1
|
Mejias-Gomez O, Madsen AV, Pedersen LE, Kristensen P, Goletz S. Eliminating OFF-frame clones in randomized gene libraries: An improved split β-lactamase enrichment system. N Biotechnol 2023; 75:13-20. [PMID: 36889578 DOI: 10.1016/j.nbt.2023.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/20/2023] [Accepted: 03/04/2023] [Indexed: 03/08/2023]
Abstract
Large, randomized libraries are a key technology for many biotechnological applications. While genetic diversity is the main parameter most libraries direct their resources on, less focus is devoted to ensuring functional IN-frame expression. This study describes a faster and more efficient system based on a split β-lactamase complementation for removal of OFF-frame clones and increase of functional diversity, suitable for construction of randomized libraries. The gene of interest is inserted between two fragments of the β-lactamase gene, conferring resistance to β-lactam drugs only upon expression of an inserted IN-frame gene without stop codons or frameshifts. The preinduction-free system was capable of eliminating OFF-frame clones in starting mixtures of as little as 1% IN-frame clones and enriching to about 70% IN-frame clones, even when their starting rate was as low as 0.001%. The curation system was verified by constructing a single-domain antibody phage display library using trinucleotide phosphoramidites for randomizing a complementary determining region, while eliminating OFF-frame clones and maximizing functional diversity.
Collapse
Affiliation(s)
- Oscar Mejias-Gomez
- Department of Biotechnology and Biomedicine, Section for Protein Science and Biotherapeutics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Andreas V Madsen
- Department of Biotechnology and Biomedicine, Section for Protein Science and Biotherapeutics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lasse E Pedersen
- Department of Biotechnology and Biomedicine, Section for Protein Science and Biotherapeutics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Peter Kristensen
- Department of Chemistry and Bioscience, Section for Bioscience and Engineering, Aalborg University, Aalborg, Denmark
| | - Steffen Goletz
- Department of Biotechnology and Biomedicine, Section for Protein Science and Biotherapeutics, Technical University of Denmark, Kongens Lyngby, Denmark.
| |
Collapse
|
2
|
Boone M, Ramasamy P, Zuallaert J, Bouwmeester R, Van Moer B, Maddelein D, Turan D, Hulstaert N, Eeckhaut H, Vandermarliere E, Martens L, Degroeve S, De Neve W, Vranken W, Callewaert N. Massively parallel interrogation of protein fragment secretability using SECRiFY reveals features influencing secretory system transit. Nat Commun 2021; 12:6414. [PMID: 34741024 PMCID: PMC8571348 DOI: 10.1038/s41467-021-26720-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 10/15/2021] [Indexed: 11/09/2022] Open
Abstract
While transcriptome- and proteome-wide technologies to assess processes in protein biogenesis are now widely available, we still lack global approaches to assay post-ribosomal biogenesis events, in particular those occurring in the eukaryotic secretory system. We here develop a method, SECRiFY, to simultaneously assess the secretability of >105 protein fragments by two yeast species, S. cerevisiae and P. pastoris, using custom fragment libraries, surface display and a sequencing-based readout. Screening human proteome fragments with a median size of 50-100 amino acids, we generate datasets that enable datamining into protein features underlying secretability, revealing a striking role for intrinsic disorder and chain flexibility. The SECRiFY methodology generates sufficient amounts of annotated data for advanced machine learning methods to deduce secretability patterns. The finding that secretability is indeed a learnable feature of protein sequences provides a solid base for application-focused studies.
Collapse
Affiliation(s)
- Morgane Boone
- Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium. .,Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium. .,Department of Biochemistry and Biophysics, UCSF, San Francisco, CA, USA.
| | - Pathmanaban Ramasamy
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium ,grid.8767.e0000 0001 2290 8069Structural Biology Brussels, VUB, Brussels, Belgium ,grid.11486.3a0000000104788040Structural Biology Research Center, VIB, Brussels, Belgium ,Interuniversity Institute of Bioinformatics in Brussels (IB)2, ULB-VUB, Brussels, Belgium
| | - Jasper Zuallaert
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium ,grid.510328.dCenter for Biotech Data Science, Ghent University Global Campus, Songdo, Incheon, South Korea ,grid.5342.00000 0001 2069 7798IDLab, ELIS, UGent, Ghent, Belgium
| | - Robbin Bouwmeester
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Berre Van Moer
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Davy Maddelein
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Demet Turan
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Niels Hulstaert
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Hannah Eeckhaut
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Elien Vandermarliere
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Lennart Martens
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Sven Degroeve
- grid.11486.3a0000000104788040Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium ,grid.5342.00000 0001 2069 7798Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Wesley De Neve
- grid.510328.dCenter for Biotech Data Science, Ghent University Global Campus, Songdo, Incheon, South Korea ,grid.5342.00000 0001 2069 7798IDLab, ELIS, UGent, Ghent, Belgium
| | - Wim Vranken
- grid.8767.e0000 0001 2290 8069Structural Biology Brussels, VUB, Brussels, Belgium ,grid.11486.3a0000000104788040Structural Biology Research Center, VIB, Brussels, Belgium ,Interuniversity Institute of Bioinformatics in Brussels (IB)2, ULB-VUB, Brussels, Belgium
| | - Nico Callewaert
- Center for Medical Biotechnology, VIB, Zwijnaarde, Belgium. .,Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium.
