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Protein splicing in vitro with a semisynthetic two-component minimal intein
1Boston Biomedical Research Institute, Boston, Massachusetts 02114, USA.
The Journal of Biological Chemistry
|June 20, 1998
Summary
This study demonstrates protein splicing using a synthetic intein fragment. Researchers achieved protein splicing by reducing a disulfide-linked dimer, enabling new methods for studying intein function.
Area of Science:
- Biochemistry
- Molecular Biology
- Protein Engineering
Background:
- Inteins are protein splicing elements that catalyze their own excision.
- A trans-splicing system was previously developed using Mycobacterium tuberculosis RecA intein fragments.
Purpose of the Study:
- To investigate protein splicing using synthetic intein fragments.
- To explore the potential of synthetic peptides in intein-mediated protein ligation.
Main Methods:
- Reconstitution of N-terminal intein fragment and synthetic C-terminal peptides.
- Induction of splicing via reduction of a disulfide-linked dimer.
- Analysis of splicing products using PAGE, mass spectrometry, and Western blotting.
Main Results:
- A disulfide-linked dimer of the N-terminal fragment and synthetic peptide accumulated.
- Reduction of the disulfide bond induced protein splicing.
- Successful identification of intermediate and spliced products.
Conclusions:
- This is the first demonstration of protein splicing involving a synthetic intein fragment.
- This approach facilitates the study of intein active site structure and function.
- Opens possibilities for using non-natural amino acids in synthetic intein peptides.