Host-Mediated Viral Mutations: APOBECs, ADARs, and Beyond
A special issue of Viruses (ISSN 1999-4915). This special issue belongs to the section "Human Virology and Viral Diseases".
Deadline for manuscript submissions: 1 September 2025 | Viewed by 2080
Special Issue Editor
Interests: APOBECs; cytidine deaminase; AID; viral antagonists; viral hypermutation; innate immunity; viral selection
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The apolipoprotein B mRNA-editing enzyme, catalytic polypeptide (APOBEC) family of enzymes is responsible for the deamination of cytosine in single-stranded RNA and DNA. In humans, this family includes 11 members, including APOBEC1, 2, 3A, 3B, 3C, 3D, 3F, 3G, 3H, 4, and activation-induced cytidine deaminase (AID). The functions of these enzymes range from epigenetic modifications of DNA, including removal of methylcytosine and 5-hydroxymethylcytosine, to mutagenesis of host and viral mRNAs. Current evidence suggests that both RNA and DNA viruses are mutagenized by APOBECs, leading to selection and altered pathogenicity. Although APOBECs are typically associated with the innate immune response to viral infections, AID is a primordial member of the family that controls affinity maturation of antibodies as well as effector functions by class switch recombination. Viral manipulation of APOBECs often is observed by enzyme relocalization or degradation, and APOBEC antagonists include both virally specified RNAs and proteins. Adenosine deaminases acting on RNA (ADARs) result in inosine substitutions (A-to-I editing) on double-stranded RNAs. Both APOBECs and ADARs are inducible by interferons and can function in both the cytosol and nucleus to affect both viral and cellular gene function. In addition, multiple viruses, including SARS CoV-2, have been shown to induce the host DNA damage response (DDR), resulting in genomic loss of integrity and inflammation. This issue will address new insights into APOBECs, ADARs, and host DDR for their impact on viral selection and the immune response.
Prof. Dr. Jaquelin P. Dudley
Guest Editor
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Keywords
- cytosine and adenosine deamination
- methylcytosine
- epigenetics
- mutagenesis
- cancer
- APOBEC antagonists
- ADAR
- DNA damage response
- innate immunity
- adaptive immunity
- virus selection
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