Insertion of the Polytopic Membrane Protein MalF Is Dependent on the Bacterial Secretion Machinery (*)
Insertion of the Polytopic Membrane Protein MalF Is Dependent on the Bacterial Secretion Machinery (*)
复制标题
多位膜蛋白 MalF 的插入取决于细菌分泌机制 (*)
DOI:
--
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发表时间:
1996
影响因子:
4.8
通讯作者:
Christopher Murphy
中科院分区:
文献类型:
--
作者:
B. Traxler;Christopher Murphy
We examined the dependence of protein export and membrane protein insertion on SecE and SecA, two components of the secretion (Sec) apparatus of Escherichia coli. The magnitude of the secretion defect observed for signal sequence-containing proteins in cells depleted of SecE is larger and more general than that in many temperature- or cold-sensitive Sec mutants. In addition, we show that the proper insertion of the polytopic MalF protein (synthesized without a signal sequence) into the cytoplasmic membrane is also SecE-dependent. In contrast to an earlier study (McGovern, K., and Beckwith, J.(1991) J. Biol. Chem. 266, 20870-20876), the membrane insertion of MalF also is inhibited by treatment of cells with sodium azide, a potent inhibitor of SecA. Therefore, our data strongly suggest that the cytoplasmic membrane insertion of MalF is dependent on the same cellular machinery as is involved in the export of signal sequence-containing proteins. We propose that the mechanism of export from the cytoplasm is related for both signal sequence-containing and cytoplasmic membrane proteins, but hydrophobic membrane proteins such as MalF may have a higher affinity for the Sec apparatus.
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DOI:
10.1073/pnas.87.21.8227
发表时间:
1990-11-01
影响因子:
11.1
作者:
OLIVER, DB;CABELLI, RJ;JAROSIK, GP
通讯作者:
JAROSIK, GP
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Werner,PK;SaierJr,MH;Müller,M
通讯作者:
Müller,M
DOI:
10.1002/j.1460-2075.1991.tb07699.x
发表时间:
1991
期刊:
The EMBO journal
影响因子:
--
作者:
Schatz,PJ;Bieker,KL;Ottemann,KM;Silhavy,TJ;Beckwith,J
通讯作者:
Beckwith,J
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
McGovern,K;Beckwith,J
通讯作者:
Beckwith,J
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Seligman,L;Manoil,C
通讯作者:
Manoil,C