
淋巴细胞的信号传导(上) - 知乎 - 知乎专栏
在t细胞中,首先磷酸化cd3 itam的激酶是lck。 Lck的N端有一个SH4结构域,常被脂肪酸化修饰而能够固定在细胞膜内侧,另外在N端也有两个Cys残基,通过结合锌离子和CD4或CD8的胞内 …
细胞免疫研究的核心通路——T cell receptor signaling pathway( …
2022年7月11日 · 酪氨酸激酶LCK是TCR通路的一个关键调节结点,LCK的构象以及细胞定位变化将影响TCR信号传导。 LCK的活性调节受其两个酪氨酸残基磷酸化的影响:位于催化结构域 …
LCK-phosphorylated human killer cell-inhibitory receptors ... - PNAS
1998年9月29日 · We confirm here that after phosphorylation by LCK, SHP-2 is recruited to all types of tested KIR CYT that contain complete ITIM sequences. Also, we show that for one …
ITAMs versus ITIMs: striking a balance during cell regulation
Upon agonist binding there is receptor clustering (not shown), and CD4/8-associated Lck (and CD3ε-associated Fyn, not shown) can then phosphorylate the four tyrosines within the …
Distinct Roles Of PD-1 Itsm and ITIM In Regulating Interactions …
2013年11月15日 · Although phosphorylation-dependent interactions of PD-1 with SHP-2, ZAP-70 and Lck involve Y248 in the ITSM, yet unidentified interactions of Y223 in the ITIM are …
T细胞中的免疫检查点受体信号通路 - MedSci
2022年9月6日 · lair-1的细胞内区域包含两个itim(y251和y281),它们在lair-1激活时均被磷酸化,并且是shp-1和shp-2募集所必需的。lair-1与胶原的结合抑制了tcr触发的lck、lyn和典型t细胞 …
PD-1 通过隔离 SHP-2 磷酸酶和促进 Csk 介导的 Lck 抑制性磷酸化 …
PD-1 的细胞质尾部包含两个结构基序,一个基于免疫受体酪氨酸的抑制基序 (ITIM) 和一个基于免疫受体酪氨酸的开关基序 (ITSM)。 据报道,SHP-2 酪氨酸磷酸酶与 ITSM 组成型相互作用, …
Differential contribution of the immunoreceptor tyrosine-based ...
Leukocyte-associated Ig-like receptor (LAIR)-1 is an inhibitory receptor expressed on most human leukocytes. It contains two immunoreceptor tyrosine-based inhibitory motifs (ITIM) in its …
Inhibitory receptors, ITIM sequences and phosphatases
1997年6月1日 · A diverse group of inhibitory receptors, including FcγRII, killer cell inhibitory receptors, and B22, shares an immunoreceptor tyrosine-based inhibition motif (ITIM). Recent …
Inhibitory leukocyte immunoglobulin-like receptors: Immune checkpoint ...
Inhibitory leukocyte immunoglobulin-like receptors (LILRBs 1-5) transduce signals via intracellular immunoreceptor tyrosine-based inhibitory motifs (ITIMs) that recruit protein tyrosine …