期刊
MOLECULAR AND CELLULAR BIOLOGY
卷 22, 期 8, 页码 2524-2535出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/MCB.22.8.2524-2535.2002
关键词
-
资金
- NHLBI NIH HHS [HL07065] Funding Source: Medline
- NIAID NIH HHS [AI42787] Funding Source: Medline
- NIGMS NIH HHS [R01 GM052736, GM56187, GM52736] Funding Source: Medline
Following B-cell antigen receptor (BCR) ligation, the cytoplasmic domains of immunoglobulin alpha (Igalpha) and Igbeta recruit Syk to initiate signaling cascades. The coupling of Syk to several distal substrates requires linker protein BLNK. However, the mechanism by which BLNK is recruited to the BCR is unknown. Using chimeric receptors with wild-type and mutant Igalpha cytoplasmic tails we show that the non-immunoreceptor tyrosine-based activation motif (ITAM) tyrosines, Y176 and Y204, are required to activate BLNK-dependent pathways. Subsequent analysis demonstrated that BLNK bound directly to phospho-Y204 and that fusing BLNK to mutated Igalpha reconstituted downstream signaling events. Moreover, ligation of the endogenous BCR induced Y204 phosphorylation and BLNK recruitment. These data demonstrate that the non-ITAM tyrosines of Iga couple Syk activation to BLNK-dependent pathways.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据