Cited by 44Sulfur Compounds in BiologyNitric Oxide and Endothelin EffectsFolate and B Vitamins Research

Nitrite Reductase Activity and Inhibition of H2S Biogenesis by Human Cystathionine ß-Synthase

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Gherasim, Carmen, Yadav, Pramod K., Kabil, Omer, Niu, Wei-Ning, Banerjee, Ruma·2014·PLoS ONE

Abstract

Nitrite was recognized as a potent vasodilator >130 years and has more recently emerged as an endogenous signaling molecule and modulator of gene expression. Understanding the molecular mechanisms that regulate nitrite metabolism is essential for its use as a potential diagnostic marker as well as therapeutic agent for cardiovascular diseases. In this study, we have identified human cystathionine ß-synthase (CBS) as a new player in nitrite reduction with implications for the nitrite-dependent control of H₂S production. This novel activity of CBS exploits the catalytic property of its unusual heme cofactor to reduce nitrite and generate NO. Evidence for the possible physiological relevance of this reaction is provided by the formation of ferrous-nitrosyl (Fe(II)-NO) CBS in the presence of NADPH, the human diflavin methionine synthase reductase (MSR) and nitrite. Formation of Fe(II)-NO CBS via its nitrite reductase activity inhibits CBS, providing an avenue for regulating biogenesis of H₂S and cysteine, the limiting reagent for synthesis of glutathione, a major antioxidant. Our results also suggest a possible role for CBS in intracellular NO biogenesis particularly under hypoxic conditions. The participation of a regulatory heme cofactor in CBS in nitrite reduction is unexpected and expands the repertoire of proteins that can liberate NO from the intracellular nitrite pool. Our results reveal a potential molecular mechanism for cross-talk between nitrite, NO and H₂S biology.

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  1. [45]Chiku T, Padovani D, Zhu W, Singh S, Vitvitsky V, et al (2009) H2S biogenesis by human cystathionine gamma-lyase leads to the novel sulfur metabolites lanthionine and homolanthionine and is responsive to the grade of hyperhomocysteinemia. J Biol Chem 284: 11601– 11612. 19261609 PMC2670165

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Authors
Gherasim, C., Yadav, P. K., Kabil, O., Niu, W.-N., & Banerjee, R.
Affiliations
  • University of Michigan (US)
  • Northwestern Polytechnical University (CN)
Corresponding author
Banerjee, Ruma
Venue
PLoS ONE
Published
2014-01-08
Volume
9
Issue
1
Pages
e85544
ISSN
1932-6203 (ISSN-L)
OpenAlex
W1979659625
Cited by
44
References
62
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 5 · 2019: 1 · 2018: 3 · 2017: 8 · 2016: 4 · 2015: 1 · 2014: 6
FWCI
2.82
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL58984, R01HL058984)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Sulfur Compounds in Biology
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Rheumatology › Folate and B Vitamins Research
Keywords
cystathionine beta-synthase, nitrite reductase activity, nitric oxide production, heme cofactor, nitrite metabolism, methionine synthase reductase, cysteine biosynthesis, glutathione, hypoxia
MeSH terms
Cystathionine beta-Synthase, Electron Spin Resonance Spectroscopy, Heme, Humans, Hydrogen Sulfide, Iron, Models, Biological, Nitric Oxide, Nitrite Reductases, Nitrites, Oxidation-Reduction, Pyridoxal Phosphate, Reducing Agents

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