Study of Polytopic Membrane Protein Topological Organization as a Function of Membrane Lipid Composition

  • Mikhail Bogdanov
  • Philip N. Heacock
  • William Dowhan
Part of the Methods in Molecular Biology book series (MIMB, volume 619)


A protocol is described using lipid mutants and thiol-specific chemical reagents to study lipid-dependent and host-specific membrane protein topogenesis by the substituted-cysteine accessibility method as applied to transmembrane domains (SCAM™). SCAM™ is adapted to follow changes in membrane protein topology as a function of changes in membrane lipid composition. The strategy described can be adapted to any membrane system.

Key words

Membrane protein topology lipid-dependent topogenesis phospholipids lactose permease SCAM™ 



This work was supported by NIH grant GM20478 and funds from the John S. Dunn Foundation awarded to W. D.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Mikhail Bogdanov
    • 1
  • Philip N. Heacock
    • 1
  • William Dowhan
    • 1
  1. 1.Department of Biochemistry and Molecular BiologyUniversity of Texas Medical SchoolHoustonUSA

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