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Intragenic rearrangements in the mitochondrial NADH dehydrogenase subunit 6 gene of vertebrates

✍ Scribed by Truls Moum; Nils P. Willassen; Steinar Johansen

Publisher: Springer-Verlag
Year: 1994
Tongue: English
Weight: 451 KB
Volume: 25
Category: Article
ISSN: 0172-8083
DOI: 10.1007/bf00351677

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✦ Synopsis

We have sequenced the mitochondrial-encoded NADH dehydrogenase subunit 6 gene from 19 species of birds. Comparison of the derived amino-acid sequences in 22 avian species, six mammals, and two fishes, reveals an intragenic rearrangement in mammals. The C-terminal half of the mammalian protein includes an internal insertion of 10-15 amino acids and a C-terminal deletion of 8-9 amino acids. Based on comparative sequence alignments and hydropathy profile analysis, five hydrophobic segments (designated I to V) corresponding to transmembrane regions are proposed. In this structural model of NADH dehydrogenase subunit 6, the mammalian insertion is found in a variable loop region between transmembrane segments IV and V.

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