Synthesis of Zwitterionic Polymers Containing a Tertiary Sulfonium Group for Protein Stabilization.

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ID: 3604
2019
The present study demonstrates the controlled synthesis and biological potential of poly( N-acryloyl-l-methionine methyl sulfonium salt)s (poly(A-Met(S)-OH)s), which mimic dimethylsulfoniopropionate (DMSP), a compound produced by marine algae to protect their proteins. The novel sulfonium-containing zwitterionic polymers were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization of the amino acid-based monomer N-acryloyl-l-methionine (A-Met-OH) followed by a postmodification process in which the sulfide groups were reacted with iodomethane. The DMSP-mimic zwitterionic macromolecules were shown for the first time to exhibit low cytotoxicity and the ability to stabilize proteins. By adding the resulting poly(A-Met(S)-OH)s to horse radish peroxidase (HRP) solution, the activity of HRP was maintained even after storage at 4 °C for several days. In addition, the protein activities were tested using peroxidase-labeled antibody to mouse immunoglobulin G (IgG-HRP) and alkaline phosphatase (ALP) after storage and for HRP after freeze-thaw cycles. Amphiphilic random copolymers, poly(A-Met(S)-OH- co-BA)s, also exhibited excellent properties for protein stabilization.
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Authors Imamura, Ryutaro;Mori, Hideharu;
Journal Biomacromolecules
Year 2019
DOI 10.1021/acs.biomac.8b01542
URL
Keywords Keywords not found

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