Gonadotropin-releasing hormone / Gonadoliberin / Gonadotropin-releasing hormone / Gonadotropin-releasing hormones signature. / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Coiled-coil-helix-coiled-coil-helix domain-containing protein 1 / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 ...Gonadotropin-releasing hormone / Gonadoliberin / Gonadotropin-releasing hormone / Gonadotropin-releasing hormones signature. / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Coiled-coil-helix-coiled-coil-helix domain-containing protein 1 / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / : / Elongation factor G domain 2 / Translation initiation factor IF- 2 / Translation initiation factor IF-2, domain 3 superfamily / Cysteine alpha-hairpin motif superfamily / Ribosomal protein S22, mitochondrial / Ribosomal protein S23, mitochondrial / Ribosomal protein S23/S25, mitochondrial / : / Mitochondrial 28S ribosomal protein S22 / Mitochondrial ribosomal protein S23 / Ribosomal protein S29, mitochondrial / Ribosomal protein S28, mitochondrial / Mitochondrial 28S ribosomal protein S34 / 28S ribosomal protein S10, mitochondrial / Mitochondrial ribosomal protein MRP-S35 / Mitochondrial 28S ribosomal protein S34 / 28S ribosomal protein S24, mitochondrial / Pentatricopeptide repeat domain-containing protein 3 / 28S ribosomal protein S17, mitochondrial / 28S ribosomal protein S18b, mitochondrial / : / : / Mitochondrial ribosome subunit S24 / Small ribosomal subunit protein uS5m, N-terminal / Small ribosomal subunit protein mS39, PPR / : / 28S ribosomal protein S25, mitochondrial / Ribosomal protein L55, mitochondrial / Mitochondrial ribosomal protein L55 superfamily / Mitochondrial ribosomal protein L55 / Pentatricopeptide repeat domain / Mitochondrial ribosomal protein L48 / 39S ribosomal protein L40, mitochondrial / Ribosomal protein S27/S33, mitochondrial / Ribosomal protein S24/S35, mitochondrial / Mitochondrial ribosomal subunit S27 / 39S ribosomal protein L42, mitochondrial / Mitochondrial 28S ribosomal protein S32 / Ribosomal protein L37, mitochondrial / Ribosomal protein L28/L40, mitochondrial / Mitochondrial ribosomal protein L37 / Mitochondrial ribosomal protein L28 / Ribosomal protein 63, mitochondrial / Growth arrest/ DNA-damage-inducible protein-interacting protein 1 / Ribosomal protein L35, mitochondrial / Ribosomal protein L51, mitochondrial / Growth arrest and DNA-damage-inducible proteins-interacting protein 1 / Mitochondrial ribosomal subunit / Mitochondrial ribosome protein 63 / Ribosomal protein L37/S30 / Ribosomal protein S24/S35, mitochondrial, conserved domain / Growth arrest and DNA damage-inducible proteins-interacting protein 1 domain superfamily / : / : / Mitochondrial 28S ribosomal protein S30 (PDCD9) / Mitochondrial ribosomal subunit protein / Ribosomal protein L7/L12, oligomerisation / 39S ribosomal protein L52, mitochondrial / Ribosomal protein L7/L12, oligomerisation domain superfamily / Ribosomal protein L7/L12 dimerisation domain / Mitoribosomal protein mL52 / : / Ribosomal protein L7/L12 / Ribosomal protein L7/L12, C-terminal / MRPL44, double-stranded RNA binding domain / : / Ribosomal protein L7/L12 C-terminal domain / MRPL44 dsRNA-binding domain / Large ribosomal subunit protein mL44, endonuclease domain / : / Large ribosomal subunit protein bL9m C-terminal domain / Tim44-like domain / Tim44-like domain / Tim44 / : / : / Mitochondrial ribosomal protein L46 NUDIX / Ribosomal protein S23/S29, mitochondrial / Mitochondrial ribosomal death-associated protein 3 / Ribosomal protein L46, N-terminal / 39S mitochondrial ribosomal protein L46 / Ribosomal protein L50, mitochondria / Ribosomal subunit 39S / Pentatricopeptide repeat / Ribosomal protein L49/IMG2 / Mitochondrial large subunit ribosomal protein (Img2) / Mitochondrial mRNA-processing protein COX24, C-terminal / Ribosomal protein L27/L41, mitochondrial / : 類似検索 - ドメイン・相同性
