188609-44-1

Basic information

• Product Name: C₁₃H₂₂N₄O₈SSe
• Synonyms: C₁₃H₂₂N₄O₈SSe
• CAS NO: 188609-44-1
• Molecular Weight: 473.366
• Mol File: 188609-44-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: C₁₃H₂₂N₄O₈SSe(CAS DataBase Reference)
• NIST Chemistry Reference: C₁₃H₂₂N₄O₈SSe(188609-44-1)
• EPA Substance Registry System: C₁₃H₂₂N₄O₈SSe(188609-44-1)

Safety Data

• Hazardous Substances Data: 188609-44-1(Hazardous Substances Data)

Upstream product

• 1464-43-3 seleno-L-cystine 
• 70-18-8 GLUTATHIONE 

Relevant articles and documents

Role of substrate reactivity in the glutathione peroxidase (gpx) activity of selenocystine

Selenocystine (CysSeSeCys), a diselenide, exhibits glutathione peroxidase (GPx) activity, where it catalyses the reduction of hydroperoxides using a thiol co-factor. To understand the relative reactivity of the two substrates, enzymekinetic parameters, i.e., the turnover number (kcat) and the relative reactivity parameters toward thiol (φG) and hydroperoxide (H), were determined by applying Dalziel kinetics for a bi-substrate model in the presence of hydrogen peroxide (H2O 2), t-butyl hydroperoxide, or α-cumyl hydroperoxide and glutathione or dithiothreitol (DTTred). The intermediates formed during the reaction of CysSeSeCys with H2O2 and DTT red were characterized by 77SeNMR spectroscopy. Ab initio calculation at HF/6-31G(d) indicated that the reactions with H2O2 are exothermic, while those with DTTred are endothermic. Based on these studies, the GPx activity of CysSeSeCys is likely to be initiated by the reaction with hydroperoxide and in the catalytic cycle, the reaction with thiol is the rate-determining step.