{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,30]],"date-time":"2025-09-30T10:37:42Z","timestamp":1759228662077,"version":"3.41.2"},"reference-count":37,"publisher":"American Society for Microbiology","issue":"4","license":[{"start":{"date-parts":[[2017,3,24]],"date-time":"2017-03-24T00:00:00Z","timestamp":1490313600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2017,4,1]],"date-time":"2017-04-01T00:00:00Z","timestamp":1491004800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"funder":[{"name":"SNSF Foundation","award":["310030_162603"],"award-info":[{"award-number":["310030_162603"]}]},{"name":"SNSF Foundation","award":["310030_165825"],"award-info":[{"award-number":["310030_165825"]}]}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[2017,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            Lausannevirus belongs to the family\n            <jats:named-content content-type=\"genus-species\">Marseilleviridae<\/jats:named-content>\n            within the group of nucleocytoplasmic large DNA viruses (NCLDVs). These giant viruses exhibit unique features, including a large genome, ranging from 100 kb to 2.5 Mb and including from 150 to more than 2,500 genes, as well as the presence of genes coding for proteins involved in transcription and translation. The large majority of Lausannevirus open reading frames have unknown functions. Interestingly, a bifunctional dihydrofolate reductase-thymidylate synthase (DHFR-TS) is encoded in the Lausannevirus genome. The enzyme plays central roles in DNA precursor biosynthesis. DHFR is the pharmacological target of antifolates, such as trimethoprim, pyrimethamine, and proguanil. First, the functionality of Lausannevirus DHFR-TS was demonstrated by the successful complementation of a DHFR-deficient\n            <jats:named-content content-type=\"genus-species\">Saccharomyces cerevisiae<\/jats:named-content>\n            strain with a plasmid expressing the heterologous gene. Additionally, using this heterologous expression system, we demonstrated the\n            <jats:italic>in vitro<\/jats:italic>\n            susceptibility of Lausannevirus DHFR-TS to proguanil and its resistance to pyrimethamine and trimethoprim. Proguanil may provide a unique and useful treatment if Lausannevirus proves to be a human pathogen. To our knowledge, this is the first time that a DHFR-TS has been described and characterized in an NCLDV.\n          <\/jats:p>","DOI":"10.1128\/aac.02573-16","type":"journal-article","created":{"date-parts":[[2017,1,31]],"date-time":"2017-01-31T02:50:39Z","timestamp":1485831039000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":4,"title":["Lausannevirus Encodes a Functional Dihydrofolate Reductase Susceptible to Proguanil"],"prefix":"10.1128","volume":"61","author":[{"given":"L.","family":"Mueller","sequence":"first","affiliation":[{"name":"Institute of Microbiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P. 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