Structural basis for the killing of human beta cells by CD8(+) T cells in type 1 diabetes.
Structural basis for the killing of human beta cells by CD8(+) T cells in type 1 diabetes.
复制标题
1型糖尿病中CD8(+)T细胞杀死人β细胞的结构基础。
DOI:
10.1038/ni.2206
复制
发表时间:
2012-01-15
影响因子:
30.5
通讯作者:
中科院分区:
文献类型:
--
作者:
The structural characteristics of autoreactive-T cell receptor (TCR) engagement of major histocompatability (MHC) class II-restricted self-antigens is established, but how autoimmune-TCRs interact with self-MHC class I has been unclear. We examined how CD8+ T cells kill human islet β-cells, in Type-1 diabetes, via autoreactive-TCR (1E6) recognition of an HLA-A*0201-restricted glucose-sensitive preproinsulin peptide. Rigid ‘lock-and-key’ binding underpinned the 1E6-HLA-A*0201-peptide interaction, whereby 1E6 docked similarly to most MHCI-restricted TCRs. However, this interaction was extraordinarily weak, due to limited contacts with MHCI. TCR binding was highly peptide-centric, dominated by two CDR3-loop-encoded residues, acting as an ‘aromatic-cap’, over the peptide MHCI (pMHCI). Thus, highly focused peptide-centric interactions associated with suboptimal TCR-pMHCI binding affinities might lead to thymic escape and potential CD8+ T cell-mediated autoreactivity.
登录
查看更多内容
DOI:
10.4049/jimmunol.1003150
发表时间:
2011-03-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Borbulevych OY;Piepenbrink KH;Baker BM
通讯作者:
Baker BM
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1093/protein/gzg087
发表时间:
2003-09-01
期刊:
PROTEIN ENGINEERING
影响因子:
--
作者:
Boulter, JM;Glick, M;Jakobsen, BK
通讯作者:
Jakobsen, BK
影响因子:
64.5
作者:
Colf, Leremy A.;Bankovich, Alexander J.;Garcia, K. Christopher
通讯作者:
Garcia, K. Christopher
影响因子:
30.5
作者:
通讯作者:
--