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Enzymes Without Borders: Mobilizing Substrates, Delivering Products

Many cellular reactions involve both hydrophobic and hydrophilic molecules that reside within the chemically distinct environments defined by the phospholipid-based membranes and the aqueous lumens of cytoplasm and organelles. Enzymes performing this type of reaction are required to access a lipophilic substrate located in the membranes and to catalyze its reaction with a polar, water-soluble compound. Here, we explore the different binding strategies and chemical tricks that enzymes have developed to overcome this problem. These reactions can be catalyzed by integral membrane proteins that channel a hydrophilic molecule into their active site, as well as by water-soluble enzymes that are able to capture a lipophilic substrate from the phospholipid bilayer. Many chemical and biological aspects of this type of enzymology remain to be investigated and will require the integration of protein chemistry with membrane biology.

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Resource Type: Journal article/Issue, Diagram
Audience Level: Undergraduate lower division 13-14, Undergraduate upper division 15-16, Graduate, Professional (degree program), Continuing education

Author and Copyright


Authors and Editors: Federico Forneris of Department of Genetics and Microbiology, University of Pavia, Andrea Mattevi of Department of Genetics and Microbiology, University of Pavia
Publisher: AAAS
Format: text/html
Copyright and other restrictions: Yes
Cost: No

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Collection:
American Association for the Advancement of Science


     
   

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