Synthesis of neoglycopeptides by chemoselective reaction of carbohydrates with peptides containing a novel N′-methyl-aminooxy amino acid
作者:Michael R Carrasco、Michael J Nguyen、Dawn R Burnell、Michael D MacLaren、Shawna M Hengel
DOI:10.1016/s0040-4039(02)01212-1
日期:2002.8
N′-methyl-aminooxy aminoacid has been designed, synthesized, and successfully incorporated into peptides using standard solid-phase peptidesynthesis procedures. Reaction of these peptides with native reducing sugars yields neoglycopeptides via a chemoselective reaction with the aminooxy side chains. The key feature of the new aminoacid is that it maintains attached sugars in their cyclicconformations and close
Labeled peptides, proteins and antibodies and processes and intermediates useful for their preparation
申请人:——
公开号:US20020055133A1
公开(公告)日:2002-05-09
The invention provides peptide synthons having protected functional groups for attachment of desired moieties (e.g. functional molecules or probes). Also provided are peptide conjugates prepared from such synthons, and synthon and conjugate preparation methods including procedures for identifying the optimum probe attachment site. Biosensors are provided having environmentally sensitive dyes that can locate specific biomolecules within living cells and detect chemical and physiological changes in those biomolecules as the living cell is moving, metabolizing and reacting to its environment. Methods are included for detecting GTP activation of a Rho GTPase protein using polypeptide biosensors. When the biosensor binds GTP-activated Rho GTPase protein, the environmentally sensitive dye emits a signal of a different lifetime, intensity or wavelength than when not bound. New fluorophores whose fluorescence responds to environmental changes are also provided that have improved detection and attachment properties, and that can be used in living cells, or in vitro.