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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Buer, Benjamin C. Stuckey, Jeanne A. Meagher, Jennifer L. Marsh, E. Neil G. |
| Description | Author Affiliation: Buer BC ( Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.); |
| Abstract | Noncanonical amino acids have proved extremely useful for modifying the properties of proteins. Among them, extensively fluorinated (fluorous) amino acids seem particularly effective in increasing protein stability; however, in the absence of structural data, the basis of this stabilizing effect remains poorly understood. To address this problem, we solved X-ray structures for three small proteins with hydrophobic cores that are packed with either fluorocarbon or hydrocarbon side chains and compared their stabilities. Although larger, the fluorinated residues are accommodated within the protein with minimal structural perturbation, because they closely match the shape of the hydrocarbon side chains that they replace. Thus, stability increases seem to be better explained by increases in buried hydrophobic surface area that accompany fluorination than by specific fluorous interactions between fluorinated side chains. This finding is illustrated by the design of a highly fluorinated protein that, by compensating for the larger volume and surface area of the fluorinated side chains, exhibits similar stability to its nonfluorinated counterpart. These structure-based observations should inform efforts to rationally modulate protein function using noncanonical amino acids. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 13 |
| Volume Number | 109 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2012-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Halogenation Proteins Chemistry Metabolism Amino Acids Fluorocarbons Hydrophobic And Hydrophilic Interactions Models, Molecular Protein Stability Protein Structure, Secondary Structure-Activity Relationship Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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