alexa In vitro protein splicing of purified precursor and the identification of a branched intermediate.
Biochemistry

Biochemistry

Biochemistry & Physiology: Open Access

Author(s): Xu MQ, Southworth MW, Mersha FB, Hornstra LJ, Perler FB

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Abstract Protein splicing is a posttranslational processing event in which an internal polypeptide is excised from a protein precursor and the terminal polypeptides are then ligated together, resulting in the production of two proteins. This report presents direct evidence for protein splicing by demonstrating in vitro splicing of purified precursor that accumulated when the protein splicing element from Pyrococcus DNA polymerase was cloned into a foreign gene. In vitro splicing was temperature and pH dependent. A slowly migrating species exhibited kinetic properties of a splicing intermediate and was shown to be a branched molecule by N-terminal sequencing. The precursor and slowly migrating species were interconvertible in response to pH shifts.
This article was published in Cell and referenced in Biochemistry & Physiology: Open Access

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