Areas of Interest
Research Foci: Chemical biology of hydrogen sulfide signaling, regulation of mammalian sulfur metabolism in health and disease, structural enzymology of human B12 trafficking proteins.
Toxic at high concentrations, H2S is a signaling molecule produced by cells and modulates important physiological processes including blood pressure regulation, inflammation and neuoromodulation. Our laboratory is investigating the reaction mechanisms and regulation of enzymes involved in H2S biogenesis and its clearance via oxidation. In addition to the canonical mitochondrial sulfide oxidation pathway, we have recently discovered a new pathway for clearing H2S, which involves hemeproteins. We use a combination of spectroscopic (EPR, fluorescence), kinetic (stopped-flow spectroscopy) and cellular approaches to understand the mechanisms of catalysis and regulation of key enzymes involved in H2S homeostasis. The enzymes involved in sulfur metabolism are richly dependent on multiple B vitamins for their catalytic functions including vitamin B6, folic acid and B12. My laboratory is also studying the intricate network of chaperones that shepherd and tailor vitamin B12 from its point of entry into cells to its target enzymes and whose dysfunction lead to disease. We have been elucidating novel enzymatic functions of the individual proteins and the thermodynamics and kinetics of protein-protein interactions in the pathway that guide B12 delivery without dilution into the cellular milieu. Using a combination of structural, spectroscopic and kinetic approaches we are studying allosteric regulation in the trafficking pathway for cofactor delivery with high fidelity.
Honors & Awards
Merck Award, ASBMB, 2019
Associate Editor, Chemical Reviews, 2012–present
Associate Editor, Journal of Biological Chemistry, 2012–present
Elected Fellow, American Association for the Advancement of Science, 2011
Associate Chair, Department of Biological Chemistry, 2008–2019
Pfizer Award, American Chemical Society, 2001
Established Investigator, American Heart Association, 2000
Mobile loop dynamics in adenosyltransferase control binding and reactivity of coenzyme B12.
Mascarenhas R, Ruetz M, McDevitt L, Koutmos M, Banerjee R.
Proc Natl Acad Sci U S A. 2020; 117: 30412–22.
Chlorocob(II)alamin Formation Which Enhances the Thiol Oxidase Activity of the B12-Trafficking Protein CblC.
Li Z, Greenhalgh ED, Twahir UT, Kallon A, Ruetz M, Warncke K, Brunold TC, Banerjee R.
Inorg Chem. 2020; 59: 16065–72.
An Interprotein Co-S Coordination Complex in the B12-Trafficking Pathway.
Li Z, Mascarenhas R, Twahir UT, Kallon A, Deb A, Yaw M, Penner-Hahn J, Koutmos M, Warncke K, Banerjee R.
J Am Chem Soc. 2020; 142: 16334–45.
Dismantling and Rebuilding the Trisulfide Cofactor Demonstrates Its Essential Role in Human Sulfide Quinone Oxidoreductase.
Landry AP, Moon S, Bonanata J, Cho US, Coitiño EL, Banerjee R.
J Am Chem Soc. 2020; 142: 14295–306.
The human B12 trafficking protein CblC processes nitrocobalamin.
Mascarenhas R, Li Z, Gherasim C, Ruetz M, Banerjee R.
J Biol Chem. 2020; 295: 9630–40.
Thioredoxin regulates human mercaptopyruvate sulfurtransferase at physiologically relevant concentrations.
Yadav PK, Vitvitsky V, Carballal S, Seravalli J, Banerjee R.
J Biol Chem. 2020; 295: 6299–311.
Itaconyl-CoA Forms a Stable Biradical in Methylmalonyl-CoA Mutase and Derails Its Activity and Repair.
Ruetz M, Campanello GC, Purchal M, Shen H, McDevitt L, Gouda H, Wakabayashi S, Zhu J, Rubin EJ, Warncke K, Mootha VK, Koutmos M, Banerjee R.
Science. 2019; 366: 589–93.
Hydrogen Sulfide Oxidation by Sulfide Quinone Oxidoreductase.
Landry AP, Ballou DP, Banerjee R.
Chembiochem. 2020, in press.
Chemical Biology of H2S Signaling Through Persulfidation.
Filipovic MR, Zivanovic J, Alvarez B, Banerjee R.
Chem Rev. 2018; 118: 1253–1337.
Catalytic Promiscuity and Heme-Dependent Redox Regulation of H2S Synthesis.
Curr Opin Chem Biol. 2017; 37: 115–21.
For a list of publications from PubMed, click HERE