| |
Collapse
|
3
|
Puccio S, Grillo G, Consiglio A, Soluri MF, Sblattero D, Cotella D, Santoro C, Liuni S, Bellis GD, Lugli E, Peano C, Licciulli F. InteractomeSeq: a web server for the identification and profiling of domains and epitopes from phage display and next generation sequencing data. Nucleic Acids Res 2020; 48:W200-W207. [PMID: 32402076 PMCID: PMC7319578 DOI: 10.1093/nar/gkaa363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/16/2020] [Accepted: 05/05/2020] [Indexed: 01/03/2023] Open
Abstract
High-Throughput Sequencing technologies are transforming many research fields, including the analysis of phage display libraries. The phage display technology coupled with deep sequencing was introduced more than a decade ago and holds the potential to circumvent the traditional laborious picking and testing of individual phage rescued clones. However, from a bioinformatics point of view, the analysis of this kind of data was always performed by adapting tools designed for other purposes, thus not considering the noise background typical of the 'interactome sequencing' approach and the heterogeneity of the data. InteractomeSeq is a web server allowing data analysis of protein domains ('domainome') or epitopes ('epitome') from either Eukaryotic or Prokaryotic genomic phage libraries generated and selected by following an Interactome sequencing approach. InteractomeSeq allows users to upload raw sequencing data and to obtain an accurate characterization of domainome/epitome profiles after setting the parameters required to tune the analysis. The release of this tool is relevant for the scientific and clinical community, because InteractomeSeq will fill an existing gap in the field of large-scale biomarkers profiling, reverse vaccinology, and structural/functional studies, thus contributing essential information for gene annotation or antigen identification. InteractomeSeq is freely available at https://InteractomeSeq.ba.itb.cnr.it/.
Collapse
Affiliation(s)
- Simone Puccio
- Laboratory of Translational Immunology, Humanitas Clinical and Research Center, IRCCS, Rozzano (Milan), 20089, Italy
| | - Giorgio Grillo
- Institute for Biomedical Technologies, National Research Council, Bari 70100, Italy
| | - Arianna Consiglio
- Institute for Biomedical Technologies, National Research Council, Bari 70100, Italy
| | - Maria Felicia Soluri
- Department of Health Sciences & Center for TranslationalResearch on Autoimmune and Allergic Disease (CAAD), Università del Piemonte Orientale, Novara 28100, Italy
| | - Daniele Sblattero
- Department of Life Sciences, University of Trieste, Trieste 34100, Italy
| | - Diego Cotella
- Department of Health Sciences & Center for TranslationalResearch on Autoimmune and Allergic Disease (CAAD), Università del Piemonte Orientale, Novara 28100, Italy
| | - Claudio Santoro
- Department of Health Sciences & Center for TranslationalResearch on Autoimmune and Allergic Disease (CAAD), Università del Piemonte Orientale, Novara 28100, Italy
| | - Sabino Liuni
- Institute for Biomedical Technologies, National Research Council, Bari 70100, Italy
| | - Gianluca De Bellis
- Institute for Biomedical Technologies, National Research Council, Segrate (Milan) 20090, Italy
| | - Enrico Lugli
- Laboratory of Translational Immunology, Humanitas Clinical and Research Center, IRCCS, Rozzano (Milan), 20089, Italy.,Humanitas Flow Cytometry Core, Humanitas Clinical and Research Center, IRCCS, Rozzano (Milan) 20089, Italy
| | - Clelia Peano
- Institute of Genetic and Biomedical Research, UoS Milan, National Research Council, Rozzano (Milan) 20089, Italy.,Genomic Unit, Humanitas Clinical and Research Center, IRCCS,Rozzano (Milan) 20089, Italy
| | - Flavio Licciulli
- Institute for Biomedical Technologies, National Research Council, Bari 70100, Italy
| |
Collapse
|
4
|
Verma V, Joshi G, Gupta A, Chaudhary VK. An efficient ORF selection system for DNA fragment libraries based on split beta-lactamase complementation. PLoS One 2020; 15:e0235853. [PMID: 32701967 PMCID: PMC7377443 DOI: 10.1371/journal.pone.0235853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/23/2020] [Indexed: 11/29/2022] Open
Abstract
PCR-based amplification of annotated genes has allowed construction of expression clones at genome-scale using classical and recombination-based cloning technologies. However, genome-scale expression and purification of proteins for down-stream applications is often limited by challenges such as poor expression, low solubility, large size of multi-domain proteins, etc. Alternatively, DNA fragment libraries in expression vectors can serve as the source of protein fragments with each fragment encompassing a function of its whole protein counterpart. However, the random DNA fragmentation and cloning result in only 1 out of 18 clones being in the correct open-reading frame (ORF), thus, reducing the overall efficiency of the system. This necessitates the selection of correct ORF before expressing the protein fragments. This paper describes a highly efficient ORF selection system for DNA fragment libraries, which is based on split beta-lactamase protein fragment complementation. The system has been designed to allow seamless transfer of selected DNA fragment libraries into any downstream vector systems using a restriction enzyme-free cloning strategy. The strategy has been applied for the selection of ORF using model constructs to show near 100% selection of the clone encoding correct ORF. The system has been further validated by construction of an ORF-selected DNA fragment library of 30 genes of M. tuberculosis. Further, we have successfully demonstrated the cytosolic expression of ORF-selected protein fragments in E. coli.
