NDLI: A single editing event is a prerequisite for efficient processing of potato mitochondrial phenylalanine tRNA.

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A single editing event is a prerequisite for efficient processing of potato mitochondrial phenylalanine tRNA.

Content Provider	PubMed Central
Author	Marechal-drouard, L. Cosset, A. Remacle, C. Ramamonjisoa, D. Dietrich, A.
Abstract	In bean, potato, and Oenothera plants, the C encoded at position 4 (C4) in the mitochondrial tRNA Phe GAA gene is converted into a U in the mature tRNA. This nucleotide change corrects a mismatched C4-A69 base pair which appears when the gene sequence is folded into the cloverleaf structure. C-to-U conversions constitute the most common editing events occurring in plant mitochondrial mRNAs. While most of these conversions introduce changes in the amino acids specified by the mRNA and appear to be essential for the synthesis of functional proteins in plant mitochondria, the putative role of mitochondrial tRNA editing has not yet been defined. Since the edited form of the tRNA has the correct secondary and tertiary structures compared with the nonedited form, the two main processes which might be affected by a nucleotide conversion are aminoacylation and maturation. To test these possibilities, we determined the aminoacylation properties of unedited and edited potato mitochondrial tRNAPhe in vitro transcripts, as well as the processing efficiency of in vitro-synthesized potato mitochondrial tRNAPhe precursors. Reverse transcription-PCR amplification of natural precursors followed by cDNA sequencing was also used to investigate the influence of editing on processing. Our results show that C-to-U conversion at position 4 in the potato mitochondrial tRNA Phe GAA is not required for aminoacylation with phenylalanine but is likely to he essential for efficient processing of this tRNA.
Starting Page	3504
File Format	PDF
ISSN	10985549
e-ISSN	10985549
Journal	Molecular and Cellular Biology
Issue Number	7
Volume Number	16
Language	English
Publisher Date	1996-07-01
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Molecular Biology

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