Synthesis of Sulfotyrosine‐Containing Peptides by Incorporating Fluorosulfated Tyrosine Using an Fmoc‐Based Solid‐Phase Strategy |
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| Authors: | Wentao Chen Dr Jiajia Dong Dr Suhua Li Dr Yu Liu Dr Yujia Wang Leonard Yoon Dr Peng Wu Dr K Barry Sharpless Dr Jeffery W Kelly |
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| Affiliation: | 1. Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA;2. Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA;3. The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA, USA |
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| Abstract: | Tyrosine O‐sulfation is a common protein post‐translational modification that regulates many biological processes, including leukocyte adhesion and chemotaxis. Many peptides with therapeutic potential contain one or more sulfotyrosine residues. We report a one‐step synthesis for Fmoc‐fluorosulfated tyrosine. An efficient Fmoc‐based solid‐phase peptide synthetic strategy is then introduced for incorporating the fluorosulfated tyrosine residue into peptides of interest. Standard simultaneous peptide‐resin cleavage and removal of the acid‐labile side‐chain protecting groups affords the crude peptides containing fluorosulfated tyrosine. Basic ethylene glycol, serving both as solvent and reactant, transforms the fluorosulfated tyrosine peptides into sulfotyrosine peptides in high yield. |
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| Keywords: | click chemistry peptides solid-phase synthesis SuFEx sulfotyrosine |
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