Selenomethionine is as a good substrate as methionine for bovine liver glutamine transaminase (E.C. 2.6.1.15). Almost identical Km values for methionine, selenomethionine, 4-methylthio-2-oxobutanoic acid and 4-methylseleno-2-oxobutanoic acid have been obtained. Like for other enzymes, also for glutamine transaminase the substitution of the sulfur atom in a substrate molecule by a selenium one does not appreciably affect the enzyme affinity. Glutamine transaminase may thus be involved in selenomethionine catabolism.
Selenomethionine as substrate for glutamine transaminase / Blarzino, Carla; Coccia, Raffaella; B., Pensa; Cini, Chiara; C. D., Marco. - In: BIOCHEMISTRY AND MOLECULAR BIOLOGY INTERNATIONAL. - ISSN 1039-9712. - STAMPA. - 32:(1994), pp. 79-86.
Selenomethionine as substrate for glutamine transaminase.
BLARZINO, Carla;COCCIA, Raffaella;CINI, Chiara;
1994
Abstract
Selenomethionine is as a good substrate as methionine for bovine liver glutamine transaminase (E.C. 2.6.1.15). Almost identical Km values for methionine, selenomethionine, 4-methylthio-2-oxobutanoic acid and 4-methylseleno-2-oxobutanoic acid have been obtained. Like for other enzymes, also for glutamine transaminase the substitution of the sulfur atom in a substrate molecule by a selenium one does not appreciably affect the enzyme affinity. Glutamine transaminase may thus be involved in selenomethionine catabolism.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.