title: [Solid-phase synthesis of peptides containing arginine with an unprotected guanidine group].
abstract: A new variant of the solid phase synthesis of arginine-containing peptides was proposed. The conditions for the attachment to the Wang polymer of N alpha-Fmoc-arginine containing a protonated guanidine group were found. We demonstrated that this attachment is accompanied by neither racemization nor the attachment of the second Arg residue. Side reactions involving the guanidine group of arginine were studied, and methods for their prevention were proposed. The comparison of the carbodiimide method with a 1-hydroxybenzotriazole additive and a modified method with the use of Kastro's reagent for the introduction of N alpha-Fmoc-Arg residue with the unprotected guanidine group into the growing peptide chain demonstrated the advantages of the second method. Bradykinin and a peptide corresponding to the 584-591 sequence of the transmembrane gp41 from HIV-1 were synthesized by the method proposed here.
authors.affiliation: Russian Cardiological Research and Production Association, Ministry of Public Health of the Russian Federation, Moscow, Russia. peptide@cardio.ru
authors.forename: A Iu
authors.initials: AIu
authors.lastname: Rubina
authors.forename: Zh D
authors.initials: ZhD
authors.lastname: Bespalova
authors.forename: V N
authors.initials: VN
authors.lastname: Bushuev
mesh_terms: D001120:Arginine / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D019791:Guanidine / Q000032:analysis*; D015700:HIV Envelope Protein gp41 / Q000737:chemistry; D015497:HIV-1 / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010452:Peptide Biosynthesis; D010455:Peptides / Q000737:chemistry*
chemical_list: D015700:HIV Envelope Protein gp41; D010455:Peptides; D001120:Arginine; D019791:Guanidine
vernacular_title: Tverdofaznyĭ sintez peptidov, soderzhashchikh arginin s nezashchishchennoĭ guanidinovoĭ gruppoĭ.