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Anti-Peptide EEY T cell receptor (LC13), pCDTCR1 (TCR-YC0892)


All products and services are For Research Use Only and CANNOT be used in the treatment or diagnosis of disease.

It was showed the LC13 T cell receptor (TCR), selected for recognition on self-HLA-B(*)0801 bound to a viral peptide, alloreacts with B44 allotypes (HLA-B(*)4402 and HLA-B(*)4405) bound to two different allopeptides. Despite extensive polymorphism between HLA-B(*)0801, HLA-B(*)4402, and HLA-B(*)4405 and the disparate sequences of the viral and allopeptides, the LC13 TCR engaged these peptide-HLA (pHLA) complexes identically, accommodating mimicry of the viral peptide by the allopeptide. The viral and allopeptides adopted similar conformations only after TCR ligation, revealing an induced-fit mechanism of molecular mimicry. The LC13 T cells did not alloreact against HLA-B(*)4403, and the single residue polymorphism between HLA-B(*)4402 and HLA-B(*)4403 affected the plasticity of the allopeptide.

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Details

  • Target
  • Peptide EEY
  • Epitope
  • EEYLKAWTF
  • Format
  • Non-Modified TCR
  • Allele
  • HLA-B*44:05
  • Vector Name
  • pCDTCR1
  • Vector Length
  • ~ 8 kb
  • Vector Type
  • Lentiviral vector
  • TCR Clone
  • LC13
  • Host Species
  • Human

Target

  • Introduction
  • Repeated rounds of sorting allowed expansion of HLA-B∗4405-positive cells expressing a ligand that bound LC13 TCR. Peptide insert sequences were obtained from 36 positive clones with 30 of these encoding the peptide EEYLKAWTF. Searching the human proteome for analogs of the EEYLKAWTF "mimotope" peptide identified two high-scoring matches (expect values of 283 and 65, respectively), each of 9 residues (EESLKDWYF and EEYLQAFTY) and therefore representing a potential natural "allotope." These peptides shared 66% (6/9 identical residues) with the mimotope and possessed the P2E, P9Y/F anchor residues, features of B44-binding peptides. The peptide EESLKDWYF is derived from an ATPase but little is known about its physiologic role and expression. The peptide EEYLQAFTY is derived from an ATP binding cassette protein ABCD3 involved in transport of fatty acids into the peroxisome.

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For research use only. Not intended for any clinical use. No products from Creative Biolabs may be resold, modified for resale or used to manufacture commercial products without prior written approval from Creative Biolabs.

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