[Mobile genetic element MDG4 (gypsy) in Drosophila melanogaster. Features of structure and regulation of transposition].
Distribution of two structural functional variants of the MDG4 (gypsy) mobile genetic element was examined in 44 strains of Drosophila melanogaster. The results obtained suggest that less transpositionally active MDG4 variant is more ancient component of the Drosophila genome. Using Southern blotting, five strains characterized by increased copy number of MDG4 with significant prevalence of the active variant over the less active one were selected for further analysis. Genetic analysis of these strains led to the suggestion that some of them carry factors that mobilize MDG4 independently from the cellular flamenco gene known to be responsible for transposition of this element. Other strains probably contained a suppressor of the flam- mutant allele causing active transpositions of the MDG4. Thus, the material for studying poorly examined relationships between the retrovirus and the host cell genome was obtained.
Kusulidu
L K
LK
Department of Genetics and Breeding, Lomonosov Moscow State University, Moscow, 119899 Russia.
Karpova
N N
NN
Razorenova
O V
OV
Glukhov
I A
IA
Kim
A I
AI
Liubomirskaia
N V
NV
Il'in
Iu V
IuV
D000818:Animals; D015139:Blotting, Southern; D004331:Drosophila melanogaster; D016678:Genome; D009154:Mutation; D018626:Retroelements; D013045:Species Specificity
D018626:Retroelements
Mobil'nyĭ geneticheskiĭ élement MDG4 (gypsy) v liniiakh Drosophila melanogaster. Osobennosti struktury i reguliatsiia transpozitsii.