Abstract:
:Endogenous retroviruses (ERVs) have accumulated in vertebrate genomes and contribute to the complexity of gene regulation. KAP1 represses ERVs during development by its recruitment to their repetitive sequences through KRAB zinc-finger proteins (KZNFs), but little is known about the regulation of ERVs in adult tissues. We observed that KAP1 repression of HERVK14C was conserved in differentiated human cells and performed KAP1 knockout to obtain an overview of KAP1 function. Our results show that KAP1 represses ERVs (including HERV-T and HERV-S) and ZNF genes, both of which overlap with KAP1 binding sites and H3K9me3 in multiple cell types. Furthermore, this pathway is functionally conserved in adult human peripheral blood mononuclear cells. Cytosine methylation that acts on KAP1 regulated loci is necessary to prevent an interferon response, and KAP1-depletion leads to activation of some interferon-stimulated genes. Finally, loss of KAP1 leads to a decrease in H3K9me3 enrichment at ERVs and ZNF genes and an RNA-sensing response mediated through MAVS signaling. These data indicate that the KAP1-KZNF pathway contributes to genome stability and innate immune control in adult human cells.
journal_name
EMBO Repjournal_title
EMBO reportsauthors
Tie CH,Fernandes L,Conde L,Robbez-Masson L,Sumner RP,Peacock T,Rodriguez-Plata MT,Mickute G,Gifford R,Towers GJ,Herrero J,Rowe HMdoi
10.15252/embr.201745000subject
Has Abstractpub_date
2018-10-01 00:00:00issue
10eissn
1469-221Xissn
1469-3178pii
embr.201745000journal_volume
19pub_type
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