Article ; Online: The immediate-early protein 1 of human herpesvirus 6B interacts with NBS1 and inhibits ATM signaling.
2024 Volume 25, Issue 2, Page(s) 725–744
Abstract: Viral infection often trigger an ATM serine/threonine kinase (ATM)-dependent DNA damage response in host cells that suppresses viral replication. Viruses evolved different strategies to counteract this antiviral surveillance system. Here, we report that ... ...
Abstract | Viral infection often trigger an ATM serine/threonine kinase (ATM)-dependent DNA damage response in host cells that suppresses viral replication. Viruses evolved different strategies to counteract this antiviral surveillance system. Here, we report that human herpesvirus 6B (HHV-6B) infection causes genomic instability by suppressing ATM signaling in host cells. Expression of immediate-early protein 1 (IE1) phenocopies this phenotype and blocks homology-directed double-strand break repair. Mechanistically, IE1 interacts with NBS1, and inhibits ATM signaling through two distinct domains. HHV-6B seems to efficiently inhibit ATM signaling as further depletion of either NBS1 or ATM do not significantly boost viral replication in infected cells. Interestingly, viral integration of HHV-6B into the host's telomeres is not strictly dependent on NBS1, challenging current models where integration occurs through homology-directed repair. Given that spontaneous IE1 expression has been detected in cells of subjects with inherited chromosomally-integrated form of HHV-6B (iciHHV-6B), a condition associated with several health conditions, our results raise the possibility of a link between genomic instability and the development of iciHHV-6-associated diseases. |
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MeSH term(s) | Humans ; Herpesvirus 6, Human/genetics ; Herpesvirus 6, Human/metabolism ; Roseolovirus Infections/genetics ; Immediate-Early Proteins/genetics ; Immediate-Early Proteins/metabolism ; Virus Integration ; Genomic Instability ; Ataxia Telangiectasia Mutated Proteins/genetics ; Ataxia Telangiectasia Mutated Proteins/metabolism |
Chemical Substances | Immediate-Early Proteins ; ATM protein, human (EC 2.7.11.1) ; Ataxia Telangiectasia Mutated Proteins (EC 2.7.11.1) |
Language | English |
Publishing date | 2024-01-02 |
Publishing country | England |
Document type | Journal Article |
ZDB-ID | 2020896-0 |
ISSN | 1469-3178 ; 1469-221X |
ISSN (online) | 1469-3178 |
ISSN | 1469-221X |
DOI | 10.1038/s44319-023-00035-z |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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