Type II natural killer T cells use features of both innate-like and conventional T cells to recognize sulfatide self antigens.

Type II natural killer T cells use features of both innate-like and conventional T cells to recognize sulfatide self antigens.
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DOI:
10.1038/ni.2371
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发表时间:
2012-09
期刊:
影响因子:
30.5
通讯作者:
Zajonc, Dirk M.
Zajonc, Dirk M.
中科院分区:
医学1区
文献类型:
--
作者:
Girardi, Enrico;Maricic, Igor;Wang, Jing;Mac, Thien-Thi;Iyer, Pooja;Kumar, Vipin;Zajonc, Dirk M.

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主要组织相容性复合体I类(MHC I)同源CD1d所呈现的糖脂被半不变(I型或iNKT)或相对可变(II型)T细胞受体(TCR)库特征的自然杀伤T (NKT)细胞识别。这里我们描述了II型NKT TCR与cd1 -溶硫脂(LSF)络合的第一个结构。TCR α链和β链都以对角足迹与CD1d分子接触,这是典型的MHC-TCR相互作用,而抗原仅通过单个TCR链识别,类似于iNKT TCR。因此,II型NKT细胞识别cd1 -硫脂复合物具有独特的识别机制,具有iNKT细胞和常规肽反应性T细胞的特征。
Glycolipids presented by the major histocompatibility complex class I (MHC I) homolog CD1d are recognized by natural killer T (NKT) cells characterized by either a semi-invariant (type I or iNKT) or a relatively variable (type II) T cell receptor (TCR) repertoire. Here we describe the first structure of a type II NKT TCR complexed with CD1d-lysosulfatide (LSF). Both TCR α and β chains contacted the CD1d molecule with a diagonal footprint, typical of MHC-TCR interactions, while the antigen was recognized exclusively with a single TCR chain, similar to the iNKT TCR. Type II NKT cells, therefore, recognize CD1d-sulfatide complexes with a distinct recognition mechanism characterized by features of both iNKT cells as well as conventional peptide-reactive T cells.
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