Small ribosomal subunit protein uS12m / 28S ribosomal protein S14, mitochondrial / 28S ribosomal protein S18c, mitochondrial isoform 1 / Small ribosomal subunit protein mS25 / 28S ribosomal protein S28, mitochondrial / Large ribosomal subunit protein mL49 / Large ribosomal subunit protein uL3m / 28S ribosomal protein S7, mitochondrial / Mitochondrial ribosomal protein S11 / Large ribosomal subunit protein mL62 ...Small ribosomal subunit protein uS12m / 28S ribosomal protein S14, mitochondrial / 28S ribosomal protein S18c, mitochondrial isoform 1 / Small ribosomal subunit protein mS25 / 28S ribosomal protein S28, mitochondrial / Large ribosomal subunit protein mL49 / Large ribosomal subunit protein uL3m / 28S ribosomal protein S7, mitochondrial / Mitochondrial ribosomal protein S11 / Large ribosomal subunit protein mL62 / 28S ribosomal protein S21, mitochondrial / Mitochondrial ribosomal protein L18 / Large ribosomal subunit protein mL40 / Large ribosomal subunit protein bL28m / 39S ribosomal protein L20, mitochondrial isoform 1 / Large ribosomal subunit protein bL33m / Large ribosomal subunit protein mL64 / 39S ribosomal protein L23, mitochondrial / Large ribosomal subunit protein bL34m / Ribosomal protein / Mitochondrial ribosomal protein S23 / 28S ribosomal protein S24, mitochondrial / Mitochondrial ribosomal protein S22 / Mitochondrial ribosomal protein L12 / Mitochondrial ribosomal protein L41 / Progonadoliberin / Small ribosomal subunit protein mS38 / Large ribosomal subunit protein uL4m / Large ribosomal subunit protein mL51 / Large ribosomal subunit protein mL37 / Small ribosomal subunit protein uS15m / Large ribosomal subunit protein uL14m / Mitochondrial ribosomal protein L57 / Large ribosomal subunit protein mL42 / 39S ribosomal protein L48, mitochondrial / Uncharacterized protein / Large ribosomal subunit protein uL24m / Large ribosomal subunit protein uL16m / Uncharacterized protein / Large ribosomal subunit protein bL17m / Large ribosomal subunit protein uL22m / Large ribosomal subunit protein uL14m / Mitochondrial ribosomal protein S18A / Mitochondrial ribosomal protein L2 / 39S ribosomal protein L15, mitochondrial / 39S ribosomal protein L27, mitochondrial / Large ribosomal subunit protein uL11m / Small ribosomal subunit protein uS10m / Large ribosomal subunit protein mL38 / Large ribosomal subunit protein uL10m / Large ribosomal subunit protein bL21m / 28S ribosomal protein S2, mitochondrial / Mitochondrial ribosomal protein L4 / Small ribosomal subunit protein mS33 / Large ribosomal subunit protein mL43 / Large ribosomal subunit protein mL52 / 28S ribosomal protein S35, mitochondrial isoform 1 / Large ribosomal subunit protein uL29m / Mitochondrial ribosomal protein L39 / Large ribosomal subunit protein mL44 / Large ribosomal subunit protein mL46 / Large ribosomal subunit protein uL30m / Coiled-coil-helix-coiled-coil-helix domain containing 1 / Small ribosomal subunit protein uS5m / 39S ribosomal protein L48, mitochondrial / Large ribosomal subunit protein bL35m / Large ribosomal subunit protein mL50 / Mitochondrial ribosomal protein L55 / Mitochondrial ribosomal protein S6 / Large ribosomal subunit protein mL45 / Large ribosomal subunit protein mL54 / Large ribosomal subunit protein bL19m / Large ribosomal subunit protein bL9m / Small ribosomal subunit protein mS29 / Large ribosomal subunit protein bL32m / 28S ribosomal protein S9, mitochondrial / Small ribosomal subunit protein mS39 / 39S ribosomal protein L13, mitochondrial / Translation initiation factor IF-2, mitochondrial / Small ribosomal subunit protein mS40 類似検索 - 構成要素
生物種
