ArticleThe Journal of biological chemistry2011
Phosphorylation of eukaryotic translation initiation factor 4B (EIF4B) by open reading frame 45/p90 ribosomal S6 kinase (ORF45/RSK) signaling axis facilitates protein translation during Kaposi sarcoma-associated herpesvirus (KSHV) lytic replication.
Article in The Journal of biological chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers.
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Who cites it
55 citing papers in PubMed, 77 citations in OpenAlex.
- ORF45-induced Filamin A phosphorylation promotes cell motility and cell-contact dependent viral infection of Kaposi's sarcoma-associated herpesvirus.PLoS pathogens · 2025Article
- Manipulation of Nuclear-Related Pathways During Kaposi's Sarcoma-Associated Herpesvirus Lytic Replication.Viruses · 2025Review
- KSHV hijacks the antiviral kinase IKKε to initiate lytic replication.PLoS pathogens · 2025Article
- FoxK1 and FoxK2 cooperate with ORF45 to promote late lytic replication of Kaposi's sarcoma-associated herpesvirus.Journal of virology · 2024Article
- Conserved linear motif within the immediate early protein ORF45 promotes its engagement with KSHV lytic cycle-promoting forkhead transcription factors, FOXK1 and FOXK2.Journal of virology · 2024Article
- The Modulation of Immune Responses inViruses · 2023Article
- Kaposi's Sarcoma-Associated Herpesvirus Immediate Early Proteins Trigger FOXQ1 Expression in Oral Epithelial Cells, Engaging in a Novel Lytic Cycle-Sustaining Positive Feedback Loop.Journal of virology · 2023Article
- Article
- Suppression of KSHV lytic replication and primary effusion lymphoma by selective RNF5 inhibition.PLoS pathogens · 2023Article
- Upregulation of ATF4-LAMP3 Axis by ORF45 Facilitates Lytic Replication of Kaposi's Sarcoma-Associated Herpesvirus.Journal of virology · 2022Article
- Cardiovirus leader proteins retarget RSK kinases toward alternative substrates to perturb nucleocytoplasmic traffic.PLoS pathogens · 2022Article
- The ORF45 Protein of Kaposi's Sarcoma-Associated Herpesvirus and Its Critical Role in the Viral Life Cycle.Viruses · 2022Review
- RSK1 promotes mammalian axon regeneration by inducing the synthesis of regeneration-related proteins.PLoS biology · 2022Article
- The SUMO E3 ligase activity of ORF45 determines KSHV lytic replication.PLoS pathogens · 2022Article
- A case of convergent evolution: Several viral and bacterial pathogens hijack RSK kinases through a common linear motif.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- A non-catalytic herpesviral protein reconfigures ERK-RSK signaling by targeting kinase docking systems in the host.Nature communications · 2022Article
- Ribosomal Protein S6: A Potential Therapeutic Target against Cancer?International journal of molecular sciences · 2021Review
- RSK1 SUMOylation is required for KSHV lytic replication.PLoS pathogens · 2021Article
- The ORF45 Protein of Kaposi Sarcoma-Associated Herpesvirus Is an Inhibitor of p53 Signaling during Viral Reactivation.Journal of virology · 2021Article
- Deficiency of eIF4B Increases Mouse Mortality and Impairs Antiviral Immunity.Frontiers in immunology · 2021Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
Abstract
Open reading frame 45 (ORF45) of Kaposi sarcoma-associated herpesvirus (KSHV) causes sustained activation of p90 ribosomal S6 kinase (RSK), which is crucial for KSHV lytic replication, but the exact functional roles remain to be determined. To characterize the biological consequence of persistent RSK activation by ORF45, we screened known cellular substrates of RSK. We found that ORF45 induced phosphorylation of eukaryotic translation initiation factor 4B (eIF4B), increased its assembly into translation initiation complex, and subsequently facilitated protein translation. The ORF45/RSK-mediated eIF4B phosphorylation was distinguishable from that caused by the canonical AKT/mammalian target of rapamycin/ribosomal S6 kinase and MEK/ERK/RSK pathways because it was resistant to both rapamycin (an mammalian target of rapamycin inhibitor) and U1026 (an MEK inhibitor). The rapamycin and U1026 doubly insensitive eIF4B phosphorylation was induced during KSHV reactivation but was abolished if either ORF45 or RSK1/2 were ablated by siRNA, a pattern that is correlated with reduced lytic gene expression as we observed previously. Ectopic expression of eIF4B but not its phosphorylation-deficient mutant form increased KSHV lytic gene expression and production of progeny viruses. Together, these results indicated that ORF45/RSK axis-induced eIF4B phosphorylation is involved in translational regulation and is required for optimal KSHV lytic replication.
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