Mapping the Sites of Interaction between SecY and SecE by Cysteine Scanning Mutagenesis*
Mapping the Sites of Interaction between SecY and SecE by Cysteine Scanning Mutagenesis*
复制标题
通过半胱氨酸扫描诱变绘制 SecY 和 SecE 之间的相互作用位点*
DOI:
--
复制
发表时间:
2001
影响因子:
4.8
通讯作者:
A. Driessen
中科院分区:
文献类型:
--
作者:
A. Veenendaal;C. van der Does;A. Driessen
In Escherichia coli, the SecYEG complex mediates the translocation and membrane integration of proteins. Both genetic and biochemical data indicate interactions of several transmembrane segments (TMSs) of SecY with SecE. By means of cysteine scanning mutagenesis, we have identified intermolecular sites of contact between TMS7 of SecY and TMS3 of SecE. The cross-linking of SecY to SecE demonstrates that these subunits are present in a one-to-one stoichiometry within the SecYEG complex. Sites in TMS3 of SecE involved in SecE dimerization are confined to a specific α-helical interface and occur in an oligomeric SecYEG complex. Although cross-linking reversibly inactivates translocation, the contact between TMS7 of SecY and TMS3 of SecE remains unaltered upon insertion of the preprotein into the translocation channel. These data support a model for an oligomeric translocation channel in which pairs of SecYEG complexes contact each other via SecE.
登录
查看更多内容
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:
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
影响因子:
56.9
作者:
Beckmann, R;Bubeck, D;Frank, J
通讯作者:
Frank, J
DOI:
10.1073/pnas.85.23.8978
发表时间:
1988
影响因子:
11.1
作者:
Weiss,JB;Ray,PH;BassfordJr,PJ
通讯作者:
BassfordJr,PJ