52370-58-8Relevant academic research and scientific papers
Synthesis of γ-Glutamyl L-3,4-Dihydroxyphenylalanine by γ-Glutamyltranspeptidase from Proteus mirabilis
Nakayama, Reiko,Kumagai, Hidehiko,Akashi, Shiro,Sugiura, Hiroyoshi,Tochikura, Tatsurokuro
, p. 1041 - 1046 (2007/10/02)
Synthesis of γ-glutamyl-L-3,4-dihydroxyphenylalanine from a γ-glutamyl donor (glutathione or glutamine) and DOPA (L-3,4-dihydroxyphenylalanine) was examined making use of the partially purified γ-glutamyltranspeptidase from a bacterium, Proteus mirabilis.The optimum pH for γ-glutamyl-DOPA synthesis from glutathione was 9.5 to 11 and the amount of peptide produced increased with the glutathione concentration.The best conditions for γ-glutamyl -DOPA synthesis were investigated and 13 mg/ml of γ-glutamyl-DOPA was synthesized with a yield of 6,7percent of the substrate,glutathione.The product was isolated from a large scale reaction mixture and the sructure determined by physicochemical analyses; PMR spectrometry, mass spectrometry and IR spectrometry,γ-Glutamyl-DOPA synthesis was also performed with glutamine as the γ-glutamyl donor.
