{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T19:58:48Z","timestamp":1789675128947,"version":"4.0.1"},"reference-count":69,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,10,22]],"date-time":"2021-10-22T00:00:00Z","timestamp":1634860800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["BR1730\/3-2"],"award-info":[{"award-number":["BR1730\/3-2"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Viruses"],"abstract":"<jats:p>Viral infection activates cellular antiviral defenses including programmed cell death (PCD). Many viruses, particularly those of the Herpesviridae family, encode cell death inhibitors that antagonize different forms of PCD. While some viral inhibitors are broadly active in cells of different species, others have species-specific functions, probably reflecting the co-evolution of the herpesviruses with their respective hosts. Human cytomegalovirus (HCMV) protein UL36 is a dual cell death pathway inhibitor. It blocks death receptor-dependent apoptosis by inhibiting caspase-8 activation, and necroptosis by binding to the mixed lineage kinase domain-like (MLKL) protein and inducing its degradation. While UL36 has been shown to inhibit apoptosis in human and murine cells, the specificity of its necroptosis-inhibiting function has not been investigated. Here we show that UL36 interacts with both human and murine MLKL, but has a higher affinity for human MLKL. When expressed by a recombinant mouse cytomegalovirus (MCMV), UL36 caused a modest reduction of murine MLKL levels but did not inhibit necroptosis in murine cells. These data suggest that UL36 inhibits necroptosis, but not apoptosis, in a species-specific manner, similar to ICP6 of herpes simplex virus type 1 and MC159 of molluscum contagiosum virus. Species-specific necroptosis inhibition might contribute to the narrow host range of these viruses.<\/jats:p>","DOI":"10.3390\/v13112134","type":"journal-article","created":{"date-parts":[[2021,10,25]],"date-time":"2021-10-25T21:44:31Z","timestamp":1635198271000},"page":"2134","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["Species-Specific Inhibition of Necroptosis by HCMV UL36"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4519-9415","authenticated-orcid":false,"given":"Elena","family":"Muscolino","sequence":"first","affiliation":[{"name":"Leibniz Institute for Experimental Virology (HPI), 20251 Hamburg, Germany"},{"name":"Molecular Virology Group, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, 08003 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudia","family":"Castiglioni","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Experimental Virology (HPI), 20251 Hamburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7737-3505","authenticated-orcid":false,"given":"Renke","family":"Brixel","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Experimental Virology (HPI), 20251 Hamburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8186-7594","authenticated-orcid":false,"given":"Giada","family":"Frascaroli","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Experimental Virology (HPI), 20251 Hamburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6078-5255","authenticated-orcid":false,"given":"Wolfram","family":"Brune","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Experimental Virology (HPI), 20251 Hamburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,22]]},"reference":[{"key":"ref_1","unstructured":"Fields, B.N., Knipe, D.M., and Howley, P.M. 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