Collapse
Affiliation(s)
- Vaishali Verma
- Centre for Innovation in Infectious Disease Research, Education and Training (CIIDRET), University of Delhi South Campus, New Delhi, India
| | - Gopal Joshi
- Centre for Innovation in Infectious Disease Research, Education and Training (CIIDRET), University of Delhi South Campus, New Delhi, India
| | - Amita Gupta
- Centre for Innovation in Infectious Disease Research, Education and Training (CIIDRET), University of Delhi South Campus, New Delhi, India
- Department of Biochemistry, University of Delhi South Campus, New Delhi, India
| | - Vijay K. Chaudhary
- Centre for Innovation in Infectious Disease Research, Education and Training (CIIDRET), University of Delhi South Campus, New Delhi, India
- Department of Biochemistry, University of Delhi South Campus, New Delhi, India
- * E-mail:
| |
Collapse
|
5
|
Soluri MF, Puccio S, Caredda G, Edomi P, D’Elios MM, Cianchi F, Troilo A, Santoro C, Sblattero D, Peano C. Defining the Helicobacter pylori Disease-Specific Antigenic Repertoire. Front Microbiol 2020; 11:1551. [PMID: 32849324 PMCID: PMC7396715 DOI: 10.3389/fmicb.2020.01551] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/16/2020] [Indexed: 12/19/2022] Open
Abstract
The analysis of the interaction between Helicobacter pylori (HP) and the host in vivo is an extremely informative way to enlighten the molecular mechanisms behind the persistency/latency of the bacterium as well as in the progression of the infection. An important source of information is represented by circulating antibodies targeting the bacteria that define a specific "disease signature" with prospective diagnostic implications. The diagnosis of some of the HP induced diseases such as gastric cancer (GC), MALT lymphoma (MALT), and autoimmune gastritis (AIG) is not easy because patients do not show symptoms of illness in early-onset stages, at the same time they progress rapidly. The possibility of identifying markers able to provide an early diagnosis would be extremely beneficial since a late diagnosis results in a delay in undergoing active therapy and reduces the survival rate of patients. With the aim to identify the HP antigens recognized during the host immune-response to the infection and possibly disease progression, we applied a discovery-driven approach, that combines "phage display" and deep sequencing. The procedure is based on the selection of ORF phage libraries, specifically generated from the pathogen's genome, with sera antibodies from patients with different HP-related diseases. To this end two phage display libraries have been constructed starting from genomic DNA from the reference HP 26695 and the pathogenic HP B128 strains; libraries were filtered for ORFs by using an ORF selection vector developed by our group (Di Niro et al., 2005; Soluri et al., 2018), selected with antibodies from patients affected by GC, MALT, and AIG and putative HP antigens/epitopes were identified after Sequencing and ranking. The results show that individual selection significantly reduced the library diversity and comparison of individual ranks for each condition allowed us to highlight a pattern of putative antigens specific for the different pathological outcomes or common for all of them. Within the putative antigens enriched after selection, we have validated protein CagY/Cag7 by ELISA assay as a marker of HP infection and progression. Overall, we have defined HP antigenic repertoire and identified a panel of putative specific antigens/epitopes for three different HP infection pathological outcomes that could be validated in the next future.
