RECONSTITUTION OF T-CELL RECEPTOR ZETA-MEDIATED CALCIUM MOBILIZATION IN NONLYMPHOID CELLS

被引：80
作者：
HALL, CG
SANCHO, J
TERHORST, C
机构：
[1] Division of Immunology, Beth Israel Hospital, Harvard Medical School, Boston
来源：
SCIENCE | 1993年 / 261卷 / 5123期
关键词：
D O I：
10.1126/science.8346442
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
T cell antigen receptor (TCR) activation involves interactions between receptor subunits and nonreceptor protein tyrosine kinases (PTKs). Early steps in signaling through the zeta chain of the TCR were examined in transfected COS-1 cells. Coexpression of the PTK p59fynT, but not p56lck, with zeta or with a homodimeric TCRbeta-zeta fusion protein produced tyrosine phosphorylation of both zeta and phospholipase C (PLC)-gamma1, as well as calcium ion mobilization in response to receptor cross-linking. CD45 coexpression enhanced these effects. No requirement for the PTKZAP-70 was observed. Thus, p59fynT may link zeta directly to the PLC-gamma1 activation pathway.
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页码：915 / 918
页数：4
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