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  • Title: Toward an accurate mechanistic understanding of Wolbachia-induced cytoplasmic incompatibility.
    Author: Wang W, Cui W, Yang H.
    Journal: Environ Microbiol; 2022 Oct; 24(10):4519-4532. PubMed ID: 35859330.
    Abstract:
    Wolbachia are the most successful intracellular bacteria in arthropods. They can manipulate host reproduction to favour infected females, which transmit Wolbachia to their progeny and increase the presence of Wolbachia in the population. The reproductive alterations caused by Wolbachia include feminization, parthenogenesis, male killing and cytoplasmic incompatibility (CI), among which CI is the most common. CI leads to embryonic lethality when Wolbachia-infected males mate with uninfected females or those infected with an incompatible strain. This lethality can be rescued if females are infected with a compatible strain. Although CI was described in the 1960s and its connection to Wolbachia was made in the 1970s, the genes responsible for CI, called CI factors, were not identified until recently. Since then, significant progress has been made in understanding the molecular mechanism of CI using a combination of genetic, phylogenetic, biochemical and structural approaches. The detailed molecular mechanisms behind this fascinating endosymbiotic bacteria-induced phenotype have begun to emerge. Here, we summarize recent progress in understanding the molecular mechanism of CI, especially focusing on the recently solved CI factor structures and discussing what these new structures brought in terms of CI mechanism.
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