Collapse
Affiliation(s)
- Maria Felicia Soluri
- Department of Health Sciences & IRCAD, Università del Piemonte Orientale, Novara, Italy
- Center for Translational Research on Autoimmune and Allergic Disease, Università del Piemonte Orientale, Novara, Italy
| | - Simone Puccio
- Laboratory of Translational Immunology, IRCCS, Humanitas Clinical and Research Center, Rozzano, Italy
| | - Giada Caredda
- Department of Excellence in Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Paolo Edomi
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Mario Milco D’Elios
- Department of Experimental and Clinical Medicine, School of Human Health Sciences, University of Florence, Florence, Italy
| | - Fabio Cianchi
- Department of Experimental and Clinical Medicine, School of Human Health Sciences, University of Florence, Florence, Italy
| | - Arianna Troilo
- Department of Experimental and Clinical Medicine, School of Human Health Sciences, University of Florence, Florence, Italy
| | - Claudio Santoro
- Department of Health Sciences & IRCAD, Università del Piemonte Orientale, Novara, Italy
- Center for Translational Research on Autoimmune and Allergic Disease, Università del Piemonte Orientale, Novara, Italy
| | | | - Clelia Peano
- Institute of Genetic and Biomedical Research, UoS Milan, National Research Council, Milan, Italy
- Genomic Unit, IRCCS, Humanitas Clinical and Research Center, Milan, Italy
| |
Collapse
|
6
|
Ebo JS, Saunders JC, Devine PWA, Gordon AM, Warwick AS, Schiffrin B, Chin SE, England E, Button JD, Lloyd C, Bond NJ, Ashcroft AE, Radford SE, Lowe DC, Brockwell DJ. An in vivo platform to select and evolve aggregation-resistant proteins. Nat Commun 2020; 11:1816. [PMID: 32286330 PMCID: PMC7156504 DOI: 10.1038/s41467-020-15667-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/19/2020] [Indexed: 02/06/2023] Open
Abstract
Protein biopharmaceuticals are highly successful, but their utility is compromised by their propensity to aggregate during manufacture and storage. As aggregation can be triggered by non-native states, whose population is not necessarily related to thermodynamic stability, prediction of poorly-behaving biologics is difficult, and searching for sequences with desired properties is labour-intensive and time-consuming. Here we show that an assay in the periplasm of E. coli linking aggregation directly to antibiotic resistance acts as a sensor for the innate (un-accelerated) aggregation of antibody fragments. Using this assay as a directed evolution screen, we demonstrate the generation of aggregation resistant scFv sequences when reformatted as IgGs. This powerful tool can thus screen and evolve ‘manufacturable’ biopharmaceuticals early in industrial development. By comparing the mutational profiles of three different immunoglobulin scaffolds, we show the applicability of this method to investigate protein aggregation mechanisms important to both industrial manufacture and amyloid disease. Protein aggregation remains a significant challenge for manufacturing of protein biopharmaceuticals. Here, the authors demonstrate the use of directed evolution and an assay for in vivo innate protein aggregation-propensity to generate aggregation-resistant scFv fragments.
Collapse
Affiliation(s)
- Jessica S Ebo
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Janet C Saunders
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.,AstraZeneca, Granta Park, Cambridge, CB21 6GH, UK.,AstraZeneca, Granta Park, Cambridge, CB21 6GH, UK
| | - Paul W A Devine
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.,AstraZeneca, Granta Park, Cambridge, CB21 6GH, UK
| | - Alice M Gordon
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Amy S Warwick
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Bob Schiffrin
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | | | | | | | | | | | - Alison E Ashcroft
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - David C Lowe
- AstraZeneca, Granta Park, Cambridge, CB21 6GH, UK.
| | - David J Brockwell
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK. .,School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
| |
Collapse
|
7
|
Soluri MF, Puccio S, Caredda G, Grillo G, Licciulli VF, Consiglio A, Edomi P, Santoro C, Sblattero D, Peano C. Interactome-Seq: A Protocol for Domainome Library Construction, Validation and Selection by Phage Display and Next Generation Sequencing. J Vis Exp 2018. [PMID: 30346377 DOI: 10.3791/56981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Folding reporters are proteins with easily identifiable phenotypes, such as antibiotic resistance, whose folding and function is compromised when fused to poorly folding proteins or random open reading frames. We have developed a strategy where, by using TEM-1 β-lactamase (the enzyme conferring ampicillin resistance) on a genomic scale, we can select collections of correctly folded protein domains from the coding portion of the DNA of any intronless genome. The protein fragments obtained by this approach, the so called "domainome", will be well expressed and soluble, making them suitable for structural/functional studies. By cloning and displaying the "domainome" directly in a phage display system, we have showed that it is possible to select specific protein domains with the desired binding properties (e.g., to other proteins or to antibodies), thus providing essential experimental information for gene annotation or antigen identification. The identification of the most enriched clones in a selected polyclonal population can be achieved by using novel next-generation sequencing technologies (NGS). For these reasons, we introduce deep sequencing analysis of the library itself and the selection outputs to provide complete information on diversity, abundance and precise mapping of each of the selected fragment. The protocols presented here show the key steps for library construction, characterization, and validation.
