Abstract
A simple procedure for conjugating synthetic fragments of the capsular polysaccharide of Haemophilus influenzae type b, poly-3-β-D-ribose-(1, 1)-D-ribitol-5-phosphate (sPRP) to linear peptides is described. The procedure consists of (i) reacting the amino group of amino-heptyl sPRP with m-maleimidobenzoyl-N-hydroxysuccinimide (MBS) in phosphate buffer, pH 7.5; (ii) selectively coupling the MBS-modified sPRP to the sulfhydryl group of the cysteine residue of peptides containing functional T-helper cell epitope(s). The glycopeptide conjugates were purified by gel filtration chromatography, biochemically characterized, and elicited protective level of anti-PRP antibody responses in rabbits. Abbreviations: PRP, poly-3-β-D-ribose-(1, 1)-D-ribitol-5-phosphate; sPRP, synthetic oligo-3-β-D-ribose-(1, 1)-D-ribitol-5-phosphate; Hib, Haemophilus influenzae type b; MBS, m-maleimidobenzoyl-N-hydroxysuccinimide; PEG, polyethylene glycol monomethyl ether; CRM 197, a non-toxic diphtheria toxin mutant; TT, tetanus toxoid; DT, diphtheria toxoid; OMP, outer membrane protein; RP-HPLC reverse phase high pressure liquid chromatograph
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Kandil, A.A., Chan, N., Klein, M. et al. Chemical synthesis of Haemophilus influenzae glycopeptide conjugates. Glycoconj J 14, 13–17 (1997). https://doi.org/10.1023/A:1018500712733
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DOI: https://doi.org/10.1023/A:1018500712733