Mutated tam at the endogenous locus: carries a mutation in a highly conserved residue (amino acid replacement H1038A). Generated by re-integration of DNA into the attP site present in tamKO. Additional sequences inserted during the re-integration event are also present: 1. a loxP cassette containing the wGMR.PHb marker, upstream of tam, 2. a single attR site, downstream of tam.
CAT13824466GCT
CA?GC
H1038A
CA to GC nucleotide change leads to a H1038A mutation in the reintroduced copy of the PolG1 gene at the endogenous site.
tamH1038A/tamH1038A mutants die in the third instar stage and exhibit significantly lower body weight, as compared to controls.
tamH1038A/+ flies do not exhibit a significant increase in mtDNA mutation frequency, as compared to wild type. tamH1038A/tamH1038A, but not tamH1038A/+, mutants exhibit a severe reduction in mtDNA levels, as compared to wild type.
tamH1038A/tamD263A flies do not exhibit any significant difference in body weight or mtDNA levels as compared to controls, but do exhibit a significant increase in mtDNA mutation frequency, and offspring of tamH1038A/tamD263A mothers exhibit a significant developmental delay.
tamKO/tamQ1009A and tamKO/tamH1038A mutants exhibit lethality, with most individuals dying in the third instar larval stage, and the remainder dying during pupal stage; and larvae exhibit a significant decrease in body weight, as compared to controls.
tamRescue/tamH1038A mutants do not exhibit a significant difference in mtDNA levels, as compared to wild type.
tam4/tamH1038A and tam3/tamH1038A mutants exhibit complete lethality.