Abstract
α-Galactosyl epitopes are carbohydrate structures bearing a Galα1-3Galβ terminus. The interaction of these epitopes on the surface of animal cells with anti-α-galactosyl antibodies in human serum is believed to be the main cause in antibody-mediated hyperacute rejection in xenotransplantation. This report describes an efficient chemoenzymatic approach based on the use of recombinant α(1→3)-galactosyltransferase (α13-GalT) for the synthesis of xenoactive α-galactosyl epitopes, which are highly desired in the research of xenotransp]antation and immunotherapy. A truncated bovine α1,3-GalT (80-368) was cloned into the pET15b vector and subsequently transformed into E. coli BL21 strain. This expression system efficiently produced the soluble recombinant enzyme on a large scale with highly specific activity. A variety of α(1→3)-galactosylated epitopes were synthesized using such a recombinant enzyme. In a unique fashion, α-galactosyl pentasaccharide was synthesized via a one-pot, two-step enzymatic synthesis with in situ cofactor regeneration.
Original language | English (US) |
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Pages (from-to) | 6635-6638 |
Number of pages | 4 |
Journal | Journal of the American Chemical Society |
Volume | 120 |
Issue number | 27 |
DOIs | |
State | Published - Jul 15 1998 |
Externally published | Yes |
ASJC Scopus subject areas
- Chemistry(all)