Rapid topology mapping of Escherichia coli inner-membrane proteins by prediction and PhoA/GFP fusion analysis.

Drew, David; Sjöstrand, Dan; Nilsson, Johan; Urbig, Thomas; Chin, Chen-ni; de Gier, Jan-Willem; von Heijne, Gunnar · Proc Natl Acad Sci U S A · 2002

basic_science · Level V

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Abstract

We present an approach that allows rapid determination of the topology of Escherichia coli inner-membrane proteins by a combination of topology prediction and limited fusion-protein analysis. We derive new topology models for 12 inner-membrane proteins: MarC, PstA, TatC, YaeL, YcbM, YddQ, YdgE, YedZ, YgjV, YiaB, YigG, and YnfA. We estimate that our approach should make it possible to arrive at highly reliable topology models for roughly 10% of the approximately 800 inner-membrane proteins thought to exist in E. coli.

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