title: Total chemical synthesis of bovine pancreatic trypsin inhibitor by native chemical ligation.
abstract: Bovine pancreatic trypsin inhibitor (BPTI) is an important model for the study of protein folding. Herein we describe a robust approach to the total chemical synthesis of BPTI using native chemical ligation of unprotected peptide segments in aqueous solution. After refolding and oxidative formation of disulfides, the target protein was purified by affinity chromatography. The synthetic BPTI was characterized by mass spectrometry, inhibition assay, thermal denaturation and 2D NMR spectroscopy, and was shown to be structurally and functionally identical to natural BPTI. The synthetic strategy presented in this paper has enabled us to establish rapid access to novel analogues of BPTI.
authors.affiliation: Gryphon Sciences, South San Francisco, CA 94080, USA. wuyuan_lu@gryphonsci.com
authors.forename: W
authors.initials: W
authors.lastname: Lu
authors.forename: M A
authors.initials: MA
authors.lastname: Starovasnik
authors.forename: S B
authors.initials: SB
authors.lastname: Kent
mesh_terms: D000818:Animals; D002417:Cattle; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010179:Pancreas / Q000737:chemistry*; D010940:Plant Proteins / Q000138:chemical synthesis* / Q000737:chemistry; D011489:Protein Denaturation; D017510:Protein Folding; D014361:Trypsin Inhibitors; D000516:alpha-Amylases / Q000037:antagonists & inhibitors
chemical_list: D010940:Plant Proteins; D014361:Trypsin Inhibitors; D000516:alpha-Amylases