Solid phase synthesis of a trypsin inhibitor isolated from the Cucurbitaceae Ecballium elaterium
- 1 December 1989
- journal article
- research article
- Published by Wiley in International Journal of Peptide and Protein Research
- Vol. 34 (6), 492-497
- https://doi.org/10.1111/j.1399-3011.1989.tb01399.x
Abstract
The synthesis of a 28-residue peptide isolated from Ecballium elaterium of the Cucurbitaceae family which strongly inhibits trypsin activities (Ka = 8.cntdot.10-11 M), using BOP as the coupling reagent in a solid phase procedure is presented. This micro protein contains three disulfide bridges in its sequence and was obtained after oxidation of the six half-cysteine residues either by air or with the use of carboethoxysulfenyl chloride. After purification by semi-preparative HPLC, the synthesis product was shown by trypsin inhibition tests to be identical with the trypsin inhibitor EETI II isolated from Ecballium elaterium.Keywords
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