A gene involved in the biogenesis of cytochromes is co-transcribed with a ribosomal protein gene in wheat mitochondria

Gonzalez, D.H. . Inst. de Biologie Moleculaire des Plantes du Centre National da la Recherche Scientifique; Bonnard, G.; Grienenberger, J.M.

A gene involved in the biogenesis of cytochromes is co-transcribed with a ribosomal protein gene in wheat mitochondria

1993

Gonzalez, D.H. (Louis Pasteur Univ., Strasbourg (France). Inst. de Biologie Moleculaire des Plantes du Centre National da la Recherche Scientifique) | Bonnard, G. | Grienenberger, J.M.

Sequence analysis of a transcribed region of the wheat mitochondrial (mt) genome revealed two open reading frames (orfs) coding for proteins of 589 and 174 amino acids. Both genes are co-transcribed in a 2.6-kb RNA. The largest orf codes for a hydrophobic protein which bears similarity to a bacterial protein involved in the biogenesis of c-type cytochromes. Its corresponding RNA sequence is fully edited at 34 positions. The second orf encodes a protein homologous to the amino-terminal third of Escherichia coli ribosomal protein S1, corresponding to the ribosome-binding domain of this protein. Its RNA sequence is edited at four positions, one of the edits creating a stop codon. The presence of both proteins in wheat mitochondria was demonstrated using specific antibodies raised against fusion proteins obtained in E. coli from the corresponding cDNAs.

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