| Literature DB >> 6322126 |
K A Osinga, E De Vries, G T Van der Horst, H F Tabak.
Abstract
The initiation of transcription of the yeast mitochondrial genes coding for subunit I of cytochrome c oxidase (COX1) and for tRNA1Thr has been examined. COX1 messenger RNA synthesis is initiated in a conserved nonanucleotide sequence (ATATAAGTA) which we have previously found immediately upstream of ribosomal RNA genes at positions at which RNA synthesis starts. The 5'-end of the precursor of tRNA1Thr is located in a variant nonanucleotide motif (TTATAAGTA), which may be characteristic for tRNA genes. Using a partially purified fraction of mtRNA polymerase, we demonstrate that RNA synthesis is precisely initiated in vitro in nonanucleotide sequences preceding both ribosomal RNA-, tRNA- and messenger RNA-encoding genes and origins of replication.Entities:
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Year: 1984 PMID: 6322126 PMCID: PMC318628 DOI: 10.1093/nar/12.4.1889
Source DB: PubMed Journal: Nucleic Acids Res ISSN: 0305-1048 Impact factor: 16.971