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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Trans splicing in Oenothera mitochondria: nad1 mRNAs are edited in exon and trans-splicing group II intron sequences.

The complete NADH dehydrogenase subunit 1 (nad1) ORF in Oenothera mitochondria is encoded by five exons. These exons are located in three distant locations of the mitochondrial genome. One genomic region encodes exon a, the second encodes exons b and c, and the third specifies exons d and e. Cis-splicing group II introns separate exons b and c and d and e, while trans-splicing reactions are required to link exons a and b and c and d. The two parts of the group II intron sequences involved in these trans-splicing events can be aligned in domain IV. Exon sequences and the maturase-related ORF in intron d/e are edited by numerous C to U alterations in the mRNA. Two RNA editing events in the trans-splicing intron a/b improve conservation of the secondary structure in the stem of domain VI. RNA editing in intron sequences may thus be required for the trans-splicing reaction.[1]

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