期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 277, 期 8, 页码 5715-5718出版社
ELSEVIER
DOI: 10.1074/jbc.C100683200
关键词
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The integration of the polytopic membrane protein YidC into the inner membrane of Escherichia coli was analyzed employing an in vitro system. Upon integration of in vitro synthesized YidC, a 42-kDa. membrane protected fragment was detected, which could be immunoprecipitated with polyclonal anti-YidC antibodies. The occurrence of this fragment is in agreement with the predicted topology of YidC and probably encompasses the first two transmembrane domains and the connecting 320-amino acid-long periplasmic loop. The integration of YidC was strictly dependent on the signal recognition particle and SecA. YidC could not be integrated in the absence of SecY, SecE, or SecG, suggesting that YidC, in contrast to its mitochondrial orthologue Oxalp, cannot engage a SecYEG-independent protein-conducting channel.
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