Collapse
Affiliation(s)
- Maria Felicia Soluri
- Department of Health Sciences, Università del Piemonte Orientale & IRCAD, Novara, Italy
| | - Simone Puccio
- Institute of Biomedical Technologies, National Research Council, Segrate, Milan, Italy
| | - Giada Caredda
- Institute of Biomedical Technologies, National Research Council, Segrate, Milan, Italy
| | - Giorgio Grillo
- Institute of Biomedical Technologies, National Research Council, Bari, Italy
| | | | - Arianna Consiglio
- Institute of Biomedical Technologies, National Research Council, Bari, Italy
| | - Paolo Edomi
- Department of Life Sciences, University of Trieste, Italy
| | - Claudio Santoro
- Department of Health Sciences, Università del Piemonte Orientale & IRCAD, Novara, Italy
| | | | - Clelia Peano
- Institute of Genetic and Biomedical Research, National Research Council, Rozzano, Milan, Italy; Humanitas Clinical and Research Center, Rozzano, Milan, Italy;
| |
Collapse
|
8
|
Systematic autoantigen analysis identifies a distinct subtype of scleroderma with coincident cancer. Proc Natl Acad Sci U S A 2016; 113:E7526-E7534. [PMID: 27821747 DOI: 10.1073/pnas.1615990113] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Scleroderma is a chronic autoimmune rheumatic disease associated with widespread tissue fibrosis and vasculopathy. Approximately two-thirds of all patients with scleroderma present with three dominant autoantibody subsets. Here, we used a pair of complementary high-throughput methods for antibody epitope discovery to examine patients with scleroderma with or without known autoantibody specificities. We identified a specificity for the minor spliceosome complex containing RNA Binding Region (RNP1, RNA recognition motif) Containing 3 (RNPC3) that is found in patients with scleroderma without known specificities and is absent in unrelated autoimmune diseases. We found strong evidence for both intra- and intermolecular epitope spreading in patients with RNA polymerase III (POLR3) and the minor spliceosome specificities. Our results demonstrate the utility of these technologies in rapidly identifying antibodies that can serve as biomarkers of disease subsets in the evolving precision medicine era.
Collapse
|
9
|
Patrucco L, Peano C, Chiesa A, Guida F, Luisi I, Boria I, Mignone F, De Bellis G, Zucchelli S, Gustincich S, Santoro C, Sblattero D, Cotella D. Identification of novel proteins binding the AU-rich element of α-prothymosin mRNA through the selection of open reading frames (RIDome). RNA Biol 2016; 12:1289-300. [PMID: 26512911 DOI: 10.1080/15476286.2015.1107702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
We describe here a platform for high-throughput protein expression and interaction analysis aimed at identifying the RNA-interacting domainome. This approach combines the selection of a phage library displaying "filtered" open reading frames with next-generation DNA sequencing. The method was validated using an RNA bait corresponding to the AU-rich element of α-prothymosin, an RNA motif that promotes mRNA stability and translation through its interaction with the RNA-binding protein ELAVL1. With this strategy, we not only confirmed known RNA-binding proteins that specifically interact with the target RNA (such as ELAVL1/HuR and RBM38) but also identified proteins not previously known to be ARE-binding (R3HDM2 and RALY). We propose this technology as a novel approach for studying the RNA-binding proteome.
Collapse
Affiliation(s)
- Laura Patrucco
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy
| | - Clelia Peano
- b Institute of Biomedical Technologies; National Research Council (ITB CNR) ; Milan , Italy
| | - Andrea Chiesa
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy
| | - Filomena Guida
- c Department of Life Sciences ; University of Trieste ; Italy
| | - Imma Luisi
- c Department of Life Sciences ; University of Trieste ; Italy
| | - Ilenia Boria
- d Department of Chemistry ; University of Milan ; Italy
| | - Flavio Mignone
- e Department of Sciences and Innovation ; Università del Piemonte Orientale ; Alessandria , Italy
| | - Gianluca De Bellis
- b Institute of Biomedical Technologies; National Research Council (ITB CNR) ; Milan , Italy
| | - Silvia Zucchelli
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy.,f Area of Neuroscience; SISSA ; Trieste , Italy
| | | | - Claudio Santoro
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy
| | - Daniele Sblattero
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy.,c Department of Life Sciences ; University of Trieste ; Italy
| | - Diego Cotella
- a Department of Health Sciences and Interdisciplinary Research Center on Autoimmune Diseases (IRCAD) ; Università del Piemonte Orientale ; Novara , Italy
| |
Collapse
|
10
|
Zantow J, Just S, Lagkouvardos I, Kisling S, Dübel S, Lepage P, Clavel T, Hust M. Mining gut microbiome oligopeptides by functional metaproteome display. Sci Rep 2016; 6:34337. [PMID: 27703179 PMCID: PMC5050496 DOI: 10.1038/srep34337] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 09/12/2016] [Indexed: 12/25/2022] Open
Abstract
Pathogen infections, autoimmune diseases, and chronic inflammatory disorders are associated with systemic antibody responses from the host immune system. Disease-specific antibodies can be important serum biomarkers, but the identification of antigens associated with specific immune reactions is challenging, in particular if complex communities of microorganisms are involved in the disease progression. Despite promising new diagnostic opportunities, the discovery of these serological markers becomes more difficult with increasing complexity of microbial communities. In the present work, we used a metagenomic M13 phage display approach to select immunogenic oligopeptides from the gut microbiome of transgenic mice suffering from chronic ileitis. We constructed three individual metaproteome phage display libraries with a library size of approximately 107 clones each. Using serum antibodies, we selected and validated three oligopeptides that induced specific antibody responses in the mouse model. This proof-of-concept study provides the first successful application of functional metaproteome display for the study of protein-protein interactions and the discovery of potential disease biomarkers.
