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- W4366602511 abstract "Malarial parasites exhibit extensive genomic plasticity, which induces the antigen diversification and the development of antimalarial drug resistance. Only a few studies have examined the genome maintenance mechanisms of parasites. The study aimed at elucidating the impact of a mutation in a DNA mismatch repair gene on genome stability by maintaining the mutant and wild-type parasites through serial in vitro cultures for approximately 400 days and analysing the subsequent spontaneous mutations. A P513T mutant of the DNA mismatch repair protein PfMSH2-1 from Plasmodium falciparum 3D7 was created. The mutation did not influence the base substitution rate but significantly increased the insertion/deletion (indel) mutation rate in short tandem repeats (STRs) and minisatellite loci. STR mutability was affected by allele size, genomic category and certain repeat motifs. In the mutants, significant telomere healing and homologous recombination at chromosomal ends caused extensive gene loss and generation of chimeric genes, resulting in large-scale chromosomal alteration. Additionally, the mutant showed increased tolerance to N-methyl-N'-nitro-N-nitrosoguanidine, suggesting that PfMSH2-1 was involved in recognizing DNA methylation damage. This work provides valuable insights into the role of PfMSH2-1 in genome stability and demonstrates that the genomic destabilization caused by its dysfunction may lead to antigen diversification." @default.
- W4366602511 created "2023-04-23" @default.
- W4366602511 creator A5002550974 @default.
- W4366602511 creator A5003384343 @default.
- W4366602511 creator A5033300816 @default.
- W4366602511 creator A5048415812 @default.
- W4366602511 date "2023-04-21" @default.
- W4366602511 modified "2023-10-01" @default.
- W4366602511 title "Analysis of genome instability and implications for the consequent phenotype in Plasmodium falciparum containing mutated MSH2-1 (P513T)" @default.
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- W4366602511 doi "https://doi.org/10.1099/mgen.0.001003" @default.
- W4366602511 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37083479" @default.
- W4366602511 hasPublicationYear "2023" @default.
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