title: Reactions of essential sulfhydryl residues of dehydrogenases with nicotinamide-(S-methylmercury-thioinosine) dinucleotide.
abstract: Nicotinamide-(S-methylmercury-thioinosine) dinucleotide was formed by reaction of nicotinamide-(6-thiopurine) dinucleotide with methylmercury chloride.  The compound exhibits coenzyme properties in the test with LDH (Km=1.5 X 10(-4) M, Vmax=12500) and LADH (Km=1.7 X 10(-4) M, Vmax=27) and inactivates YADH and GAPDH. From incubations with LDH and LADH the mercury containing coenzyme could be regarded by column be qualified for the X-ray structure analysis of the coenzyme-enzyme complex for some dehyrogenases based on the proportion of the heavy metal.
mesh_terms: D000429:Alcohol Oxidoreductases / Q000378:metabolism*; D003067:Coenzymes; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000378:metabolism*; D007700:Kinetics; D007770:L-Lactate Dehydrogenase / Q000378:metabolism*; D009243:NAD / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000378:metabolism; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000378:metabolism*; D013438:Sulfhydryl Compounds / Q000378:metabolism*
chemical_list: D003067:Coenzymes; D009942:Organometallic Compounds; D013438:Sulfhydryl Compounds; D009243:NAD; D000429:Alcohol Oxidoreductases; D007770:L-Lactate Dehydrogenase; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases