NDLI: Viral Interferon Regulatory Factor 1 of Kaposi's Sarcoma-Associated Herpesvirus Interacts with a Cell Death Regulator, GRIM19, and Inhibits Interferon/Retinoic Acid-Induced Cell Death

Content Provider	PubMed Central
Author	Seo, Taegun Lee, Daeyoup Shim, Young Sam Angell, Jon E. Chidambaram, Natesa V. Kalvakolanu, Dhananjaya V. Choe, Joonho
Copyright Year	2002
Abstract	Kaposi's sarcoma-associated herpesvirus (KSHV) plays a significant role in the development of Kaposi's sarcoma, primary effusion lymphoma, and some forms of multicentric Castleman's disease. The KSHV open reading frame K9 encodes the viral interferon (IFN) factor 1 (vIRF1), which downregulates IFN- and IRF-mediated transcriptional activation, and leads to cellular transformation in rodent fibroblasts and induction of tumors in nude mice. Using the yeast two-hybrid assay, we identified genes associated with retinoid-IFN-induced mortality-19 (GRIM19), which interacts directly with vIRF1, both in vivo and in vitro. The N-terminal region of vIRF1 is required for binding GRIM19. Colocalization of vIRF1 and GRIM19 was observed in 293T cells. The vIRF1 protein deregulates GRIM19-induced apoptosis in the presence of IFN/all-trans-retinoic acid (RA) and inhibits IFN/RA-induced cell death. Another DNA tumor viral protein, human papillomavirus type 16 E6, also binds GRIM19, suggesting that this is a general target of viral proteins. Our results collectively indicate that vIRF1 modulates IFN/RA-cell death signals via interactions with GRIM19.
Related Links	http://dx.doi.org/10.1128/jvi.76.17.8797-8807.2002
Ending Page	8807
Page Count	11
Starting Page	8797
File Format	PDF
ISSN	0022538X
e-ISSN	10985514
Journal	Journal of Virology
Issue Number	17
Volume Number	76
Language	English
Publisher	American Society for Microbiology
Publisher Date	2002-09-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Virology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Virology Immunology Microbiology Insect Science

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