期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 86, 期 17, 页码 11407-11418出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c00907
关键词
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2017-04233]
- Government of Ontario
The research reported the enantioselective synthesis of two small and environmentally sensitive fluorescent amino acids through alkylation, which exhibit a significant increase in fluorescence as environmental polarity decreases. One of these amino acids was successfully incorporated into a highly active analog of the cyclic lipopeptide antibiotic for probing its interaction with model liposomes, lipopolysaccharides, and live bacteria.
Environmentally sensitive fluorescent amino acids (FlAAs) have been used extensively to probe biological interactions. However, most of these amino acids are large and do not resemble amino acid side chains. Here, we report the enantioselective synthesis of two small and environmentally sensitive fluorescent amino acids bearing 7-dialkylaminocoumarin side chains by alkylation of a Ni(II) glycine Schiff base complex. These amino acids exhibit a large increase in fluorescence as environment polarity decreases. One of these FLAAs was incorporated into a highly active analog of the cyclic lipopeptide antibiotic paenibacterin by Fmoc solid-phase peptide synthesis via a new and very efficient route. This peptide was used to probe the interaction of the antibiotic with model liposomes, lipopolysaccharides, and live bacteria.
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