation factors e/aIF5B and e/aIF1A. In eukaryotes, the role of eIF5B in ribosomal subunit joining is established and structural data showing eIF5B bound to the full ribosome were obtained. To achieve its function, eIF5B collaborates with eIF1A. However, structural data illustrating how these two factors interact on the small ribosomal subunit have long been awaited. The role of the archaeal counterparts, aIF5B and aIF1A, remains to be extensively addressed. Here, we study the late steps of Pyrococcus abyssi translation initiation. Using in vitro reconstituted initiation complexes and light scattering, we show that aIF5B bound to GTP accelerates subunit joining without the need for GTP hydrolysis. We report the crystallographic structures of aIF5B bound to GDP and GTP and analyze domain movements associated to these two nucleotide states. Finally, we present the cryo-EM structure of an initiation complex containing 30S bound to mRNA, Met-tRNAiMet, aIF5B and aIF1A at 2.7 Å resolution. Structural data shows how archaeal 5B and 1A factors cooperate to induce a conformation of the initiator tRNA favorable to subunit joining. Archaeal and eukaryotic features of late steps of translation initiation are discussed.