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. 2004 Apr 26;165(2):213–222. doi: 10.1083/jcb.200402100

Figure 3.

Figure 3.

YidC alone is sufficient to catalyze the membrane insertion of F0c into proteoliposomes. (A) Co-translational F0c insertion as well as post-translational proOmpA translocation reactions were performed in the presence of the indicated amounts of (proteo-)liposomes reconstituted with YidC and SecYEG (YidC/SecYEG), YidC alone, SecYEG alone, or without any proteins (−). (B) F0c insertion efficiency at different (proteo-)liposome concentrations was quantified from the amount of protease-protected material in the presence of SecYEG/YidC (▪), YidC (○), SecYEG (□), or protein-free (•) liposomes. The amount of F0c synthesized was comparable in all reactions (not depicted) and was set as 100%. All data points shown in B are averages from five independent experiments in which proteoliposomes from three independent reconstitutions were used. Purified SecYEG and YidC were both used at a protein/lipid ratio of 1:100 (wt/wt).