Collapse
Affiliation(s)
- Jonas Zantow
- Technische Universität Braunschweig, Institute of Biochemistry, Biotechnology and Bioinformatics - Department for Biotechnology, Germany
| | - Sarah Just
- Technische Universität München, ZIEL Institute for Food and Health, Freising, Germany
| | - Ilias Lagkouvardos
- Technische Universität München, ZIEL Institute for Food and Health, Freising, Germany
| | - Sigrid Kisling
- Technische Universität München, ZIEL Institute for Food and Health, Freising, Germany
| | - Stefan Dübel
- Technische Universität Braunschweig, Institute of Biochemistry, Biotechnology and Bioinformatics - Department for Biotechnology, Germany
| | - Patricia Lepage
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Thomas Clavel
- Technische Universität München, ZIEL Institute for Food and Health, Freising, Germany
| | - Michael Hust
- Technische Universität Braunschweig, Institute of Biochemistry, Biotechnology and Bioinformatics - Department for Biotechnology, Germany
| |
Collapse
|
11
|
Gourlay LJ, Peano C, Deantonio C, Perletti L, Pietrelli A, Villa R, Matterazzo E, Lassaux P, Santoro C, Puccio S, Sblattero D, Bolognesi M. Selecting soluble/foldable protein domains through single-gene or genomic ORF filtering: structure of the head domain of Burkholderia pseudomallei antigen BPSL2063. ACTA ACUST UNITED AC 2015; 71:2227-35. [PMID: 26527140 DOI: 10.1107/s1399004715015680] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 08/21/2015] [Indexed: 11/10/2022]
Abstract
The 1.8 Å resolution crystal structure of a conserved domain of the potential Burkholderia pseudomallei antigen and trimeric autotransporter BPSL2063 is presented as a structural vaccinology target for melioidosis vaccine development. Since BPSL2063 (1090 amino acids) hosts only one conserved domain, and the expression/purification of the full-length protein proved to be problematic, a domain-filtering library was generated using β-lactamase as a reporter gene to select further BPSL2063 domains. As a result, two domains (D1 and D2) were identified and produced in soluble form in Escherichia coli. Furthermore, as a general tool, a genomic open reading frame-filtering library from the B. pseudomallei genome was also constructed to facilitate the selection of domain boundaries from the entire ORFeome. Such an approach allowed the selection of three potential protein antigens that were also produced in soluble form. The results imply the further development of ORF-filtering methods as a tool in protein-based research to improve the selection and production of soluble proteins or domains for downstream applications such as X-ray crystallography.
Collapse
Affiliation(s)
- Louise J Gourlay
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Clelia Peano
- Institute of Biomedical Technologies, National Research Council, Via Fratelli Cervi 93, 20090 Segrate, Italy
| | - Cecilia Deantonio
- Department of Health Sciences and IRCAD, University of Eastern Piedmont, Via Solaroli 17, 28100 Novara, Italy
| | - Lucia Perletti
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Alessandro Pietrelli
- Institute of Biomedical Technologies, National Research Council, Via Fratelli Cervi 93, 20090 Segrate, Italy
| | - Riccardo Villa
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Elena Matterazzo
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Patricia Lassaux
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Claudio Santoro
- Department of Health Sciences and IRCAD, University of Eastern Piedmont, Via Solaroli 17, 28100 Novara, Italy
| | - Simone Puccio
- Institute of Biomedical Technologies, National Research Council, Via Fratelli Cervi 93, 20090 Segrate, Italy
| | - Daniele Sblattero
- Department of Life Sciences, University of Trieste, Via Weiss 2, 34128 Trieste, Italy
| | - Martino Bolognesi
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy
| |
Collapse
|
12
|
Allen MD, Christie M, Jones P, Porebski BT, Roome B, Freund SMV, Buckle AM, Bycroft M, Christ D. Solution structure of a soluble fragment derived from a membrane protein by shotgun proteolysis. Protein Eng Des Sel 2015; 28:445-50. [PMID: 25877662 PMCID: PMC4661788 DOI: 10.1093/protein/gzv021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 02/16/2015] [Accepted: 03/09/2015] [Indexed: 11/14/2022] Open
Abstract
We have previously reported a phage display method for the identification of protein domains on a genome-wide scale (shotgun proteolysis). Here we present the solution structure of a fragment of the Escherichia coli membrane protein yrfF, as identified by shotgun proteolysis, and determined by NMR spectroscopy. Despite the absence of computational predictions, the fragment formed a well-defined beta-barrel structure, distantly falling within the OB-fold classification. Our results highlight the potential of high-throughput experimental approaches for the identification of protein domains for structural studies.
