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基本情報
登録情報 | データベース: PDB / ID: 8cbm | ||||||
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タイトル | Structure of human mitochondrial CCA-adding enzyme in complex with mitochondrial pre-tRNA-Ile | ||||||
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![]() | RNA BINDING PROTEIN / RNA maturation / RNA modification / mitochondrial tRNA / RNA methyltransferase / MRPP1 / MRPP2 / MRPP3 / m6A / RNA binding / RNA recognition | ||||||
機能・相同性 | ![]() 5'-3' RNA polymerase activity / CCA tRNA nucleotidyltransferase activity / brexanolone metabolic process / isoursodeoxycholate 7-beta-dehydrogenase (NAD+) activity / ursodeoxycholate 7-beta-dehydrogenase (NAD+) activity / 3-hydroxy-2-methylbutyryl-CoA dehydrogenase / 3-hydroxy-2-methylbutyryl-CoA dehydrogenase activity / mitochondrial tRNA methylation / tRNA (adenine9-N1)-methyltransferase / mitochondrial RNA 5'-end processing ...5'-3' RNA polymerase activity / CCA tRNA nucleotidyltransferase activity / brexanolone metabolic process / isoursodeoxycholate 7-beta-dehydrogenase (NAD+) activity / ursodeoxycholate 7-beta-dehydrogenase (NAD+) activity / 3-hydroxy-2-methylbutyryl-CoA dehydrogenase / 3-hydroxy-2-methylbutyryl-CoA dehydrogenase activity / mitochondrial tRNA methylation / tRNA (adenine9-N1)-methyltransferase / mitochondrial RNA 5'-end processing / mitochondrial tRNA processing / tRNA (adenine(9)-N1)-methyltransferase activity / tRNA (guanine9-N1)-methyltransferase / mitochondrial ribonuclease P complex / tRNA (guanosine(9)-N1)-methyltransferase activity / mitochondrial tRNA 5'-end processing / chenodeoxycholate 7-alpha-dehydrogenase (NAD+) activity / tRNA modification in the mitochondrion / rRNA processing in the mitochondrion / tRNA processing in the mitochondrion / mitochondrial tRNA 3'-end processing / 7alpha-hydroxysteroid dehydrogenase / 17-beta-hydroxysteroid dehydrogenase (NAD+) activity / cholate 7-alpha-dehydrogenase (NAD+) activity / C21-steroid hormone metabolic process / CCA tRNA nucleotidyltransferase / tRNA surveillance / CCACCA tRNA nucleotidyltransferase activity / tRNA 3'-terminal CCA addition / tRNA methyltransferase complex / tRNA 3'-end processing / 3-hydroxyacyl-CoA dehydrogenase / L-isoleucine catabolic process / 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+) / 3-hydroxyacyl-CoA dehydrogenase (NAD+) activity / : / 3alpha(or 20beta)-hydroxysteroid dehydrogenase / androstan-3-alpha,17-beta-diol dehydrogenase (NAD+) activity / testosterone dehydrogenase (NAD+) activity / bile acid biosynthetic process / positive regulation of mitochondrial translation / 17beta-estradiol 17-dehydrogenase / estradiol 17-beta-dehydrogenase [NAD(P)+] activity / Branched-chain amino acid catabolism / tRNA processing in the nucleus / estrogen metabolic process / fatty acid beta-oxidation / mitochondrial nucleoid / androgen metabolic process / rescue of stalled ribosome / Mitochondrial protein degradation / 転移酵素; 一炭素原子の基を移すもの; メチル基を移すもの / fatty acid metabolic process / mitochondrion organization / lipid metabolic process / mRNA processing / protein homotetramerization / tRNA binding / mitochondrial matrix / protein homodimerization activity / mitochondrion / RNA binding / nucleoplasm / ATP binding / metal ion binding / identical protein binding / nucleus / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.14 Å | ||||||
