Killer cell inhibitory receptor recognition of human leukocyte antigen (HLA) class I blocks formation of a pp36/PLC-gamma signaling complex in human natural killer (NK) cells.

Killer cell inhibitory receptor recognition of human leukocyte antigen (HLA) class I blocks formation of a pp36/PLC-gamma signaling complex in human natural killer (NK) cells.
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DOI:
10.1084/jem.184.6.2243
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发表时间:
1996-12-01
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Parham P
Parham P
中科院分区:
其他
文献类型:
--
作者:
Valiante NM;Phillips JH;Lanier LL;Parham P

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人类自然杀伤 (NK) 细胞的杀伤细胞抑制受体 (KIR) 识别人类白细胞抗原 I 类分子,并通过与蛋白酪氨酸磷酸酶 (PTP) 相互作用来抑制 NK 细胞的细胞毒性。在这里,我们报告,KIR 对 I 类配体的识别通过阻断 NK 细胞中接头蛋白 (pp36) 与磷脂酶 C-γ 的结合来抑制远端信号传导事件,并最终抑制 NK 细胞的细胞毒性。此外,我们证明 pp36 可以作为 KIR 相关 PTP、PTP-1C(也称为 SHP-1)的体外底物,并且对 I 类的识别部分破坏 NK 细胞蛋白的酪氨酸磷酸化,为 KIR 诱导的磷酸酶活性提供了证据。
The killer cell inhibitory receptors (KIR) of human natural killer (NK) cells recognize human leukocyte antigen class I molecules and inhibit NK cell cytotoxicity through their interaction with protein tyrosine phosphatases (PTP). Here, we report that KIR recognition of class I ligands inhibits distal signaling events and ultimately NK cell cytotoxicity by blocking the association of an adaptor protein (pp36) with phospholipase C-γ in NK cells. In addition, we demonstrate that pp36 can serve as a substrate in vitro for the KIR-associated PTP, PTP-1C (also called SHP-1), and that recognition of class I partially disrupts tyrosine phosphorylation of NK cell proteins, providing evidence for KIR-induced phosphatase activity.
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发表时间: 1995-01-27
期刊: SCIENCE
影响因子: 56.9
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