Chapter title |
Probing Inner Membrane Protein Topology by Proteolysis
|
---|---|
Chapter number | 8 |
Book title |
Bacterial Protein Secretion Systems
|
Published in |
Methods in molecular biology, July 2017
|
DOI | 10.1007/978-1-4939-7033-9_8 |
Pubmed ID | |
Book ISBNs |
978-1-4939-7031-5, 978-1-4939-7033-9
|
Authors |
Maxence S. Vincent, Eric Cascales, Vincent, Maxence S., Cascales, Eric |
Editors |
Laure Journet, Eric Cascales |
Abstract |
Inner membrane proteins are inserted into the membrane via α-helices. These helices do not only constitute membrane anchors but may mediate specific interactions with membrane protein partners or participate in energetic processes. The number, location, and orientation of these helices is referred to as topology. Bitopic membrane proteins that consist of a single membrane-embedded domain connecting two soluble domains are distinguished from polytopic ones that consist of multiple membrane-spanning helices connected by extramembrane domains. Defining inner membrane protein topology could be achieved by different methods. Here we describe a protease accessibility assay that makes it possible to define topology based on digestion profiles. |
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