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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":["23GXFW0081-05"],"award-info":[{"award-number":["23GXFW0081-05"]}]},{"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":["Antioxidants"],"abstract":"<jats:p>Cystathionine \u03b3-lyase (CSE) is the second enzyme in the trans-sulfuration pathway that converts cystathionine to cysteine. It is also one of three major enzymes responsible for the biosynthesis of hydrogen sulfide (H2S). CSE is believed to be the major source of endogenous H2S in the cardiovascular system, and the CSE\/H2S system plays a crucial role in a variety of physiological and pathological processes. However, the regulatory mechanism of the CSE\/H2S system is less well understood, especially at the post-translational level. Here, we demonstrated that the persulfidation of CSE inhibits its activity by ~2-fold in vitro. The loss of this post-translational modification in the presence of dithiothreitol (DTT) results in a reversal of basal activity. Cys137 was identified as the site for persulfidation by combining mass spectrometry, mutagenesis, activity analysis and streptavidin\u2013biotin pull-down assays. To test the physiological relevance of the persulfidation regulation of CSE, human aortic vascular smooth muscle cells (HA-VSMCs) were incubated with vascular endothelial growth factor (VEGF), which is known to enhance endogenous H2S levels. Under these conditions, consistent with the change tendency of the cellular H2S level, the CSE persulfidation levels increased transiently and then gradually decreased to the basal level. Collectively, our study revealed a negative feedback regulation mechanism of the CSE\/H2S system via the persulfidation of CSE and demonstrated the potential for maintaining cellular H2S homeostasis under oxidative stress conditions, particularly in tissues where CSE is a major source of H2S.<\/jats:p>","DOI":"10.3390\/antiox13111402","type":"journal-article","created":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T05:36:45Z","timestamp":1731908205000},"page":"1402","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Persulfidation of Human Cystathionine \u03b3-Lyase Inhibits Its Activity: A Negative Feedback Regulation Mechanism for H2S Production"],"prefix":"10.3390","volume":"13","author":[{"given":"Guanya","family":"Jia","sequence":"first","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":"Haisheng","family":"Gan","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":"Zhilong","family":"Zhu","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":"Yongyi","family":"Ye","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":[[2024,11,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1016\/j.redox.2012.11.006","article-title":"Redox biology of hydrogen sulfide: Implications for physiology, pathophysiology, and pharmacology","volume":"1","author":"Stein","year":"2013","journal-title":"Redox Biol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"5501","DOI":"10.1111\/bph.12900","article-title":"Emerging role of hydrogen sulfide in hypertension and related cardiovascular diseases","volume":"172","author":"Meng","year":"2015","journal-title":"Br. 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