ERAAP and tapasin independently edit the amino and carboxyl termini of MHC class I peptides.
ERAAP and tapasin independently edit the amino and carboxyl termini of MHC class I peptides.
复制标题
DOI:
10.4049/jimmunol.1301043
复制
发表时间:
2013-08-15
期刊:
影响因子:
--
通讯作者:
Shastri N
中科院分区:
文献类型:
--
作者:
Kanaseki T;Lind KC;Escobar H;Nagarajan N;Reyes-Vargas E;Rudd B;Rockwood AL;Van Kaer L;Sato N;Delgado JC;Shastri N
Effective CD8+ T cell responses depend upon presentation of a stable peptide repertoire by MHC I molecules on the cell surface. The overall quality of pMHC I is determined by poorly understood mechanisms that generate and load peptides with appropriate consensus motifs onto MHC I. Here we show that both tapasin, a key component of the peptide loading complex, and ERAAP, the ER aminopeptidase associated with antigen processing, are quintessential editors of distinct structural features of the peptide repertoire. We carried out reciprocal immunization of wild-type mice with cells from tapasin- or ERAAP-deficient mice. Specificity analysis of T cell responses showed that absence of tapasin or ERAAP independently altered the peptide repertoire by causing loss as well as gain of new pMHC I. Changes in amino acid sequences of MHC bound-peptides revealed that ERAAP and tapasin respectively defined the characteristic amino and carboxy termini of canonical MHC I peptides. Thus, the optimal pMHC I repertoire is produced by two distinct peptide editing steps in the ER.
登录
查看更多内容
影响因子:
32.4
作者:
Dong, Gang;Wearsch, Pamela A.;Peaper, David R.;Cresswell, Peter;Reinisch, Karin M.
通讯作者:
Reinisch, Karin M.
影响因子:
30.5
作者:
通讯作者:
--
影响因子:
30.5
作者:
Nagarajan, Niranjana A.;Gonzalez, Federico;Shastri, Nilabh
通讯作者:
Shastri, Nilabh
影响因子:
11.4
作者:
Chen, Mingnan;Bouvier, Marlene
通讯作者:
Bouvier, Marlene
影响因子:
--
作者:
Jiang, Qian;Pan, Hong-ya;Zhang, Zhi-yuan
通讯作者:
Zhang, Zhi-yuan