{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T00:28:45Z","timestamp":1768523325453,"version":"3.49.0"},"reference-count":81,"publisher":"Portland Press Ltd.","issue":"20","license":[{"start":{"date-parts":[[2022,10,7]],"date-time":"2022-10-07T00:00:00Z","timestamp":1665100800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,10,28]]},"abstract":"<jats:p>Coronaviruses have been responsible for multiple challenging global pandemics, including coronavirus disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Papain-like protease (PLpro), one of two cysteine proteases responsible for the maturation and infectivity of SARS-CoV-2, processes and liberates functional proteins from the viral polyproteins and cleaves ubiquitin and ISG15 modifications to inhibit innate immune sensing. Consequently, PLpro is an attractive target for developing COVID-19 therapies. PLpro contains a zinc-finger domain important for substrate binding and structural stability. However, the impact of metal ions on the activity and biophysical properties of SARS-CoV-2 PLpro has not been comprehensively studied. Here, we assessed the impacts of metal ions on the catalytic activity of PLpro. Zinc had the largest inhibitory effect on PLpro, followed by manganese. Calcium, magnesium, and iron had smaller or no effects on PLpro activity. EDTA at a concentration of 0.5\u2005mM was essential for PLpro activity, likely by chelating trace metals that inhibit PLpro. IC50 values for ZnCl2, ZnSO4, and MnCl2 of 0.42\u2009\u00b1\u20090.02\u2005mM, 0.35\u2009\u00b1\u20090.01\u2005mM, and 2.6\u2009\u00b1\u20090.3\u2005mM were obtained in the presence of 0.5\u2005mM EDTA; in the absence of EDTA, the estimated IC50 of ZnCl2 was 14\u2005\u00b5M. Tryptophan intrinsic fluorescence analysis confirmed the binding of zinc and manganese to PLpro, and differential scanning calorimetry revealed that zinc but not manganese reduced \u0394Hcal of PLpro. The results of this study provide a reference for further work targeting PLpro to prevent and treat COVID-19.<\/jats:p>","DOI":"10.1042\/bcj20220380","type":"journal-article","created":{"date-parts":[[2022,10,7]],"date-time":"2022-10-07T10:47:31Z","timestamp":1665139651000},"page":"2175-2193","update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Therapeutic potential of metal ions for COVID-19: insights from the papain-like protease of SARS-CoV-2"],"prefix":"10.1042","volume":"479","author":[{"given":"Cameron Lee","family":"Shetler","sequence":"first","affiliation":[{"name":"1Science Division, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juliana C.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"1Science Division, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thyago H. S.","family":"Cardoso","sequence":"additional","affiliation":[{"name":"2G42 Healthcare, Omics Excellence Center, Masdar City, Abu Dhabi, United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edson M.A.","family":"Silva","sequence":"additional","affiliation":[{"name":"3Science Division, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nitin K.","family":"Saksena","sequence":"additional","affiliation":[{"name":"4IHES, Victoria University, Footscray Campus, Melbourne, Victoria, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6071-8581","authenticated-orcid":false,"given":"Wael M.","family":"Rabeh","sequence":"additional","affiliation":[{"name":"1Science Division, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"288","published-online":{"date-parts":[[2022,10,21]]},"reference":[{"key":"2023012415101148700_BCJ-2022-0380C1","volume-title":"World Health Organization Coronavirus (COVID-19) Dashboard","author":"WHO","year":"2022"},{"key":"2023012415101148700_BCJ-2022-0380C2","doi-asserted-by":"publisher","first-page":"270","DOI":"10.1038\/s41586-020-2012-7","article-title":"A pneumonia outbreak associated with a new coronavirus of probable bat origin","volume":"579","year":"2020","journal-title":"Nature"},{"key":"2023012415101148700_BCJ-2022-0380C3","doi-asserted-by":"publisher","first-page":"727","DOI":"10.1056\/NEJMoa2001017","article-title":"A novel coronavirus from patients with pneumonia in China, 2019","volume":"382","year":"2020","journal-title":"N. 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