{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T07:53:36Z","timestamp":1793087616005,"version":"4.5.0"},"reference-count":77,"publisher":"American Society for Microbiology","issue":"18","license":[{"start":{"date-parts":[[2012,9,15]],"date-time":"2012-09-15T00:00:00Z","timestamp":1347667200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Virol"],"published-print":{"date-parts":[[2012,9,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Efficient genetic modification of herpesviruses such as Kaposi's sarcoma-associated herpesvirus (KSHV) has come to rely on bacterial artificial chromosome (BAC) technology. In order to facilitate this approach, we generated a new KSHV BAC clone, called BAC16, derived from the rKSHV.219 virus, which stems from KSHV and Epstein-Barr virus-coinfected JSC1 primary effusion lymphoma (PEL) cells. Restriction enzyme and complete sequencing data demonstrate that the KSHV of JSC1 PEL cells showed a minimal level of sequence variation across the entire viral genome compared to the complete genomic sequence of other KSHV strains. BAC16 not only stably propagated in both\n                    <jats:named-content content-type=\"genus-species\">Escherichia coli<\/jats:named-content>\n                    and mammalian cells without apparent genetic rearrangements, but also was capable of robustly producing infectious virions (\u223c5 \u00d7 10\n                    <jats:sup>7<\/jats:sup>\n                    \/ml). We also demonstrated the utility of BAC16 by generating deletion mutants of either the K3 or K5 genes, whose products are E3 ligases of the membrane-associated RING-CH (MARCH) family. While previous studies have shown that individual expression of either K3 or K5 results in efficient downregulation of the surface expression of major histocompatibility complex class I (MHC-I) molecules, we found that K5, but not K3, was the primary factor critical for the downregulation of MHC-I surface expression during KSHV lytic reactivation or following\n                    <jats:italic>de novo<\/jats:italic>\n                    infection. The data presented here demonstrate the utility of BAC16 for the generation and characterization of KSHV knockout and mutant recombinants and further emphasize the importance of functional analysis of viral genes in the context of the KSHV genome besides the study of individual gene expression.\n                  <\/jats:p>","DOI":"10.1128\/jvi.01019-12","type":"journal-article","created":{"date-parts":[[2012,6,27]],"date-time":"2012-06-27T23:47:43Z","timestamp":1340840863000},"page":"9708-9720","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":381,"title":["Construction and Manipulation of a New Kaposi's Sarcoma-Associated Herpesvirus Bacterial Artificial Chromosome Clone"],"prefix":"10.1128","volume":"86","author":[{"given":"Kevin F.","family":"Brulois","sequence":"first","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heesoon","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"},{"name":"Department of Microbiology and Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amy Si-Ying","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Armin","family":"Ensser","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"},{"name":"Klinische und Molekulare Virologie, Virologisches Institut, Universit\u00e4tsklinikum Erlangen, Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lai-Yee","family":"Wong","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"},{"name":"Department of Microbiology and Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zsolt","family":"Toth","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sun Hwa","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hye-Ra","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"},{"name":"Department of Microbiology and Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinjong","family":"Myoung","sequence":"additional","affiliation":[{"name":"Novartis Institutes for Biomedical Research, Emeryville, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Don","family":"Ganem","sequence":"additional","affiliation":[{"name":"Novartis Institutes for Biomedical Research, Emeryville, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tae-Kwang","family":"Oh","sequence":"additional","affiliation":[{"name":"Division of Biosystems Research, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jihyun F.","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Biosystems Research, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shou-Jiang","family":"Gao","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae U.","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Keck School of 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