Eliminating helper phage from phage display.

Abstract:

:Phage display technology involves the display of proteins or peptides, as coat protein fusions, on the surface of a phage or phagemid particles. Using standard technology, helper phage are essential for the replication and assembly of phagemid particles, during library production and biopanning. We have eliminated the need to add helper phage by using 'bacterial packaging cell lines' that provide the same functions. These cell lines contain M13-based helper plasmids that express phage packaging proteins which assemble phagemid particles as efficiently as helper phage, but without helper phage contamination. This results in genetically pure phagemid particle preparations. Furthermore, by using constructs differing in the form of gene 3 that they contain, we have shown that the display, from a single library, can be modulated between monovalent (phagemid-like) and multivalent display (phage-like) without any further engineering. These packaging cells eliminate the use of helper phage from phagemid-based selection protocols; reducing the amount of technical preparation, facilitating automation, optimizing selections by matching display levels to diversity, and effectively using the packaged phagemid particles as means to transfer genetic information at an efficiency approaching 100%.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Chasteen L,Ayriss J,Pavlik P,Bradbury AR

doi

10.1093/nar/gkl772

subject

Has Abstract

pub_date

2006-01-01 00:00:00

pages

e145

issue

21

eissn

0305-1048

issn

1362-4962

pii

gkl772

journal_volume

34

pub_type

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