Premium
Post‐Translational Backbone Engineering through Selenomethionine‐Mediated Incorporation of Freidinger Lactams
Author(s) -
Flood Dillon T.,
Yan Nicholas L.,
Dawson Philip E.
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201804885
Subject(s) - peptide , alkylation , chemistry , combinatorial chemistry , amino acid , peptide synthesis , aqueous solution , lactam , stereochemistry , selenium , topology (electrical circuits) , biochemistry , organic chemistry , catalysis , mathematics , combinatorics
Amino‐γ‐lactam (Agl) bridged dipeptides, commonly known as Freidinger lactams, have been shown to constrain peptide backbone topology and stabilize type II′ β‐turns. The utility of these links as peptide constraints has inspired new approaches to their incorporation into complex peptides and peptoids, all of which require harsh reaction conditions or protecting groups that limit their use on unprotected peptides and proteins. Herein, we employ a mild and selective alkylation of selenomethionine in acidic aqueous solution, followed by immobilization of the alkylated peptide on to bulk reverse‐phase C 18 silica and base‐induced lactamization in DMSO. The utilization of selenomethionine, which is readily introduced by synthesis or expression, and the mild conditions enable selective backbone engineering in complex peptide and protein systems.