The first synthesis of the gamma-aminobutyric acid (GABA)-containing cyclic heptapeptide unguisin A is reported, confirming the structure of this natural product. Macrocyclization of a flexible GABA-containing linear precursor is found to proceed rapidly and in good yield.
Stereoselective Fluorination Alters the Geometry of a Cyclic Peptide: Exploration of Backbone-Fluorinated Analogues of Unguisin A
作者:Xiang-Guo Hu、Donald S. Thomas、Renate Griffith、Luke Hunter
DOI:10.1002/anie.201403071
日期:2014.6.10
enhancing the efficiency of peptide cyclization, and for fine‐tuning the conformations of cyclicpeptides, are valuable from a drug development perspective. Herein stereoselectivefluorination is investigated as a new strategy for achieving these goals. Four vicinal difluorinated analogues of the natural cyclic heptapeptide unguisin A have been efficiently synthesized. The analogues are found to adopt dramatically
Biosynthetic Characterization, Heterologous Production, and Genomics-Guided Discovery of GABA-Containing Fungal Heptapeptides
作者:Xingxing Wei、Tsz Ki Chan、Che Tung Derek Kong、Yudai Matsuda
DOI:10.1021/acs.jnatprod.2c01065
日期:2023.2.24
Cyclic peptide unguisin A is an anion receptor with high affinity for phosphate and pyrophosphate
作者:A. Daryl Ariawan、James E. A. Webb、Ethan N. W. Howe、Philip A. Gale、Pall Thordarson、Luke Hunter
DOI:10.1039/c7ob00316a
日期:——
report. However, we find that 1 functions as a promiscuous host molecule in a variety of anion-binding interactions, with high affinity particularly for phosphate and pyrophosphate. We also show that a series of rigidified, backbone-fluorinated analogues of 1 displays altered affinity for chloride ions.
The first synthesis of the gamma-aminobutyric acid (GABA)-containing cyclic heptapeptide unguisin A is reported, confirming the structure of this natural product. Macrocyclization of a flexible GABA-containing linear precursor is found to proceed rapidly and in good yield.