![]() | MEYNIER, V. / HARDWICK, S. / CATALA, M. / ROSKE, J. / OERUM, S. / CHIRGADZE, D. / BARRAUD, P. / LUISI, B. / TISNE, C. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis for human mitochondrial tRNA maturation. 著者: Vincent Meynier / Steven W Hardwick / Marjorie Catala / Johann J Roske / Stephanie Oerum / Dimitri Y Chirgadze / Pierre Barraud / Wyatt W Yue / Ben F Luisi / Carine Tisné / ![]() ![]() 要旨: The human mitochondrial genome is transcribed into two RNAs, containing mRNAs, rRNAs and tRNAs, all dedicated to produce essential proteins of the respiratory chain. The precise excision of tRNAs by ...The human mitochondrial genome is transcribed into two RNAs, containing mRNAs, rRNAs and tRNAs, all dedicated to produce essential proteins of the respiratory chain. The precise excision of tRNAs by the mitochondrial endoribonucleases (mt-RNase), P and Z, releases all RNA species from the two RNA transcripts. The tRNAs then undergo 3'-CCA addition. In metazoan mitochondria, RNase P is a multi-enzyme assembly that comprises the endoribonuclease PRORP and a tRNA methyltransferase subcomplex. The requirement for this tRNA methyltransferase subcomplex for mt-RNase P cleavage activity, as well as the mechanisms of pre-tRNA 3'-cleavage and 3'-CCA addition, are still poorly understood. Here, we report cryo-EM structures that visualise four steps of mitochondrial tRNA maturation: 5' and 3' tRNA-end processing, methylation and 3'-CCA addition, and explain the defined sequential order of the tRNA processing steps. The methyltransferase subcomplex recognises the pre-tRNA in a distinct mode that can support tRNA-end processing and 3'-CCA addition, likely resulting from an evolutionary adaptation of mitochondrial tRNA maturation complexes to the structurally-fragile mitochondrial tRNAs. This subcomplex can also ensure a tRNA-folding quality-control checkpoint before the sequential docking of the maturation enzymes. Altogether, our study provides detailed molecular insight into RNA-transcript processing and tRNA maturation in human mitochondria. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 373.3 KB | 表示 | ![]() |
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PDB形式 | ![]() | 295.7 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
-タンパク質 , 3種, 6分子 ABCDEF
#1: タンパク質 | 分子量: 26947.021 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 遺伝子: HSD17B10, ERAB, HADH2, MRPP2, SCHAD, SDR5C1, XH98G2 プラスミド: pET28a-LIC / 発現宿主: ![]() ![]() 参照: UniProt: Q99714, 3-hydroxyacyl-CoA dehydrogenase, 17beta-estradiol 17-dehydrogenase, 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+), 3-hydroxy-2-methylbutyryl-CoA dehydrogenase, 3alpha(or ...参照: UniProt: Q99714, 3-hydroxyacyl-CoA dehydrogenase, 17beta-estradiol 17-dehydrogenase, 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+), 3-hydroxy-2-methylbutyryl-CoA dehydrogenase, 3alpha(or 20beta)-hydroxysteroid dehydrogenase, 7alpha-hydroxysteroid dehydrogenase #2: タンパク質 | | 分子量: 44989.277 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #3: タンパク質 | | 分子量: 48007.793 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 参照: UniProt: Q7L0Y3, 転移酵素; 一炭素原子の基を移すもの; メチル基を移すもの, tRNA (adenine9-N1)-methyltransferase, tRNA (guanine9-N1)-methyltransferase |
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-RNA鎖 , 1種, 1分子 T
#4: RNA鎖 | 分子量: 22138.164 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: in vitro transcription vector pT7-TP(deltai) (その他) |
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-非ポリマー , 4種, 14分子 






#5: 化合物 | ChemComp-NAD / #6: 化合物 | ChemComp-CDP / | #7: 化合物 | ChemComp-SAH / | #8: 水 | ChemComp-HOH / | |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Human mitochondrial CCA-adding enzyme in complex with mitochondrial pre-tRNAIle タイプ: COMPLEX / Entity ID: #1-#4 / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: 0.270 MDa / 実験値: NO | ||||||||||||||||||||
由来(天然) | 生物種: ![]() | ||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||
緩衝液 | pH: 8 | ||||||||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil | ||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: DIFFRACTION / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 800 nm |
撮影 | 電子線照射量: 42.2 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.14 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 25554 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 60.7 / プロトコル: AB INITIO MODEL / Target criteria: Cross-correlation coefficient |