<i>In Vivo</i>Biotinylation of Fusion Proteins Expressed in<i>Escherichia coli</i>with a Sequence of<i>Propionibacterium freudenreichii</i>Transcarboxylase 1.3S Biotin Subunit

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  • In Vivo Biothinylation of Fusion Proteins Expressed in Escherichia coli with a Sequence of Propionibacterium freudenreichii Transcarboxylase 1.3S Biotin Subunit.

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Biotinylation of fusion proteins in E.coli was studied using a sequence of Propionibacterium freudenreichii transcarboxylase 1.3S biotin subunit. As the biotinylation sequence, we examined two sequences : one was of amino acid residues [84-123] of 1.3S, a partial sequence containing a region from a conserved tetrapeptide (Ala-Met-Bct-Met) around the biotinyl lysine(Bct) to the carboxyl terminal ; the other was of an almost entire sequence [18-123]. We constructed recombinant plasmids for fusion proteins of β-galactosidase, of chloramphenicol acetyltransferase, and of alkaline phosphatase. We found the biotinylation in the [18-123] sequence fused to alkaline phosphatase.

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