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Global Sales Review September 2008. An Introduction to: SNAP-Tag Technologies Sal Russello, Ph.D. Andreas Brecht, Ph.D. Goals…. Discuss launch of new “Cellular Imaging and Analysis products” Discuss the core technology – a unique line of multi-functional tags
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Global Sales Review September 2008 An Introduction to: SNAP-Tag Technologies Sal Russello, Ph.D. Andreas Brecht, Ph.D.
Goals… • Discuss launch of new “Cellular Imaging and Analysis products” • Discuss the core technology – a unique line of multi-functional tags • Discuss the key products &applications – including live cell imaging • Discuss the potential customer base – primarily academic cell biologists • Hear from YOU – Challenges? Opportunities? What do you need from us?
The Basics… When, Where, What? • 80+ new Cellular Imaging and Analysis products “go live” December 10 • Based on a line of tagging technologies from Covalys Biosciences • Most of the 80 products were available from Covalys… they have been reformatted and manufactured by NEB and are NO LONGER available by Covalys… • NEB and Covalys announce an exclusive licensing arrangement in Dec • Product launch will occur at the American Society for Cellular Biology • All products are based on a core technology from Covalys Biosciences
Top Level Features & Benefits of the Technology • Enabling: investigate protein dynamics in live cells • Flexibility: widest range of applications with a single construct • Live cell imaging, fixed cell imaging, protein association, pulldowns, etc… • Covalent: Irreversible with defined stoichiometry
“Flagship Technology” – SNAP-tag Mechanism • Derived from O6 Alkylguanine-DNA Alkyltransferase (AGT) • Engineered to interact rapidly with BG-substrates • One SNAP-tag = One precisely localized covalent modification • One-way, suicide reaction – non-enzymatic, NO turnover Protein of interest SNAP-tag Benzylguanine Any type of label, or surface
Available Tags and Substrate Chemistries SNAP-tag (app 20kDa) CLIP-tag (app 20kDa) ACP-, MCP-tag (<20AA – 77AA) ACP- or SFP-Synthase
Available Tags and Substrate Chemistries Tags (cDNA) SNAP-tag (app 20kDa) Substrates (ex. fluors, beads) CLIP-tag (app 20kDa) Enzymes ACP-, MCP-tag (<20AA – 77AA) ACP- or SFP-Synthase
Why is it Useful? • Enables the study of “Protein Dynamics” – the study of changes in proteins, including localization, translocation, turnover, protein association, complex formation and the like. • Fundamental to academic cell biology and also of critical interest in the drug discovery arena. • Currently an emerging field, with a growing publication record and relatively few competitors. Academic/Industry sales currently at Covalys
Why is it Useful? “Basic” Market Dynamics • Market/trend indicator: publications on localizing proteins inside cells • Nobel prize awarded to GFP in 2008 – high visibility area Cumulative publications for GFP in “HighWire” an online scientific search engine since 2000 (50K)
What does a Typical “SNAP-tag” Customer Do? • Fluorescence and/or confocal microscopy, Typical filter sets • Intracellular: 488, 546, 430 nm • Extracellular: 488, 547, 647 nm Application breakdown by sales (estimated from Covalys sales). Will be complemented over time by pull-downs and in-gel assays
Technology Overview & Basic Workflow • Clone gene of interest into NEB expression vector • Transfect plasmid fusion into cells, protein is expressed in cells • Add label of interest • Covalent modification occurs, labeling protein • Visualize/Study 1. pSNAPm Gene of Interest 2. 4. 3.
Technology Overview & Basic Workflow • Clone gene of interest into NEB expression vector • Transfect plasmid fusion into cells, protein is expressed in cells • Add label of interest • Covalent modification occurs, labeling protein • Visualize/Study Live COS-7 cells expressing SNAP-Tubulin pSNAPm-Tubulin, SNAP-Cell TMR-Star
Immobilization Labeling in gels Labeling in vitro Labeling in cells Purification (next year) Live Animal Imaging Multi-Functional System NEB’sProtein Tags
Immobilization Labeling in gels Labeling in vitro Labeling in cells Purification (next year) Live Animal Imaging Multi-Functional System – With a VERY KEY Application NEB’sProtein Tags
Labeling in cells Purification (next year) Live Animal Imaging Multi-Functional System – With a VERY KEY Application Labeling in gels Labeling in vitro NEB’sProtein Tags Immobilization
GFP (28kDa) SNAP-tag (21kDa) How do SNAP-tag and GFP Differ? More to Come… • Multifunctional tagging tool • Color from added substrate • Fluorescent upon addition of substrate • Different substrate = Different color • Fixation does not affect fluorescence • Blocking agents available • Major use is live cell imaging • Color is genetically encoded • Always fluorescent • Must re-clone to change color • Not fluorescent after fixation • No blocking agents available
CHO-K1 CLIP-tag CLIP-Cell TMR-Star Localization of SNAP-tag and CLIP-tag in Live Cells SNAP-tag labeling COS-7 • A useful protein tag will be localized to the appropriate sub-cellular localization of it’s fusion partner. • When SNAP-tag and CLIP-tag are expressed in cells, they are localized to the cytoplasm and the nucleus. SNAP-tag SNAP-Cell TMR-Star CLIP-tag labeling
Localization of SNAP-tag and CLIP-tag in Live Cells SNAP-tag labeling U-2 OS COS-7 • When SNAP-tag and CLIP-tag are fused to proteins with varied subcellular localizations, they appropriately localize (ex. surface, nucleus, mitrochondrial membrane, etc) SNAP-Tubulin, SNAP-Cell TMR-Star SNAP-ENDA-R SNAP-Surface 488 CLIP-tag labeling CHO-K1 CHO-K1 CLIP-NK1R CLIP-Surface 488 H2B-CLIP CLIP-Cell TMR-Star
Live Cell Staining Overview – A Simple Protocol • Dilute stock solution 1:200 in media to yield 5 uM labeling solution • Replace media on cells expressing SNAP-tag fusion, incubate 30 minutes • Wash cells 3x, incubate in fresh media for 30 minutes • Image using appropriate filter sets Cells treated with labeling media Replace with standard media, 30 minute incubation Wash 3x Incubate Image Keppler A. et al Nat Biotech 2003
Plasmid – Cloning Details • pSNAPm • snap26 gene, derived from human AGT • N-terminal fusion: ClaI, EcoRV (Blunt), EcoRI • C-terminal fusion: SbfI, AscI, BamHI, XhoI • pCLIPm • clip10 gene, derived from pSNAPm • Same sites as pSNAPm SNAP CLIP Gene of Interest Gene of Interest SNAP CLIP
Plasmid – Cloning Details • pACPm • Derived from E. coli Acyl Carrier Protein • N-terminal fusion: SacI, SacII, NotI, EcoRV, HindIII • C-terminal fusion: SbfI, AscI, BamHI • pMCPm • Derived from pACPm (D36T, D39G mutations) • Same sites as pACPm ACP MCP Gene of Interest Gene of Interest ACP MCP
SNAP-Cell & CLIP-Cell Products • Features and Benefits • Cell permeable fluorophores • Suitable for intracellular labeling • Largest diversity of fluors available • Blocking agents available • RecommendedApplications • Live cell imaging (intracellular proteins) • Pulse chase studies • Protein localization and translocation • Fixed cell labeling
SNAP-, CLIP-Cell App – Intracellular Protein Trafficking Addition of substrate Cells expressing ERK2-CLIP labeled with CLIP-Cell TMR-Star (ERK2-CLIP is nuclear) Diffusion into cells PROTEIN DYNAMICS Cells expressing ERK2-CLIP labeled with CLIP-Cell TMR-Star and MEK1 (ERK2-CLIP re-localizes to the cytoplasm) Covalent attachment • Take Home Message… • Investigators can examine dynamic re-localization of proteins under a variety of stimuli Protein re-localization
SNAP-, CLIP-Surface Products • Features and Benefits • Non-permeable fluorophores • Suitable for cell “surface” labeling • Largest diversity of fluors available • Blocking agents available • RecommendedApplications • Live cell imaging of surface proteins • Receptor internalization • Fixed cell labeling • Biochemical assays • Flow cytometry
SNAP-, CLIP-, ACP-Surface App – Receptor Internalization Addition of substrate Untreated cells (membrane localized GPCR) Covalent attachment RECEPTOR INTERNALIZATION Receptor internalization Stimulated cells (internalized receptors)
SNAP-, CLIP-, ACP-Surface App – Receptor Internalization Addition of substrate Untreated cells expressing SNAP-ADRb2 labeled with SNAP-Surface 488 (surface localized GPCR) Covalent attachment PROTEIN DYNAMICS Receptor internalization Stimulated cells expressing SNAP-ADRb2 labeled with SNAP-Surface 488 (internalized receptors) • Take Home Message… • Investigators can examine dynamic re-localization of proteins under a variety of stimuli
Simultaneous Live Cell Labeling Using SNAP-and CLIP-tag SNAP-Cell 505 & CLIP-Cell TMR-Star CLIP-Cell TMR-Star SNAP-Cell 505 2. CLIP-MEK1 1. H2B-SNAP H2B-SNAP & CLIP-MEK1 • Take Home Message… • Simultaneous dual labeling of two proteins with a single system… Proteins are free to re-localize and are visualized BC BG
ACP-Surface Products • Features and Benefits • Non-permeable fluorophores • Very low background staining • Suitable for “surface” staining • Blocking agents available • RecommendedApplications • Live cell imaging of surface proteins • Receptor internalization • Fixed cell staining • Biochemical assays • Take Home Message… • Investigators can label sensitive membrane proteins (ex. ion channels) COS7 cells expressing ACPwt-tag-GPI anchor fusion, labeled with CoA-647, counterstained with Hoechst 33342 (blue).
