2010 年 74 巻 5 号 p. 1073-1078
Complex I is the first enzyme in the mitochondrial respiratory chain. It extracts energy from NADH, which is produced by the oxidation of sugars and fats, and traps the energy by virtue of a potential difference or voltage across the mitochondrial inner membrane. Herein, the genomic sequence and four splice variants encoding the complex I 19-kD subunit were isolated from Dunaliella salina. There were four transcripts coding for the complex I 19-kD subunit due to alternative splicing in algae, and the four transcripts were translated to two protein isoforms with varying C-terminals. We report the splicing pattern in the 3′-region of the D. salina 19-kD subunit, in which three of the exons (5, 6, and 7) could be alternatively spliced. Moreover, we found that four alternatively spliced variants were subject to coordinated transcription in response to different stresses by real-time quantitative PCR.
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