Immunogenicity changes in melittin conjugates by structural modifications

V. Curcio-Vonlanthen, Zhenjun Zhao, H. P. Rolli, C. H. Schneider

Research output: Contribution to conferencePaperpeer-review


Peptides derived from the bee-venom melittin were fitted with the haptenic group dinitrocarboxyphenyl (Dncp) and tested in out-bred guinea pigs for immunogenicity by measuring the IgG anti-Dncp antibody response by ELISA. Dncp-conjugates comprising virtually the entire melittin proved to be strong immunogens producing antibody responses comparable to those of proteins. Weak responses were obtained with considerably shortened sequences. Conjugates with N-terminal Dncp gave markedly reduced antibody responses compared to peptides with C-terminal Dncp. An N-terminal biotinyl substituent abolished the immune response whereas N-terminal lauryl and caprylyl had little effect. Insertion of L-proline into a hexadecapeptide conjugate abolishing the possibility of helix formation gave an immunogen to which individual animals clearly responded on a low level. Oligomerisation, but not the cytolytic activity of melittin peptides, may contribute to the immunogenicities observed.
Original languageEnglish
Number of pages2
Publication statusPublished - 1994
Externally publishedYes
Event23rd European peptide symposium - Braga, Portugal
Duration: 4 Sept 199410 Sept 1994


Conference23rd European peptide symposium


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