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001-es BibID:	BIBFORM046862
Első szerző:	Penyige András (molekuláris genetikus)
Cím:	Modification of Glutamine Synthetase in Streptomyces griseus by ADP-Ribosylation and Adenylylation / Penyige, A., Kalmanczhelyi, A., Sipos, A., Ensign, J. C., Barabas, G.
Dátum:	1994
ISSN:	0006-291X
Megjegyzések:	Addition of NH+4 to Streptomyces griseus 2682 cells grown in NO?3 containing medium resulted in a rapid decline in glutamine synthetase activity due to covalent modification of the enzyme. The NH+4 promoted inactivation of the enzyme was inhibited by the ADP-ribosyltransferase inhibitor 3-methoxybenzamide. In the presence of ADP-ribosyltransferase activity the purified glutamine synthetase was also inhibited by NAD+ in a concentration-dependent manner. ADP-ribosylation of glutamine synthetase was demonstrated in vitro by showing the incorporation of labeled ADP-ribose from [?-32P]NAD+ into glutamine synthetase subunits. Beside ADP-ribosylation, adenylylation of glutamine synthetase was also shown in S. griseus since phosphodiesterase I treatment reactivated the enzyme in crude extracts of NH+4-shocked cells. Glutamine synthetase was also inhibited and modified by ATP in crude cellular extracts. These results suggest that in S. griseus 2682 ADP-ribosylation of glutamine synthetase could be an alternative modification to adenylylation to regulate glutamine synthetase activity.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Biochemical And Biophysical Research Communications. - 204 : 2 (1994), p. 598-605. -
További szerzők:	Kálmánczhelyi Attila Sipos Anikó Ensign, J. C. Barabás György (1933-) (sejtbiológus, molekuláris genetikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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