| First Author | Rosshart S | Year | 2008 |
| Journal | Eur J Immunol | Volume | 38 |
| Issue | 12 | Pages | 3354-64 |
| PubMed ID | 19009530 | Mgi Jnum | J:141386 |
| Mgi Id | MGI:3818200 | Doi | 10.1002/eji.200838690 |
| Citation | Rosshart S, et al. (2008) Interaction of KLRG1 with E-cadherin: New functional and structural insights. Eur J Immunol 38(12):3354-3364 |
| abstractText | The killer cell lectin-like receptor G1 (KLRG1) is an inhibitory receptor expressed by memory T cells and NK cells in man and mice. It is frequently used as a cell differentiation marker and members of the cadherin family are ligands for KLRG1. The present study provides new insights into the interaction of mouse KLRG1 with E-cadherin. Firstly, we demonstrate that co-engagement of KLRG1 and CD3/TCR in a spatially linked manner was required for inhibition arguing against the notion that KLRG1-ligation per se transmits inhibitory signals. Secondly, experiments with T cells carrying Y(7)F-mutant KLRG1 molecules with a replacement of the tyrosine residue to phenylalanine in the single ITIM indicated that the inhibitory activity of KLRG1 is counteracted to some degree by increased interaction of KLRG1(+) T cells with E-cadherin expressing target cells. Thirdly, we demonstrate that deletion of the first or the second external domain of E-cadherin abolished reactivity in KLRG1-reporter cell assays. Finally, we made the intriguing observation that KLRG1 formed multimeric protein complexes in T cells in addition to the previously described mono- and dimeric molecules. |