sus sucorfa (ブタ) / Sus scrofa (ブタ) / Homo sapiens (ヒト)
ジャーナル: Nature / 年: 2018 タイトル: Unique features of mammalian mitochondrial translation initiation revealed by cryo-EM. 著者: Eva Kummer / Marc Leibundgut / Oliver Rackham / Richard G Lee / Daniel Boehringer / Aleksandra Filipovska / Nenad Ban / 要旨: Mitochondria maintain their own specialized protein synthesis machinery, which in mammals is used exclusively for the synthesis of the membrane proteins responsible for oxidative phosphorylation. The ...Mitochondria maintain their own specialized protein synthesis machinery, which in mammals is used exclusively for the synthesis of the membrane proteins responsible for oxidative phosphorylation. The initiation of protein synthesis in mitochondria differs substantially from bacterial or cytosolic translation systems. Mitochondrial translation initiation lacks initiation factor 1, which is essential in all other translation systems from bacteria to mammals. Furthermore, only one type of methionyl transfer RNA (tRNA) is used for both initiation and elongation, necessitating that the initiation factor specifically recognizes the formylated version of tRNA (fMet-tRNA). Lastly, most mitochondrial mRNAs do not possess 5' leader sequences to promote mRNA binding to the ribosome. There is currently little mechanistic insight into mammalian mitochondrial translation initiation, and it is not clear how mRNA engagement, initiator-tRNA recruitment and start-codon selection occur. Here we determine the cryo-EM structure of the complete translation initiation complex from mammalian mitochondria at 3.2 Å. We describe the function of an additional domain insertion that is present in the mammalian mitochondrial initiation factor 2 (mtIF2). By closing the decoding centre, this insertion stabilizes the binding of leaderless mRNAs and induces conformational changes in the rRNA nucleotides involved in decoding. We identify unique features of mtIF2 that are required for specific recognition of fMet-tRNA and regulation of its GTPase activity. Finally, we observe that the ribosomal tunnel in the initiating ribosome is blocked by insertion of the N-terminal portion of mitochondrial protein mL45, which becomes exposed as the ribosome switches to elongation mode and may have an additional role in targeting of mitochondrial ribosomes to the protein-conducting pore in the inner mitochondrial membrane.
名称: Mitochondrial ribosomal protein L12 / タイプ: protein_or_peptide / ID: 1 詳細: Unassigned residues have been built as poly-alanine. コピー数: 7 / 光学異性体: LEVO
名称: Mitochondrial ribosomal protein L11 / タイプ: protein_or_peptide / ID: 20 詳細: Unassigned residues have been built as poly-alanine. コピー数: 1 / 光学異性体: LEVO
MALRSRFWAL LSICRNPGCR AAALSTSCKP ATNPETDPVE NEAVAPEFTN RNPRNLELLA VARKERGWGT VWPSREFWHR LRVIRTQHH IEALVEHRNG QVVVSASTRE WAIKKHLYST RNVVACESVG RVLAERCLEA GINFMVYHPT PWEAASDSIK R LQHAMTEG GVVLREPRRI YE
UniProtKB: Mitochondrial ribosomal protein L18
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分子 #27: Mitochondrial ribosomal protein L19
分子
名称: Mitochondrial ribosomal protein L19 / タイプ: protein_or_peptide / ID: 27 詳細: Unassigned residues have been built as poly-alanine. コピー数: 1 / 光学異性体: LEVO
UniProtKB: 28S ribosomal protein S7, mitochondrial
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分子 #62: 28S ribosomal protein S9, mitochondrial
分子
名称: 28S ribosomal protein S9, mitochondrial / タイプ: protein_or_peptide / ID: 62 詳細: Unassigned residues have been built as poly-alanine. コピー数: 1 / 光学異性体: LEVO
分子 #88: Pentatricopeptide repeat domain-containing protein 3, mitochondrial
分子
名称: Pentatricopeptide repeat domain-containing protein 3, mitochondrial タイプ: protein_or_peptide / ID: 88 詳細: Unassigned residues have been built as poly-alanine. コピー数: 1 / 光学異性体: LEVO