Carboxamidomethyl esters (CAM esters) as carboxyl protecting groups.
作者:Jean Martinez、Jeanine Laur、Bertrand Castro
DOI:10.1016/s0040-4039(00)88401-4
日期:1983.1
The carboxamidomethyl esters (CAM esters) are proposed for carboxyl protection in peptide synthesis. Amino acid CAM ester derivatives were easily prepared and showed good stability in the deblocking conditions of other common protectinggroups used in peptide synthesis. The CAM esters were selectively and rapidly hydrolyzed in an alcaline medium.
Development of a Hypusine Reagent for Peptide Synthesis
作者:Raymond J. Bergeron、Christian Ludin、Ralf Müller、Richard E. Smith、Phanstiel
DOI:10.1021/jo970119z
日期:1997.5.1
The synthesis of a reagent that enables the incorporation of the unusual amino acid (2S,9R)hypusine (Hpu) into peptide sequences is described. The reagent, (2S,SR)-11-[(benzyloxycarbonyl)amino]-7-(carbobenzyloxy)-2- [(9-fluorenylmethoxycarbonyl)amino]-9-(tetrahydropyran-2-yloxy)- 7-azaundecanoic acid, is utilized in the synthesis of a hexapeptide containing the primary pentapeptide sequence of the eukaryotic initiation factor eIF-5A, L-Cys-L-Thr-Gly-Hpu-L-His-Gly. The reagent is shown to be effective for both solution phase and Merrifield resin synthesis.
Synthesis and biological activity of new peptide segments of gastrin exhibiting gastrin antagonist property
作者:Jean Martinez、Richard Magous、Marie Francoise Lignon、Jeanine Laur、Bertrand Castro、Jean Pierre Bali
DOI:10.1021/jm00378a012
日期:1984.12
A series of C-terminal peptide segments of gastrin, i.e., (tert-butyloxycarbonyl)-L-tryptophyl-L-methionyl-L-aspartic acid amide, (tert-butyloxycarbonyl)-glycyl-L-tryptophyl-L-methionyl-L-aspartic acid amide, (tert-butyloxy-carbonyl)-L-tyrosyl-glycyl-L-tryptophyl-L-methionyl-L-asp artic acid amide, and (benzyloxycarbonyl)-L-glutamyl-L-alanyl-L-tyrosyl-glycyl-L-tryptophyl-L -methionyl-L-aspartic acid amide were prepared and were shown to competitively inhibit the binding of labeled human gastrin to its receptors in an isolated gastric mucosal cell preparation and to antagonize the action of gastrin on gastric acid secretion (ED50 from 1.5 to 7 mg/kg) in vivo in the reperfused rat stomach, determined according to the method of Ghosh and Schild. From these studies, it could be concluded that the C-terminal phenylalanine residue, which is of primary importance for intrinsic biological gastrin-like activity, is not essential for binding to gastrin receptors.