Spontaneous mutation frequency in normal human mammary gland tissue

2012 ◽  
Vol 211 ◽  
pp. S150-S151
Author(s):  
Katja Schmalbach ◽  
Leane Lehmann
2021 ◽  
pp. 106378
Author(s):  
Iolly Tábata Oliveira Marques ◽  
Fábio Roger Vasconcelos ◽  
Juliana Paula Martins Alves ◽  
Assis Rubens Montenegro ◽  
César Carneiro Linhares Fernandes ◽  
...  

Genetics ◽  
1984 ◽  
Vol 108 (4) ◽  
pp. 859-877
Author(s):  
D G Moerman ◽  
R H Waterston

ABSTRACT This paper describes a mutator system in the nematode Caenorhabditis elegans var. Bergerac for the gene unc-22. Of nine C. elegans and two C. briggsae strains tested only the Bergerac BO strain yielded mutant animals at a high frequency and the unc-22 IV gene is a preferred mutational target. The forward spontaneous mutation frequency at the unc-22 locus in Bergerac BO is about 1 × 10-4, and most of these spontaneous unc-22 mutations revert at frequencies between 2 × 10-3 and 2 × 10-4. Both the forward mutation frequency and the reversion frequency are sensitive to genetic background. Spontaneous unc-22 mutations derived in a Bergerac background and placed in a primarily Bristol background revert at frequencies of <10-6. When reintroduced into a Bergerac/Bristol hybrid background the mutations once again become unstable. The mutator activity could not be localized to a discrete site in the Bergerac genome. Nor did mutator activity require the Bergerac unc-22 gene as a target since the Bristol unc-22 homolog placed in a Bergerac background also showed high mutation frequency. Intragenic mapping of two spontaneous unc-22 alleles, st136 and st137, place both mutations in the central region of the known unc-22 map. However, these mutations probably recombine with one another, suggesting that the unstable mutations can occur in more than one site in unc-22. Examination of the phenotypic effect of these mutations on muscle structure indicates that they are less severe in their effect than a known amber allele. We suggest that this mutator system is polygenic and dispersed over the nematode genome and could represent activity of the transposable element Tc1.


1998 ◽  
Vol 11 (11) ◽  
pp. 1339-1345 ◽  
Author(s):  
Ryszard Jankowiak ◽  
Dan Zamzow ◽  
Douglas E. Stack ◽  
Rosa Todorovic ◽  
Ercole L. Cavalieri ◽  
...  

BMC Genomics ◽  
2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Johanna Brodhagen ◽  
Rosemarie Weikard ◽  
Ulrike Thom ◽  
Annika Heimes ◽  
Juliane Günther ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document