Chemical Synthesis of Phosphorylated Insulin-like Growth Factor Binding Protein 2
Bhavesh Premdjee, Asser S. Andersen, Mark Larance, Kilian W. Conde‐Frieboes, Richard J. Payne
Abstract
Chemical protein synthesis is a powerful avenue for accessing homogeneously modified proteins. While a significant number of small modified proteins bearing native post-translational modifications and non-natural modifications have been generated to date, access to larger targets has proved challenging. Herein, we describe the use of two ligation manifolds, namely, diselenide-selenoester ligation and native chemical ligation, to assemble a 31.5 kDa phosphorylated insulin-like growth factor binding protein (IGFBP-2) that comprises 290 amino acid residues, a phosphoserine post-translational modification, and nine disulfide bonds.
Topics & Concepts
ChemistryPhosphorylationGrowth factorInsulinInsulin-like growth factor-binding proteinInsulin-like growth factorBiochemistryInternal medicineReceptorMedicinePancreatic function and diabetesChemical Synthesis and AnalysisUbiquitin and proteasome pathways