Collapse
Affiliation(s)
- Mark D Allen
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Mary Christie
- Department of Immunology, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, NSW 2010, Australia Faculty of Medicine, St Vincent's Clinical School, The University of New South Wales, Darlinghurst, Sydney, NSW 2010, Australia
| | - Peter Jones
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Benjamin T Porebski
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia
| | - Brendan Roome
- Department of Immunology, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, NSW 2010, Australia Faculty of Medicine, St Vincent's Clinical School, The University of New South Wales, Darlinghurst, Sydney, NSW 2010, Australia
| | - Stefan M V Freund
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Ashley M Buckle
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia
| | - Mark Bycroft
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK
| | - Daniel Christ
- Department of Immunology, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, NSW 2010, Australia Faculty of Medicine, St Vincent's Clinical School, The University of New South Wales, Darlinghurst, Sydney, NSW 2010, Australia
| |
Collapse
|
13
|
Deantonio C, Sedini V, Cesaro P, Quasso F, Cotella D, Persichetti F, Santoro C, Sblattero D. An Air-Well sparging minifermenter system for high-throughput protein production. Microb Cell Fact 2014; 13:132. [PMID: 25218288 PMCID: PMC4172861 DOI: 10.1186/s12934-014-0132-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 08/27/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Over the last few years High-Throughput Protein Production (HTPP) has played a crucial role for functional proteomics. High-quality, high yield and fast recombinant protein production are critical for new HTPP technologies. Escherichia coli is usually the expression system of choice in protein production thanks to its fast growth, ease of handling and high yields of protein produced. Even though shake-flask cultures are widely used, there is an increasing need for easy to handle, lab scale, high throughput systems. RESULTS In this article we described a novel minifermenter system suitable for HTPP. The Air-Well minifermenter system is made by a homogeneous air sparging device that includes an air diffusion system, and a stainless steel 96 needle plate integrated with a 96 deep well plate where cultures take place. This system provides aeration to achieve higher optical density growth compared to classical shaking growth without the decrease in pH value and bacterial viability. Moreover the yield of recombinant protein is up to 3-fold higher with a considerable improvement in the amount of full length proteins. CONCLUSIONS High throughput production of hundreds of proteins in parallel can be obtained sparging air in a continuous and controlled manner. The system used is modular and can be easily modified and scaled up to meet the demands for HTPP.
Collapse
|
14
|
Zhu J, Larman HB, Gao G, Somwar R, Zhang Z, Laserson U, Ciccia A, Pavlova N, Church G, Zhang W, Kesari S, Elledge SJ. Discovery of protein interactions using parallel analysis of translated ORFs (PLATO). Nat Protoc 2014; 9:90-103. [PMID: 24336473 PMCID: PMC4129458 DOI: 10.1038/nprot.2013.167] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Parallel analysis of translated open reading frames (ORFs) (PLATO) can be used for the unbiased discovery of interactions between full-length proteins encoded by a library of 'prey' ORFs and surface-immobilized 'bait' antibodies, polypeptides or small-molecular-weight compounds. PLATO uses ribosome display (RD) to link ORF-derived mRNA molecules to the proteins they encode, and recovered mRNA from affinity enrichment is subjected to analysis using massively parallel DNA sequencing. Compared with alternative in vitro methods, PLATO provides several advantages including library size and cost. A unique advantage of PLATO is that an alternative reverse transcription-quantitative PCR (RT-qPCR) protocol can be used to test binding of specific, individual proteins. To illustrate a typical experimental workflow, we demonstrate PLATO for the identification of the immune target of serum antibodies from patients with inclusion body myositis (IBM). Beginning with an ORFeome library in an RD vector, the protocol can produce samples for deep sequencing or RT-qPCR within 4 d.
