Cargando…
Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA
BACKGROUND: Many cellular multi-protein complexes are naturally present in cells at low abundance. Baculovirus expression offers one approach to produce milligram quantities of correctly folded and processed eukaryotic protein complexes. However, current strategies suffer from the need to produce la...
Autores principales: | , , , , , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2009
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2749033/ https://www.ncbi.nlm.nih.gov/pubmed/19725957 http://dx.doi.org/10.1186/1471-2199-10-87 |
_version_ | 1782172157450649600 |
---|---|
author | Noad, Rob J Stewart, Meredith Boyce, Mark Celma, Cristina C Willison, Keith R Roy, Polly |
author_facet | Noad, Rob J Stewart, Meredith Boyce, Mark Celma, Cristina C Willison, Keith R Roy, Polly |
author_sort | Noad, Rob J |
collection | PubMed |
description | BACKGROUND: Many cellular multi-protein complexes are naturally present in cells at low abundance. Baculovirus expression offers one approach to produce milligram quantities of correctly folded and processed eukaryotic protein complexes. However, current strategies suffer from the need to produce large transfer vectors, and the use of repeated promoter sequences in baculovirus, which itself produces proteins that promote homologous recombination. One possible solution to these problems is to construct baculovirus genomes that express each protein in a complex from a separate locus within the viral DNA. However current methods for selecting such recombinant genomes are too inefficient to routinely modify the virus in this way. RESULTS: This paper reports a method which combines the lambda red and bacteriophage P1 Cre-recombinase systems to efficiently generate baculoviruses in which protein complexes are expressed from multiple, single-locus insertions of foreign genes. This method is based on an 88 fold improvement in the selection of recombinant viruses generated by red recombination techniques through use of a bipartite selection cassette. Using this system, seven new genetic loci were identified in the AcMNPV genome suitable for the high level expression of recombinant proteins. These loci were used to allow the recovery two recombinant virus-like particles with potential biotechnological applications (influenza A virus HA/M1 particles and bluetongue virus VP2/VP3/VP5/VP7 particles) and the mammalian chaperone and cancer drug target CCT (16 subunits formed from 8 proteins). CONCLUSION: 1. Use of bipartite selections can significantly improve selection of modified bacterial artificial chromosomes carrying baculovirus DNA. Furthermore this approach is sufficiently robust to allow routine modification of the virus genome. 2. In addition to the commonly used p10 and polyhedrin loci, the ctx, egt, 39k, orf51, gp37, iap2 and odv-e56 loci in AcMNPV are all suitable for the high level expression of heterologous genes. 3. Two protein, four protein and eight protein complexes including virus-like particles and cellular chaperone complexes can be produced using the new approach. |
format | Text |
id | pubmed-2749033 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-27490332009-09-23 Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA Noad, Rob J Stewart, Meredith Boyce, Mark Celma, Cristina C Willison, Keith R Roy, Polly BMC Mol Biol Methodology Article BACKGROUND: Many cellular multi-protein complexes are naturally present in cells at low abundance. Baculovirus expression offers one approach to produce milligram quantities of correctly folded and processed eukaryotic protein complexes. However, current strategies suffer from the need to produce large transfer vectors, and the use of repeated promoter sequences in baculovirus, which itself produces proteins that promote homologous recombination. One possible solution to these problems is to construct baculovirus genomes that express each protein in a complex from a separate locus within the viral DNA. However current methods for selecting such recombinant genomes are too inefficient to routinely modify the virus in this way. RESULTS: This paper reports a method which combines the lambda red and bacteriophage P1 Cre-recombinase systems to efficiently generate baculoviruses in which protein complexes are expressed from multiple, single-locus insertions of foreign genes. This method is based on an 88 fold improvement in the selection of recombinant viruses generated by red recombination techniques through use of a bipartite selection cassette. Using this system, seven new genetic loci were identified in the AcMNPV genome suitable for the high level expression of recombinant proteins. These loci were used to allow the recovery two recombinant virus-like particles with potential biotechnological applications (influenza A virus HA/M1 particles and bluetongue virus VP2/VP3/VP5/VP7 particles) and the mammalian chaperone and cancer drug target CCT (16 subunits formed from 8 proteins). CONCLUSION: 1. Use of bipartite selections can significantly improve selection of modified bacterial artificial chromosomes carrying baculovirus DNA. Furthermore this approach is sufficiently robust to allow routine modification of the virus genome. 2. In addition to the commonly used p10 and polyhedrin loci, the ctx, egt, 39k, orf51, gp37, iap2 and odv-e56 loci in AcMNPV are all suitable for the high level expression of heterologous genes. 3. Two protein, four protein and eight protein complexes including virus-like particles and cellular chaperone complexes can be produced using the new approach. BioMed Central 2009-09-02 /pmc/articles/PMC2749033/ /pubmed/19725957 http://dx.doi.org/10.1186/1471-2199-10-87 Text en Copyright © 2009 Noad et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Methodology Article Noad, Rob J Stewart, Meredith Boyce, Mark Celma, Cristina C Willison, Keith R Roy, Polly Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title | Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title_full | Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title_fullStr | Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title_full_unstemmed | Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title_short | Multigene expression of protein complexes by iterative modification of genomic Bacmid DNA |
title_sort | multigene expression of protein complexes by iterative modification of genomic bacmid dna |
topic | Methodology Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2749033/ https://www.ncbi.nlm.nih.gov/pubmed/19725957 http://dx.doi.org/10.1186/1471-2199-10-87 |
work_keys_str_mv | AT noadrobj multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna AT stewartmeredith multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna AT boycemark multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna AT celmacristinac multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna AT willisonkeithr multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna AT roypolly multigeneexpressionofproteincomplexesbyiterativemodificationofgenomicbacmiddna |