Saturation of the processing of newly synthesized rRNA in isolated brain mitochondria

FEBS Letters

López-Pérez, M.J.¹  Enriquez, J.A.¹  Montoya, J.¹ 

[1] Departamento de Bioquimica y Biologia Molecular y Celular, Facultad de Veterinaria, Universidad de Zaragoza, Miguel Servet 177, 50013 Zaragoza, Spain

关键词: Mitochondria;    RNA synthesis;    RNA processing;    Isolated organelle;    Rat brain;   

DOI  :  10.1016/0014-5793(91)80197-B

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Isolated rat brain mitochondria, when incubated in the presence of (α-³²P)UTP in an appropriate incubation buffer, in which the energy requirements are provided by exogenous ADP in the presence of an oxidizable substrate, are able to support mitochondrial DNA transcription and RNA processing in a way faithfully resembling the in vivo process. Furthermore, we have strikingly found a saturation of the synthesis of mature 16 S and 12 S rRNA under conditions in which their RNA precursor as well as the mature mRNAs continue being synthesized. This suggests that synthesis of mature rRNAs could be regulated at the level of processing of their precursor rather than at the level of transcription.

【 授权许可】

Unknown