Synthesis of Reagents for the Construction of Hypusine and Deoxyhypusine Peptides and Their Application as Peptidic Antigens
作者:Raymond J. Bergeron、William R. Weimar、Ralf Müller、Curt O. Zimmerman、Bruce H. McCosar、Hua Yao、Richard E. Smith
DOI:10.1021/jm980389p
日期:1998.9.1
Two new synthetic methods which allow access to (2S)-deoxyhypusine, natural (2S,9R)hypusine, (2S,SS)-hypusine, and deoxyhypusine- and hypusine-containing peptides are described. The methods involve both the construction of a deoxyhypusine reagent in which the alpha-nitrogen protecting group is orthogonal to the N-7 and N-12 protecting groups and an alternate synthesis of our previous hypusine reagent, a synthesis which provides for better stereochemical control at C-9. Synthetic hypusine and deoxyhypusine can be generated from these reagents. The hypusine-containing hexapeptide (Cys-Thr-Gly-Hpu-His-Gly) is conjugated to ovalbumin (OVA), keyhole limpet hemocyanin (KLH), and a bis-maleimide; KLH conjugates are also made with the deoxyhypusine- and lysine-containing hexapeptides. Monoclonal antibodies are generated to the hypusine-containing hexapeptide-OVA conjugate in mice. These are isolated and screened against the hypusine-containing hexapeptide-KLH and hypusine-containing hexapeptide-bis-maleimide conjugates, as well as against the deoxyhypusine-containing and lysine-containing hexapeptide-KLH conjugates. These antibodies may be useful in localizing intracellular hypusine-containing peptides as well as peptides containing hypusine analogues.