title: The cytochrome oxidase subunit III gene in sunflower mitochondria is cotranscribed with an open reading frame conserved in higher plants.
abstract: The gene encoding subunit III of cytochrome oxidase (COXIII) has been identified in the sunflower mitochondrial genome. The COXIII coding region is located 570 bp downstream of a 477 bp open reading frame (ORFB). Sequence comparisons and hybridization experiments show that ORFB sequences are conserved in other plant mitochondrial genomes. Nucleotide and amino acid sequence comparisons suggest that RNA editing is required in sunflower mitochondria to synthesize a functional COXIII polypeptide.
authors.affiliation: Dipartimento di Biologia Cellulare, Università della Calabria, Arcavacata di Rende, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Quagliariello
authors.forename: A
authors.initials: A
authors.lastname: Saiardi
authors.forename: R
authors.initials: R
authors.lastname: Gallerani
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D003062:Codon; D004272:DNA, Mitochondrial / Q000032:analysis*; D003576:Electron Transport Complex IV / Q000235:genetics*; D017343:Genes, Plant; D006368:Helianthus / Q000235:genetics*; D007438:Introns; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D012323:RNA Processing, Post-Transcriptional; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic
chemical_list: D003062:Codon; D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV