Effects of Carbon Source on Expression of Fo Genes and on the Stoichiometry of the c Subunit in the F1Fo ATPase of Escherichia coli
Effects of Carbon Source on Expression of Fo Genes and on the Stoichiometry of the c Subunit in the F1Fo ATPase of Escherichia coli
复制标题
碳源对大肠杆菌Fo基因表达及F1Fo ATP酶c亚基化学计量的影响
作者:
R. A. Schemidt;J. Qu;James R. Williams;W. Brusilow
ABSTRACT Expression of the genes for the membrane-bound Fosector of the Escherichia coli F1Foproton-translocating ATPase can respond to changes in metabolic conditions, and these changes are reflected in alterations in the subunit stoichiometry of the oligomeric Fo proton channel. Transcriptional and translational lacZ fusions to the promoter and to two Fo genes show that, during growth on the nonfermentable carbon source succinate, transcription of the operon and translation of uncB, encoding the a subunit of Fo, are higher than during growth on glucose. In contrast, translation of the uncE gene, encoding the c subunit of Fo, is higher during growth on glucose than during growth on succinate. Translation rates of both uncB anduncE change as culture density increases, but transcription rates do not. Quantitation of the c stoichiometry shows that more c subunits are assembled into the F1Fo ATPase in cells grown on glucose than in cells grown on succinate. E. coli therefore appears to have a mechanism for regulating the composition and, presumably, the function of the ATPase in response to metabolic circumstances.
登录
查看更多内容
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Solomon,KA;Brusilow,WS
通讯作者:
Brusilow,WS
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hermolin,J;Fillingame,RH
通讯作者:
Fillingame,RH
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Foster,DL;Fillingame,RH
通讯作者:
Fillingame,RH
DOI:
10.1073/pnas.92.24.10964
发表时间:
1995-11-21
影响因子:
11.1
作者:
DUNCAN, TM;BULYGIN, VV;CROSS, RL
通讯作者:
CROSS, RL
DOI:
10.1006/abbi.1995.0063
发表时间:
1995
期刊:
Archives of biochemistry and biophysics.
影响因子:
--
作者:
Schemidt,RA;Hsu,DK;Deckers-Hebestreit,G;Altendorf,K;Brusilow,WS
通讯作者:
Brusilow,WS