ジャーナル: EMBO J / 年: 2024 タイトル: Structural basis of 3'-tRNA maturation by the human mitochondrial RNase Z complex. 著者: Genís Valentín Gesé / B Martin Hällberg / 要旨: Maturation of human mitochondrial tRNA is essential for cellular energy production, yet the underlying mechanisms remain only partially understood. Here, we present several cryo-EM structures of the ...Maturation of human mitochondrial tRNA is essential for cellular energy production, yet the underlying mechanisms remain only partially understood. Here, we present several cryo-EM structures of the mitochondrial RNase Z complex (ELAC2/SDR5C1/TRMT10C) bound to different maturation states of mitochondrial tRNA, showing the molecular basis for tRNA-substrate selection and catalysis. Our structural insights provide a molecular rationale for the 5'-to-3' tRNA processing order in mitochondria, the 3'-CCA antideterminant effect, and the basis for sequence-independent recognition of mitochondrial tRNA substrates. Furthermore, our study links mutations in ELAC2 to clinically relevant mitochondrial diseases, offering a deeper understanding of the molecular defects contributing to these conditions.
ZincphosphodiesteraseELACprotein2 / ElaC homolog protein 2 / Heredity prostate cancer protein 2 / Ribonuclease Z 2 / RNase Z 2 / tRNA 3 ...ElaC homolog protein 2 / Heredity prostate cancer protein 2 / Ribonuclease Z 2 / RNase Z 2 / tRNA 3 endonuclease 2 / tRNase Z 2
分子量: 89142.328 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: ELAC2, HPC2 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q9BQ52, tRNase Z
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RNA鎖 , 1種, 1分子 T
#3: RNA鎖
mt-tRNA-His-CCA
分子量: 22626.486 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) Homo sapiens (ヒト) / 参照: GenBank: 1896813685
解像度: 2.96→2.96 Å / Cor.coef. Fo:Fc: 0.811 / SU B: 24.858 / SU ML: 0.401 / ESU R: 0.376 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS