QuickSwitch™ Custom Tetramer Kits

Fast, High-Quality Generation of New Tetramer Specificities

Rapid, high-quality creation of custom class I MHC tetramers in your own lab is now a reality! Create new specificity tetramers in just a few hours with QuickSwitch™, a proprietary technology for exchanging peptides on an MHC tetramer.  With this kit, you will receive MHC allele with an irrelevant peptide bound.  The addition of a peptide exchange factor, and your peptide of interest, results in the creation of your custom MHC tetramer ready to use- all in one day.   The QuickSwitch™ Quant Tetramer Kit can quantify the exchange with the new peptide, thereby gathering binding affinity information for the MHC/peptide complex.  QuickSwitch can be used to generate custom MHC tetramers, or to screen numerous peptides.  This kit can be used for purposes such as epitope discovery, neoantigen vaccine research, verification of T cell staining using the new peptide specific tetramer, and more.

Functional screening of peptides for MHC class I binding is essential for vaccine design and immune monitoring.  This 90-min-assay kit allows discrimination of MHC binding from non-binding peptides.  This is particularly essential for the screening of immunogenic peptides from infectious agents or cancer neoantigens.  Tetramers resulting from peptide exchange with selected peptides can then be used for immune monitoring.  QuickSwitch kits are optimized for up to 10 peptide exchanges and multiple tests per resulting tetramer.

Peptide exchange, quantification, cell staining, and flow cytometry analysis can all be performed in one day!

High Throughput Immunogenic Peptide Discovery and Validation in 90 min.

  • Validate MHC binding peptides from in silico selected list of candidate peptides
  • Generate new specificity tetramers for immune monitoring
  • Perform functional stability studies for MHC binding peptides
  • Compare epitopes to rank better binders and perform epitope mapping

Top QuickSwitch™ Products

Class I

Product DescriptionAlleleConjugates AvailableQuantification Included
QuickSwitch™ Quant HLA-A*02:01 Tetramer KitHLA-A*02:01PEAPCBV421Yes
QuickSwitch™ Quant HLA-A*03:01 Tetramer KitHLA-A*03:01PE, APC, BV421Yes
QuickSwitch™ Quant HLA-A*11:01 Tetramer KitHLA-A*11:01PEAPCBV421Yes
QuickSwitch™ Quant HLA-A*24:02 Tetramer KitHLA-A*24:02PE, APCBV421Yes
QuickSwitch™ Quant H-2 Kb Tetramer KitH-2KbPEAPCBV421Yes
QuickSwitch™ HLA-A*02:01 Peptide Screening KitHLA-A*02:01Yes

High Throughput Immunogenic Peptide Discovery and Validation in 90 min

QuickSwitch Platform Capabilities

  • Validate MHC binding peptides from in silico selected list of candidate peptides
  • Generate new specificity tetramers for immune monitoring
  • Perform functional stability studies for MHC binding peptides
  • Compare epitopes to rank better binders and perform epitope mapping                             

QuickSwitch™ HLA-A*02:01 tetramers detect similar percentages of low and high affinity CMV responses in PBMCs as classically folded tetramers

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QuickSwitch™ Quant Kit can be used to assess peptide exchange so that you can select peptides with appropriate affinities to make functional tetramers prior to cell staining. In a study where HLA-A*02:01 QuickSwitch™ tetramer was incubated for 4 hours with two Mart-1 related peptides at a final of 20 μM in presence of peptide exchange factor #1, peptide exchange correlated with the theoretical peptide affinity of each peptide towards HLA-A*02:01.

QuickSwitch™ Quant Kit components:

  • Tetramer with an irrelevant exchangeable peptide in the MHC groove
  • A peptide exchange factor for catalyzing the peptide exchange reaction
  • A high affinity MHC-binding reference peptide used as peptide exchange positive control
  • FITC conjugated antibody specific of the exiting peptide
  • Magnetic beads conjugated with anti MHC antibody for tetramer capture
  • An Assay Buffer for diluting reagents and washing steps

Webinar – Immune Monitoring with MHC Tetramers and QuickSwitch™ Rapid Tetramer Technology

H2-Kb Peptide-exchanged tetramers perform similarly to classically folded tetramers

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H-2 Kb TRP2 used a negative control (#TB-5004-2; green), classically folded H-2 Kb OVA (#TB-5001-2; blue), and H-2 Kb QuickSwitch™ OVA (red) tetramer staining.

QuickSwitch™ HLA-A*24:02 tetramers perform similarly to classically folded tetramers

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Data show CD3+ PBMCs stained with classically folded tetramers (A,E) or with QuickSwitch™ tetramers obtained by peptide exchange with the HLA-A*24:02 CMV peptide (B,C,D) or the HIV negative control peptide (F,G,H). 2 x 105 cells in 50 μL PBS-BSA-NaN3 buffer were stained for 30 min at RT with 1 μL of anti CD3-PC5.5 mAb (clone OKT3), 1 μL anti CD8-FITC (clone RPA-T8) (MBL) and 0.25 μg tetramer. Cells were fixed with a 0.5% formaldehyde PBS solution. Cells were analyzed on a Cytoflex S flow cytometer (Beckman Coulter). Cell doublets were discriminated using SSC-W/SSC-A gating.

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References

  1. Kula, T., Dezfulian, M. H., Wang, C. I., Abdelfattah, N. S., Hartman, Z. C., Wucherpfennig, K. W., … Elledge, S. J. (2019). T-Scan: A Genome-wide Method for the Systematic Discovery of T Cell Epitopes. Cell, 178(4).Available at:  https://www.ncbi.nlm.nih.gov/pubmed/31398327
  2. Christof C. Smith, Shengjie Chai, Amber R. Washington, Samuel J. Lee, Elisa Landoni, Kevin Field, Jason Garness, Lisa M. Bixby, Sara R. Selitsky, Joel S. Parker, Barbara Savoldo, Jonathan S. Serody, and Benjamin G. Vincent (2019) Machine-Learning Prediction of Tumor Antigen Immunogenicity in the Selection of Therapeutic Epitopes. Available at:  https://cancerimmunolres.aacrjournals.org/content/early/2019/09/11/2326-6066.CIR-19-0155