Functionalized Analogues of an Unnatural Amino Acid that Mimics a Tripeptide β-Strand
                                
                                    
                                        作者:Tatyana V. Khasanova、Omid Khakshoor、James S. Nowick                                    
                                    
                                        DOI:10.1021/ol8021897
                                    
                                    
                                        日期:2008.11.20
                                    
                                    This paper introduces polar and hydrophobic variants of the unnatural amino acid Hao, which mimics the hydrogen-bonding functionality of one edge of a beta-strand. In these variants, the methyl side chain of Hao is replaced with acidic, basic, and hydrophobic groups. These modifications can impart improved solubility and additional side-chain interactions to peptides containing Hao.