Getting the Most Out of Baculovirus. Linda Lua
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1 Getting the Most Out of Baculovirus Linda Lua
2
3 Enabling World Class Research Recombinant Protein Production Discovery, Translational, Preclinical Drug discovery, vaccinology, diagnostics, functional materials, targeting and delivery, therapeutics, bioprocess development, agricultural science Research Training Up-skill professional development Tailored workshops and symposium Consultation
4 Verified Construct Scale-up Expression Protein Purification & Analysis HTP Expression Screening Design & HTP Molecular Cloning A focus of expertise in protein research and a research emphasis on platform technologies
5 Which Way Should I Go?
6 Types of Recombinant Protein Enzymes Glycoproteins Cytokines/interleukins Kinases Transcription factors Structural proteins Membrane proteins Receptors Viral proteins Recombinant peptides
7 Army Malaria Institute
8 International Academic & Industry Brazil Germany New Caledonia New Zealand North America Malaysia Singapore United Kingdom >1000s expression constructs >100s proteins Simple biomolecules to complex multi-protein assemblies Australia 16 Australian universities 11 Government research organizations 13 Companies
9 Baculovirus Technology 1980s Occasional production of difficult to express proteins Rescue projects Technology enhancement Automation High-throughput 2014 A major expression tool in most pharma/biotech labs 50-60% proteins expressed using baculo Vaccines and gene delivery system
10 LOW% HIGH% SPEED% MAMMALIAN% BACULO8INSECT%CELL% YEAST% BACTERIA% CELL8FREE% COST% CELL8FREE% BACTERIA% YEAST% BACULO8INSECT%CELL% MAMMALIAN% TYPICAL%YIELD% CELL8FREE% MAMMALIAN% BACULO8INSECT%CELL% BACTERIA% YEAST% POST% % TRANSLATION% MODIFICATION% BACTERIA% CELL8FREE% YEAST% BACULO8INSECT%CELL% MAMMALIAN% FDA%APPROVAL% CELL8FREE% BACULO8INSECT%CELL% YEAST% BACTERIA% MAMMALIAN%
11 Dengue viral proteins Malaria proteins TB proteins Hendra viral proteins Receptors and ligands Ion channels Kinases Glycoproteins Enzymes Interleukins Hemagglutinin H1, H5, H10 wild-type & mutants Virus-like particles chimeric VLP rbaculovirus 100s recombinant proteins produced in this system Influenza VLP HPV VLP
12 HTP Baculovirus/Insect Cell Platform Cloning 96-well Recombination 24-well Virus amplification 24-deep well 1 week Day 0 Day 7 Expression analysis Expression screening 24-deep well Day 13 Day 10
13 Common Challenges for Secreted Proteins Low expression/secretion Large volume of supernatant Poor target protein recovery and purity Contaminating host proteins
14 Media: Sf900II P3 virus stock MOI 5 TOI hi5-1.5x10 6 cells/ml TOI Sf9-3x10 6 cells/ml
15
16 FlashBACGOLD Bac to Bac HBM gp67 HBM gp67 27 o C 21 o C High Five gp67 Bac to Bac - 21 o C FlashBACGOLD Δv-cath ΔchiA- 27 o C
17 Ni Sepharose Excel Bind-Elute
18 Stability of Virus Stock P3 P4 P5 P6 P7 P8
19 Virus-Like Particle (VLP)
20 Simple to Complex Virus-Like Particles Single layer Multiple layers Non-enveloped Enveloped
21 Expert Rev. Vaccines 9(10), (2010)
22 Enteroviruses Hand Foot and Mouth Disease (HFMD) Poliomyelitis
23 Enterovirus Genome and Viral Structure
24 Enterovirus-like Particles as Vaccines Virus-like particle (VLP) resemble virus Non-infectious as without genetic material Produce using insect cells Co-expression of polyprotein (P1) and protease (for processing of polyprotein into structural proteins) Assembly of structural proteins in VLPs in cells
25 Flow fractionation (AF4) Velocity Size Distribution % MALS, UV & RI Crossflow Process: 1. Sample enters chamber. 2. Crossflow drags particles to membrane 3. Particles diffuse back into flow (rate based on size). Membrane size 4. Smaller particles flow faster than larger particles due to laminar flow. 5. UV, MALS & RI used to determine size distribution
26 Analysis by field-flow fractionationvlps Aggregates Misformed VLPs VLPs Misformed VLPs Chuan et al., Biotech Bioeng 2008 Aggregates
27 Biophysical Characterization TEM analysis: Diameter nm DLS analysis: Diameter - 32 nm 1.2" 110" UV'absorbance'(rela4ve'scale)' 1" 0.8" 0.6" 0.4" Soluble"" Proteins" VLPs" Misformed"" VLPs" 100" 90" 80" 70" 60" 50" 40" 30" Radius'(nm)' 0.2" Aggregates" 20" 10" 0" 0" 0" 10" 20" 30" 40" 50" 60" Time'(min)' AF4 analysis: Diameter - 30 nm
28 Modular VLP Vaccine Design 28 Virus-like particle VP1 Modular VP1 Modular capsomere (5 VP1) Modular VLP (72 capsomeres)
29 Modular VLP Vaccine Design Correct epitope presentation is crucial to induce immune response against target pathogen 2. Module insertion must not disrupt capsomere structure Modular VP1 Computational tools to design and predict modular vaccine candidates, test using insect cells
30 Modular VLP Vaccine Design 30 Virus-like particle VP1 Modular VP1 Modular capsomere (5 VP1) Modular VLP (72 capsomeres)
31 The Future FLU
32 A focus of expertise in protein research and a research emphasis on platform technologies Our track record Our expertise Our capabilities Our platform Chancellor s Award for Team Excellence 2013
33 THANK YOU
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