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- W1966175295 abstract "We obtained a novel carbohydrate-binding peptide having a helix−loop−helix scaffold from a random peptide library. The helix−loop−helix peptide library randomized at five amino acid residues was displayed on the major coat protein of a filamentous phage. Affinity selection with a ganglioside, Galβ1−3GalNAcβ1−4(Neu5Acα2−3)Galβ1−4Glcβ1−1′Cer (GM1), gave positive phage clones. Surface plasmon resonance spectroscopy showed that a corresponding 35-mer synthetic peptide had high affinity for GM1 with a dissociation constant of 0.24 µM. This peptide preferentially binds to GM1 rather than asialo GM1 and GM2, suggesting that a terminal galactose and sialic acid are required for the binding as for cholera toxin. Circular dichroism spectroscopic studies indicated that a helical structure is important for the affinity and specificity. Furthermore, alanine scanning at randomized positions showed that arginine and phenylalanine play an especially important role in the recognition of carbohydrates. Such a de novo helix−loop−helix peptide would be available for the design of carbohydrate-binding proteins." @default.
- W1966175295 created "2016-06-24" @default.
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- W1966175295 date "2008-06-10" @default.
- W1966175295 modified "2023-10-17" @default.
- W1966175295 title "Selection of a Carbohydrate-Binding Domain with a Helix−Loop−Helix Structure" @default.
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- W1966175295 doi "https://doi.org/10.1021/bi8000837" @default.
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