We have characterized the human gene NDUFAS encoding a 13-kDa subunit of th
e mitochondrial respiratory chain complex I (NADH: ubiquinone oxidoreductas
e). The gene contains 5 exons and 4 introns, and spans 14 kb of genomic DNA
. In the untranscribed region we observed potential transcription factor bi
nding sites. We determined a single nucleotide variant (C/T) at -318, and i
ts frequency in the German population. The functional gene was localised by
FISH to 7q31 and by radiation hybrid panel near marker D7S648 in YAC 883_a
_2.