Intermediates and enzymes between alpha-ketoarginine and gamma-guanidinobutyrate in the L-arginine catabolic pathway of Pseudomonas putida.

Nitrogen metabolism in Methanobacterium thermoautotrophicum: a solution and solid-state nitrogen-15 NMR study

“…The transamination pathway d, however, removes the «-amino nitrogen from arginine. Thus, in early stationary (36 h) or stationary-phase (60 h) cells, catabolism of arginine is initiated by transamination, leaving the guanidino group intact and producing -ketoarginine or 7-guanidinobutyrate as is the case for Pseudomonas putida (Vanderbilt et al, 1975). An NMR distinction between these various guanidino species cannot be made, since it was found that the l5N chemical shifts of the , ' and nitrogens in -guanidinobutyrate were exactly the same as those for arginine, and therefore presumably for a-ketoarginine.…”