The excised leader of human cytochrome c oxidase subunit I mRNA which contains the origin of mitochondrial DNA light-strand synthesis accumulates in mitochondria and is polyadenylated.
We identified a polyadenylated RNA species which contains the origin of human mitochondrial DNA light-strand synthesis and the surrounding complementary sequences of the four light-strand-encoded tRNAs. This RNA (RNA 9L) is probably derived from the leader portion of RNA 6 which is excised during the formation of the mature cytochrome c oxidase subunit mRNA (RNA 9). The high degree of secondary structure of this RNA is presumably responsible for its anomalous electrophoretic behavior in denaturing polyacrylamide gels.
D003576:Electron Transport Complex IV / Q000235:genetics*; D006801:Humans; D008928:Mitochondria / Q000502:physiology*; D009690:Nucleic Acid Conformation; D011061:Poly A / Q000235:genetics; D012323:RNA Processing, Post-Transcriptional; D012333:RNA, Messenger / Q000235:genetics; D012343:RNA, Transfer / Q000235:genetics; D014158:Transcription, Genetic
D012333:RNA, Messenger; D011061:Poly A; D012343:RNA, Transfer; D003576:Electron Transport Complex IV