Engineering permissive insertion sites in the bacteriophage Phi29 DNA-linked terminal protein
Publicated to:Plos One. 11 (10): - 2016-01-01 11(10), DOI: 10.1371/journal.pone.0164901
Authors: Gella P; Salas M; Mencía M
Affiliations
Abstract
Many different DNA delivery vehicles have been developed and tested, all with their advantages and disadvantages. The bacteriophage phi29 terminal protein (TP) is covalently linked to the 5' ends of the phage genome during the DNA replication process. Our approach is to utilize this TP as a platform to incorporate different protein or peptide modules that can target the DNA to the interior of the cell, to the nucleus, or even to subcellular compartments. In order to be able to insert different peptide modules on the TP sequence to endow it with desired functions and/or eliminate unwanted regions of the protein, we have carried out a transposition screening to detect insertion-permissive points on the sequence of the TP. We report the functional characterization of 12 insertion mutants of the TP, and the identification of one site at position 38 that allows the insertion of peptides up to 17 amino acids in length while maintaining the ability of the TP to support DNA amplification in vitro. A protein with one insertion at that position containing a cysteine residue, a linker, and a thrombin recognition site was purified and its amplification activity was optimized. © 2016 Gella et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Bibliometric impact. Analysis of the contribution and dissemination channel
The work has been published in the journal Plos One due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2016, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category .
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Leadership analysis of institutional authors
There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (GELLA MONTERO, PABLO) .