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Localization, sequence and expression of the gene coding for tRNA(Pro) (UGG) in plant mitochondria
P Runeberg-Roos1, J M Grienenberger, P Guillemaut
1Laboratoire de Biochimie, IBMC, Université Louis Pasteur, 15 rue Descartes, F-67084, Strasbourg Cedex, France.
Plant Molecular Biology
|November 27, 2013
Summary
Researchers identified a proline transfer RNA (tRNA) gene in wheat mitochondrial DNA, also found in maize and bean mitochondria. This gene is actively transcribed in both wheat and maize mitochondria.
Area of Science:
- Mitochondrial genetics
- Molecular biology
- Plant genomics
Background:
- Wheat mitochondrial DNA contains ribosomal RNA genes.
- Transfer RNA (tRNA) genes are essential for protein synthesis.
- Investigating mitochondrial genomes reveals functional genetic elements.
Purpose of the Study:
- To identify tRNA genes within wheat mitochondrial DNA fragments containing ribosomal RNA genes.
- To determine the presence and transcription of a specific tRNA(Pro) (UGG) gene in related plant species.
- To map the localization of this tRNA gene in the maize mitochondrial genome.
Main Methods:
- Sal I digestion of wheat mitochondrial DNA.
- DNA sequencing of specific fragments.
- Gene localization studies in maize.
- In vitro transcription and post-labeling techniques.
Main Results:
- A tRNA(Pro) (UGG) gene was identified in two of four Sal I fragments of wheat mitochondrial DNA.
- The corresponding gene was localized on the maize mitochondrial genome.
- This tRNA(Pro) (UGG) gene is transcribed in both wheat and maize mitochondria.
- The sequence of the bean mitochondrial tRNA(Pro) (UGG) was determined.
Conclusions:
- Wheat mitochondrial DNA harbors a functional tRNA(Pro) (UGG) gene.
- This gene is conserved and transcribed across different plant mitochondrial genomes (wheat, maize, bean).
- The findings contribute to understanding mitochondrial gene organization and expression in plants.
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