Collapse
Affiliation(s)
- Jian Zhu
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| | - H. Benjamin Larman
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| | - Geng Gao
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| | - Romel Somwar
- Human Oncology and Pathogenesis Program, Memorial Sloan-Kettering Cancer Center, New York, NY
| | - Zijuan Zhang
- Department of Chemistry, University of Massachusetts Boston, Boston, MA
| | - Uri Laserson
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA
| | - Alberto Ciccia
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| | - Natalya Pavlova
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| | - George Church
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
| | - Wei Zhang
- Department of Chemistry, University of Massachusetts Boston, Boston, MA
| | - Santosh Kesari
- Division of Neuro-Oncology, Translational Neuro-Oncology Laboratories, Department of Neurosciences, U.C. San Diego, Moores Cancer Center, La Jolla, CA
| | - Stephen J. Elledge
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Boston, MA
- Department of Genetics, Harvard University Medical School, Boston, MA
- Howard Hughes Medical Institute
| |
Collapse
|
15
|
Gupta A, Shrivastava N, Grover P, Singh A, Mathur K, Verma V, Kaur C, Chaudhary VK. A novel helper phage enabling construction of genome-scale ORF-enriched phage display libraries. PLoS One 2013; 8:e75212. [PMID: 24086469 PMCID: PMC3785514 DOI: 10.1371/journal.pone.0075212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 08/08/2013] [Indexed: 11/19/2022] Open
Abstract
Phagemid-based expression of cloned genes fused to the gIIIP coding sequence and rescue using helper phages, such as VCSM13, has been used extensively for constructing large antibody phage display libraries. However, for randomly primed cDNA and gene fragment libraries, this system encounters reading frame problems wherein only one of 18 phages display the translated foreign peptide/protein fused to phagemid-encoded gIIIP. The elimination of phages carrying out-of-frame inserts is vital in order to improve the quality of phage display libraries. In this study, we designed a novel helper phage, AGM13, which carries trypsin-sensitive sites within the linker regions of gIIIP. This renders the phage highly sensitive to trypsin digestion, which abolishes its infectivity. For open reading frame (ORF) selection, the phagemid-borne phages are rescued using AGM13, so that clones with in-frame inserts express fusion proteins with phagemid-encoded trypsin-resistant gIIIP, which becomes incorporated into the phages along with a few copies of AGM13-encoded trypsin-sensitive gIIIP. In contrast, clones with out-of-frame inserts produce phages carrying only AGM13-encoded trypsin-sensitive gIIIP. Trypsin treatment of the phage population renders the phages with out-of-frame inserts non-infectious, whereas phages carrying in-frame inserts remain fully infectious and can hence be enriched by infection. This strategy was applied efficiently at a genome scale to generate an ORF-enriched whole genome fragment library from Mycobacterium tuberculosis, in which nearly 100% of the clones carried in-frame inserts after selection. The ORF-enriched libraries were successfully used for identification of linear and conformational epitopes for monoclonal antibodies specific to mycobacterial proteins.
Collapse
Affiliation(s)
- Amita Gupta
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
- * E-mail: (AG); (VKC)
| | - Nimisha Shrivastava
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Payal Grover
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Ajay Singh
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Kapil Mathur
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Vaishali Verma
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Charanpreet Kaur
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
| | - Vijay K. Chaudhary
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
- * E-mail: (AG); (VKC)
| |
Collapse
|
16
|
D'Angelo S, Mignone F, Deantonio C, Di Niro R, Bordoni R, Marzari R, De Bellis G, Not T, Ferrara F, Bradbury A, Santoro C, Sblattero D. Profiling celiac disease antibody repertoire. Clin Immunol 2013; 148:99-109. [DOI: 10.1016/j.clim.2013.04.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/09/2013] [Accepted: 04/10/2013] [Indexed: 02/07/2023]
|
17
|
Hart DJ, Waldo GS. Library methods for structural biology of challenging proteins and their complexes. Curr Opin Struct Biol 2013; 23:403-8. [PMID: 23602357 DOI: 10.1016/j.sbi.2013.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 03/18/2013] [Accepted: 03/19/2013] [Indexed: 02/08/2023]
Abstract
Genetic engineering of constructs to improve solubility or stability is a common approach, but it is often unclear how to obtain improvements. When the domain composition of a target is poorly understood, or if there are insufficient structure data to guide sited directed mutagenesis, long iterative phases of subcloning or mutation and expression often prove unsuccessful despite much effort. Random library approaches can offer a solution to this problem and involve construction of large libraries of construct variants that are analysed via screens or selections for the desired phenotype. Huge improvements in construct behaviour can be achieved rapidly with no requirement for prior knowledge of the target. Here we review the development of these experimental strategies and recent successes.
Collapse
Affiliation(s)
- Darren J Hart
- EMBL Grenoble Outstation and Unit of Virus Host-Cell Interactions, UMI3265 UJF-EMBL-CNRS, Grenoble, France.
| | | |
Collapse
|