Abstract
The kinetic properties of Escherichia coli glutamine synthetase are markedly influenced by the manner in which the organism is grown. Enzyme obtained from stationary-phase cells grown on glycerol and glutamate is strongely inhibited by each of the eight feedback effectors known to influence this enzyme; however, the enzyme from log-phase cells grown on glucose and growth-limiting concentrations of NH 4 Cl is stimulated by some of these effectors. Of the growth variables examined, nitrogen source and time of harvest were the most important; carbon source and aeration seemed to have no effect. Two purified enzyme preparations have been obtained from cells grown under two different conditions, designated enzymes I and II for convenience. Enzyme I is stimulated by adenosine 5′-monophosphate, histidine, and tryptophan in the transfer assay, whereas enzyme II is strongly inhibited by all effectors tested. Enzyme I has a higher specific activity in the forward assay in the presence of Mg ++ or Co ++ , whereas enzyme II is more active in the presence of Mn ++ .
References
9
Referenced
58
-
DAVIS , B. J. 1964 . Disc electrophoresis-IT. Method and application to human serum proteins . Ann. N. Y. Acad. Sci. 121 : 404 - 427 .
(
10.1111/j.1749-6632.1964.tb14213.x
) / Ann. N. Y. Acad. Sci. / Disc electrophoresis-IT. Method and application to human serum proteins by DAVIS B. J. (1964) -
GORNALL , A. G. , C. J. BARDAWILL , A ND M . M. DAVID. 1949 . Determination of serum proteins by means of the biuret reaction . J. Biol. Chem. 177 : 751 - 766 .
(
10.1016/S0021-9258(18)57021-6
) / J. Biol. Chem. / Determination of serum proteins by means of the biuret reaction by GORNALL A. G. (1949) -
KINGDON , H. S. , AND E. R. STADTMAN , 1967 . Two E. coli glutamine synthetases with different sensitivities to feedback effectors . Biochem. Biophys. Res. Commun. 27 : 470 - 473 .
(
10.1016/S0006-291X(67)80008-1
) / Biochem. Biophys. Res. Commun. / Two E. coli glutamine synthetases with different sensitivities to feedback effectors by KINGDON H. S. (1967) - LEVIN r OW, L . 1954 . The glutamyltransferase activity of normal and neoplastic tissues . J. Natl. Cancer Inst. 15 : 347 - 352 . / J. Natl. Cancer Inst. / The glutamyltransferase activity of normal and neoplastic tissues by LEVIN OW, L (1954)
- MECKE D. K. WULFF AND H. HOLZER. 1966. 957
-
STADTMAN , E. R. , G. N. COHEN , G. LEBRAS , A ND H . DE ROBICHON-SZULMAJSTER . 1961 . Feed-back inhibition and repression of aspartokinase activity in Escherichia coli and Saccharomyces cerevisiae . J. Biol. Chem. 236 : 2033 - 2038 .
(
10.1016/S0021-9258(18)64125-0
) / J. Biol. Chem. / Feed-back inhibition and repression of aspartokinase activity in Escherichia coli and Saccharomyces cerevisiae by STADTMAN E. R. (1961) - WOOLFOLK , C. A. , B. SHAPIRO , A ND E . R. STADTMAN. 1966 . Regulation of glutamine synthetase. I. Purification and properties of glutamine synthetase from Escherichia coli . Arch. Biochem. Biophys. 116 : 177 - 192 . / Arch. Biochem. Biophys. / Regulation of glutamine synthetase. I. Purification and properties of glutamine synthetase from Escherichia coli by WOOLFOLK C. A. (1966)
-
WOOLFOLK , C. A. , AND E. R. STADTMAN. 1964 . Cumulative feedback inhibition in the multiple end product regulation of glutamine synthetase activity in Escherichia coli . Biochem. Biophys. Res. Commun. 17 : 313 - 319 .
(
10.1016/0006-291X(64)90003-8
) / Biochem. Biophys. Res. Commun. / Cumulative feedback inhibition in the multiple end product regulation of glutamine synthetase activity in Escherichia coli by WOOLFOLK C. A. (1964) - WOOLFOLK , C. A. , AND E. R. STADTMAN. 1967 . Regulation of glutamine synthetase. III. Cumulative feedback inhibition of glutamine synthetase from Escherichia coli . Arch. Biochem. Biophys. 118 : 736 - 755 . / Arch. Biochem. Biophys. / Regulation of glutamine synthetase. III. Cumulative feedback inhibition of glutamine synthetase from Escherichia coli by WOOLFOLK C. A. (1967)
Dates
Type | When |
---|---|
Created | 5 years, 7 months ago (Jan. 4, 2020, 9:02 p.m.) |
Deposited | 4 years, 2 months ago (June 12, 2021, 6:55 a.m.) |
Indexed | 2 days, 5 hours ago (Aug. 30, 2025, 12:28 p.m.) |
Issued | 57 years, 11 months ago (Oct. 1, 1967) |
Published | 57 years, 11 months ago (Oct. 1, 1967) |
Published Print | 57 years, 11 months ago (Oct. 1, 1967) |
@article{Kingdon_1967, title={Regulation of Glutamine Synthetase X. Effect of Growth Conditions on the Susceptibility of Escherichia coli Glutamine Synthetase to Feedback Inhibition}, volume={94}, ISSN={1098-5530}, url={http://dx.doi.org/10.1128/jb.94.4.949-957.1967}, DOI={10.1128/jb.94.4.949-957.1967}, number={4}, journal={Journal of Bacteriology}, publisher={American Society for Microbiology}, author={Kingdon, Henry S. and Stadtman, E. R.}, year={1967}, month=oct, pages={949–957} }