Disclosed herein, are Zwitterion polymer conjugates. The conjugate comprises a Zwitterion polymer, a linker, and a therapeutic polypeptide. Also described herein, are compositions comprising the conjugates, methods of their preparation, methods of treating diseases with the conjugates or their compositions, and method of preventing aggregation of therapeutic proteins.
Influence of Sulfoxide Group Placement on Polypeptide Conformational Stability
作者:Eric G. Gharakhanian、Ehab Bahrun、Timothy J. Deming
DOI:10.1021/jacs.9b07223
日期:2019.9.18
The synthesis of a homologous series containing five new non-ionic sulfoxide containing polypeptides was described. Sulfoxide groups bestowed water solubility for all homologs, which allowed their use as a model for study of helix-coil transitions in water while avoiding contributions from charged groups or phase separation. Polypeptides were found to adopt chain conformations in water that were dependent
Friedel-Crafts α-Aminoacylation of Aromatic Compounds with a Chiral N-Carboxy-α-amino Acid Anhydride (NCA); Part 2
作者:Osamu Itoh、Akira Amano
DOI:10.1055/s-1999-3405
日期:1999.3
The N-carboxy-α-amino acid anhydrides (NCA) derived from L-Asp(OEt), L-Glu(OMe), L-Met, and L-Pro reacted with aromatic compounds (toluene or benzene) in the presence of AlCl3, to afford the corresponding α-aminoalkyl aryl ketones as hydrochloride salts in moderate yields. The β- and γ-amino acid esters, which were obtained from the reaction of the aromatic compounds with L-Asp(OEt)- and L-Glu(OMe)-NCA, were hydrolyzed by hydrochloric acid to the corresponding β- and γ-amino acids as hydrochloride salts. L-Phe-NCA did not react with benzene in the presence of AlCl3, instead an intramolecular acylation occurred to afford (S)-2-aminoindanone hydrochloride. The chiralities of the original L-α-amino acids were most retained during these α-aminoacylation.
Rapid and Mild Synthesis of Amino Acid <i>N</i>
-Carboxy Anhydrides: Basic-to-Acidic Flash Switching in a Microflow Reactor
作者:Yuma Otake、Hiroyuki Nakamura、Shinichiro Fuse
DOI:10.1002/anie.201803549
日期:2018.8.27
Polymerization of N‐carboxyanhydrides (NCAs) is the primary process used to prepare polypeptides. The synthesis of various pure NCAs is key to the efficient synthesis of polypeptides. The only practical method that can be used to synthesize NCAs requires harsh acidic conditions that make acid‐labile substrates unusable and results in an undesired ring opening of NCAs. Basic‐to‐acidic flash switching
Preparation of Multifunctional and Multireactive Polypeptides via Methionine Alkylation
作者:Jessica R. Kramer、Timothy J. Deming
DOI:10.1021/bm300807b
日期:2012.6.11
We report the development of a new “click”-type reaction for polypeptide modification based on the chemoselective alkylation of thioether groups in methionine residues. The controlled synthesis of methionine polymers and their alkylation by a broad range of functional reagents to yield stable sulfonium derivatives are described. These “methionine click” functionalizations are compatible with deprotection