SNAP-, CLIP-Vista & Biotin Products • Features and Benefits • Simple protocol • Suitable for use with many gel scanners • RecommendedApplications • Alternative to western blotting • Routine/High throughput analysis • Take Home Message… • Simple and rapid quantification of proteins in lysates • Features and Benefits • Flexible, compatible with streptavidin • RecommendedApplications • Multiple – cellular and biochemical • Apply proteins to streptavidin plates, etc
Resins and Magnetic Beads • Features and Benefits • Covalent interaction between fusion-protein and resin • Insensitive to repeated washing • RecommendedApplications • Protein pull-downs • Proteomic analysis of protein-protein interactions • Amenable to high throughput analysis • Protein purification (next year) • Take Home Message… • Pull-down assays to start… purification is coming…
SNAP-Cell Block + - + - MDM2 (Purified) MDM2 (Lysate) Protein Pull-downs Using SNAP-Capture Products SNAP-MDM2 + SNAP-Surface 488 SNAP-p53 + SNAP-Capture p53 p53 Sepharose Sepharose Mix Spin Wash Detect complex in SDS-Page or other fluorescent readout 488 488 MDM2 MDM2
HTS Binding Assays Using SNAP-tag Technologies FKBP-SNAP + SNAP-Biotin Streptavidin-coated plate Rapamycin R FKBP FKBP FRB-SNAP + SNAP-Surface 488 Biotin Biotin FKBP R Biotin 488 488 FRB FRB
100 No lysate Labeling in lysate 80 60 Normalized Fluorescence 40 20 0 log (Rapamycin concentration [M]) -6 -9 -8 -7 -5 HTS Binding Assays Using SNAP-tag Technologies No interaction No fluorescence Rapamycin induced FKBP/FRB interaction FKBP Inhibition of rapamycin-mediated FKBP/FRB interaction by ascomycin Biotin Rapamycin mediated interaction Relative Fluorescence Units log (Ascomycin concentration [M]) FKBP R Biotin 488 FRB
Building Blocks – For Advanced Customers Only • Features and Benefits • Do-it-yourself chemistry • Couple to fluorophores or novel chemistry • Recommended to experienced users • RecommendedApplications • Same as other products – and much more • Take Home Message… • Mainly for advanced customers interested in technology development…
Time Time Time SNAP-tag & CLIP-tag to Follow Dynamic Processes • Single Pulse of Label: Follow protein fate over time • Blocking: Select a particular “timeslice” of protein • Pulse-Chase: “Pulse”, then “chase” in another color to investigate dynamic processes
Time Single pulse of label – follow protein fate over time Pulse-Labeling to Detect Protein Lifetime • Protein homeostasis: Labeling of SNAP-tag PLB and SERCA1a fusion proteins with a “pulse" of BG-Fluorescein • Results: PLB - Significant reduction in fluorescence over 24 hrs SERCA1a – Little reduction in fluorescence over 24 hrs D. L. Stenoien et al, Am. J. Physiol. Feb. 2007
Time Do pulse-chase labeling in different colors to investigate dynamic processes Pulse - Chase to Observe Protein Trafficking • Pulse-Chase: Labeling of SNAP-tag PLB and SERCA1a fusion proteins with a “pulse" of BG-TMR-Star and “chase” with BG-505 • Results: PLB – Newly synthesized protein localizes to perinuclear area () • SERCA1a – No evidence of cellular trafficking with time D. L. Stenoien et al, Am. J. Physiol. Feb. 2007
Other Applications... Limitless! • “Custom” technology development using building blocks… • Ex. localizing a novel zinc dependent fluorophore (ZP1) • Results: New application showing where zinc is localized in living cells… ZP1BG + + + + Zinc + + Zinc chelator +
Existing Publications… More to Come… SNAP-tag & CLIP-tag based protein labeling Gautier A. et al.:"An Engineered Protein Tag for Multiprotein Labeling in Living Cells". Chemistry & Biology 15, Feb 2008, pp. 128-136 Schulz C. and Köhn M.:"Simultaneous Protein Tagging in Two Colors", Chemistry & Biology 15, Feb 2008 Damien et al.: "Cell-surface protein-protein interaction analysis with time-resolved FRET and SNAP-tag technologies: application to GPCR oligomerization". Nature Methods. (Published online 18 May 2008), DOI: 10.1038/NMETH.1213 Mao et al.: "Optical lock-in detection of fluorescence resonance entergy transfer using synthetic and genetically encoded optical switches". Biophys J BioFAST. (June 2008), Volume 94(11), pp. 4515-24 Banala et al.: "Caged Substrates for Protein Labeling and Immobilization". Chembiochem. (Jan 2008), Volume 4;9(1), pp. 38-41 Pick H, et al.: "Distribution Plasticity of the Human Estrogen Receptor alpha in Live Cells: Distinct Imaging of Consecutively Expressed Receptors". J Mol Biol. (October 10, 2007), /Epub ahead of Print) Stenoien D. L. et al.: "Cellular Trafficking of Phospholamban and Formation of Functional Sarcoplasmic Reticulum during Myocyte Differentiation" Am J Physiol Cell Physiol (Feb 7, 2007) Jansen L. et al.: "Propagation of centromeric chromatin requires exit from mitosis" Journal of Cell Biology (March 2007); 12; 176(6): pp. 735-6. Böhme, I. et al.: "Tracking of human Y receptors in living cells – A fluorescent approach”; Peptides 28 (2007); pp. 226-234 Keppler A. et al.: "Fluorophores for live cell imaging of AGT fusion proteins across the visible spectrum" BioTechniques (Aug 2006); 41(2), pp. 167-70, 172, 174-5 Krayl M. et al.: "Fluorescence-mediated analysis of mitochondrial preprotein import in vitro" Anal Biochem (Aug 2006); 335(1), pp. 81-9 Gronemeyer T. et al.: "Directed evolution of O6-alkylguanine-DNA alkyltransferase for applications in protein labeling" Prot Eng Des Sel (Jul 2006); 19(7), pp. 309-16 Tirat A. et al.: “Evaluation of two novel tag-based labeling technologies for site-specific modification of proteins” Int J Biol Macromol (Aug 2006); 39(1-3), pp. 66-76 Regoes A. et al.: "SNAP-tag mediated live cell labeling as an alternative to GFP in anaerobic organisms" BioTechniques (Dec 2005); 39(6), pp. 809-12 Keppler A. et al.: "Labeling of fusion proteins with synthetic fluorophores in live cells" PNAS (2004); 101, pp. 9955-9 Kindermann M. et al.: "Synthesis and characterization of bifunctional probes for the specific labeling of fusion proteins" Bioorg Med Chem Lett (2004); 14, pp. 2725-8 Keppler A. et al.: "Labeling of fusion proteins of O(6)-alkylguanine-DNA alkyltransferase with small molecules in vitro and in vivo" Methods (2004); 32, pp. 437-44 Juillerat A. et al.: "Directed evolution of O(6)-alkylguanine-DNA alkyltransferase for efficient labeling of fusion proteins with small molecules in vivo" Chem Biol (2003); 10, pp. 313-7 Keppler A. et al.: "A general method for the covalent labeling of fusion proteins with small molecules in vivo" Nature Biotechnology (2003); 21, pp. 86-9 SNAP-tag used for protein immobilization Gronemeyer Th. et al.: „A new pull-down assay to monitor protein-protein interactions” HUPO-2007 poster contribution Jongsma M. A. and Litjens R. H.: "Self-assembling protein arrays on DNA chips by auto-labeling fusion proteins with a single DNA address" Proteomics (May 2006); 6(9), pp. 2650-5 Sielaff I. et al.: "Protein function microarrays based on self-immobilizing and self-labeling fusion proteins" ChemBioChem (Jan 2006); 7(1), pp. 194-202 Kufer S. K. et al.: "Covalent immobilization of recombinant fusion proteins with hAGT for single molecule force spectroscopy" Eur Biophys J (2005); 35(1), pp. 72-8 Tugulu S. et al.: "Protein-Functionalized Polymer Brushes" Biomacromolecules (2005); 6(3), pp. 1602-7 Huber W. et al.: "SPR-based interaction studies with small molecular weight ligands using hAGT fusion proteins" Anal Biochem (2004); 333(2), pp. 280-8 Kindermann M. et al.: "Covalent and selective immobilization of fusion proteins" JACS (2003); 125(26), pp. 7810-1 SNAP-tag - other applications Lemercier, G. et al.: "Inducing and Sensing Protein–Protein Interactions in Living Cells by Selective Cross-linking" Angew Chem Int Ed (2007); 46, in press (DOI:10.1002/anie.200700408) Gendreizig, S. et al.: "Induced protein dimerization in vivo through covalent labeling" JACS (2003); 125(49), pp. 14970-1 Reviews and background papers on Covalys’ technology Johnsson N. et al.: "Protein chemistry on the surface of living cells" ChemBioChem (2005); 6(1), pp. 47- 52 (Review) Gronemeyer T. et al: "Adding value to fusion proteins through covalent labeling" Curr Opin Biotechnol (Aug 2005); 16(4), pp. 453-8 Michnick, S. W.: " Research Focus: Proteomics in Living Cells” Drug Discovery Today (Mar 2004); 9(6), pp. 262-7 Johnsson N. and Johnsson K.: "A fusion of disciplines: chemical approaches to exploit fusion proteins for functional genomics" ChemBioChem (Sep 5, 2003); 4(9), pp. 803-10 ACP-tag Zhou Z. et al.: "Genetically Encoded Short Peptide Tags for Orthogonal Protein Labeling by Sfp and AcpS Phosphopantetheinyl Transferases" ACS Chemical Biology Vol. 2 (5),(2007) pp. 337-346 Jacquier V. et al.: "Visualizing receptor trafficking in living cells down to the single-molecule level" PNAS (Sep 2006); 103(39), pp. 14325-30 Prummer M. et al.: "Post-translational covalent labeling reveals heterogeneous mobility of individual G protein-coupled receptors in living cells" ChemBioChem (2006); 7, pp. 908-11 Meyer B. H. et al.: "Covalent labeling of cell-surface proteins for in-vivo FRET studies" FEBS Letters (Mar 2006); 580(6), pp. 1654-8 Meyer B. H. et al.: "FRET imaging reveals that functional neurokinin-1 receptors are monomeric and reside in membrane microdomains of live cells" PNAS (Feb 14, 2006); 103(7), pp. 2138-43 Sielaff I. et al.: "Protein function microarrays based on self-immobilizing and self-labeling fusion proteins" ChemBioChem (Jan 2006); 7(1), pp. 194-202 Vivero-Pol L. et al.: "Multicolor imaging of cell surface proteins" JACS (2005); 127(37), pp. 12770-1 Yin J. et al.: "Single-Cell FRET Imaging of Transferrin Receptor Trafficking Dynamics by Sfp-Catalyzed, Site-Specific Protein Labeling" Chem Biol (2005); 12(9), pp. 999-1006 Cravatt B. F. Comment: "Live Chem. Repts from Cell Surface" Chem Biol (2005); 12(9), pp. 954-956 George N. et al.: "Spec. lblg of cell surf. Prot. w. chem. diverse cmpds" JACS (2004); 126, pp. 8896-7 Yin J. et al.: "Lblng prot. w. small molec. by site-spec. posttransl. mod." JACS (2004); 126, pp. 7754-5 La Clair J. J. et al.: "Manip. of carrier prot. in antibiotic biosynth" Chem Biol (2004); 11(2), pp. 195-201 • vs. Competition • vs. GFP… much LESS – more to do! • vs. Halo-tag, LigandLink, Lumio = More!
Competitive Landscape • GFP – Dominant in publications and free for academics. • Antibodies – Great in fixed cells but can’t be used in lived cells. • Other chemical labeling approaches? Yes, but few publications…