A deletion insertion leading to the generation of a direct repeat as a result of slipped mispairing and intragenic recombination in the faster VIII gene
K. Tavassoli et al., A deletion insertion leading to the generation of a direct repeat as a result of slipped mispairing and intragenic recombination in the faster VIII gene, HUM GENET, 104(5), 1999, pp. 435-437
A deletion/insertion in the human factor VIII gene was found in a patient w
ith severe hemophilia A; 316 bp were removed, viz., those enclosing part of
intron 15 and the first 7 bp of exon 16. In addition to the deletion, 6 bp
were added to the deletion breakpoints; this resulted in the duplication o
f an existing 13-bp unit. Thus, an overlapping 13-bp direct repeat was gene
rated at the deletion junction. Moreover, the deleted fragment itself was f
lanked by two homologous 6-bp sequences, one unit being lost by the deletio
n. A combination of slipped mispairing during replication and an intragenic
recombination is discussed to describe this deletion/insertion process.