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Program of Xi\u2019an City","award":["2023-YBSF-107"],"award-info":[{"award-number":["2023-YBSF-107"]}]},{"name":"Science and Technology Program of Xi\u2019an City","award":["2024NC-YBXM-187"],"award-info":[{"award-number":["2024NC-YBXM-187"]}]},{"name":"Science and Technology Program of Xi\u2019an City","award":["2023-JC-QN-0244"],"award-info":[{"award-number":["2023-JC-QN-0244"]}]},{"name":"Science and Technology Program of Xi\u2019an City","award":["24KGDW0007"],"award-info":[{"award-number":["24KGDW0007"]}]},{"name":"Science and Technology Program of Xi\u2019an City","award":["24GXFW0081-09"],"award-info":[{"award-number":["24GXFW0081-09"]}]},{"name":"Science and Technology Program of Xi\u2019an City","award":["22GXFW0137"],"award-info":[{"award-number":["22GXFW0137"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Human cysteine desulfurase (NFS1) participates in numerous critical cellular processes, including iron\u2013sulfur (Fe-S) cluster biosynthesis and tRNA thiolation. NFS1 overexpression has been observed in a variety of cancers, and thus it has been considered a promising anti-tumor therapeutic target. To date, however, no inhibitors targeting NFS1 have been identified. Here, we report the identification of the first potent small-molecule inhibitor (Compound 53, PubChem CID 136847320) of NFS1 through a combination of virtual screening and biological validation. Compound 53 exhibited good selectivity against two other pyridoxal phosphate (PLP)-dependent enzymes. Treatment with Compound 53 inhibited the proliferation of lung cancer (A549) cells (IC50 = 16.3 \u00b1 1.92 \u03bcM) and caused an increase in cellular iron levels due to the disruption of Fe-S cluster biogenesis. Furthermore, Compound 53, in combination with 2-AAPA, an inhibitor of glutathione reductase (GR) that elevates cellular reactive oxygen species (ROS) levels, further suppressed the proliferation of A549 cells by triggering ferroptotic cell death. Additionally, the key residues involved in the binding of the inhibitor to the active center of NFS1 were identified through a combination of molecular docking and site-directed mutagenesis. Taken together, we describe the identification of the first selective small-molecule inhibitor of human NFS1.<\/jats:p>","DOI":"10.3390\/ijms26062782","type":"journal-article","created":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T05:03:59Z","timestamp":1742447039000},"page":"2782","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Identification of a Selective Inhibitor of Human NFS1, a Cysteine Desulfurase Involved in Fe-S Cluster Assembly, via Structure-Based Virtual Screening"],"prefix":"10.3390","volume":"26","author":[{"given":"Zhilong","family":"Zhu","sequence":"first","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haisheng","family":"Gan","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanxiong","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guanya","family":"Jia","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heng","family":"Li","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiwei","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoya","family":"Shang","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weining","family":"Niu","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1534","DOI":"10.1021\/acschembio.3c00147","article-title":"Direct cysteine desulfurase activity determination by NMR and the study of the functional role of key structural elements of human NFS1","volume":"18","author":"Sewell","year":"2023","journal-title":"ACS. 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