Hematopoietic Cell Phosphatase Is Recruited to CD22 following B Cell Antigen Receptor Ligation (*)
Hematopoietic Cell Phosphatase Is Recruited to CD22 following B Cell Antigen Receptor Ligation (*)
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B 细胞抗原受体连接后,造血细胞磷酸酶被招募至 CD22 (*)
DOI:
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发表时间:
1995
影响因子:
4.8
通讯作者:
R. V. van Lier
中科院分区:
文献类型:
--
作者:
A. Lankester;G. V. van Schijndel;R. V. van Lier
Hematopoietic cell phosphatase is a nonreceptor protein tyrosine phosphatase that is preferentially expressed in hematopoietic cell lineages. Motheaten mice, which are devoid of (functional) hematopoietic cell phosphatase, have severe disturbances in the regulation of B cell activation and differentiation. Because signals transduced via the B cell antigen receptor are known to guide these processes, we decided to analyze molecular interactions between the hematopoietic cell phosphatase and the B cell antigen receptor. Ligation of the B cell antigen receptor induces moderate tyrosine phosphorylation of hematopoietic cell phosphatase and the formation of a multimolecular complex containing additional 68-70- and 135-kDa phosphoproteins. In resting B cells most of the hematopoietic cell phosphatase proteins reside in the cytosolic compartment, whereas after B cell antigen receptor cross-linking, a small fraction translocates toward the membrane where it specifically binds to the 135-kDa phosphoprotein. This 135-kDa glycoprotein was identified as CD22, a transmembrane associate of the B cell antigen receptor complex. Together these findings provide the first direct evidence that this cytoplasmic tyrosine phosphatase is involved in antigen receptor-mediated B cell activation, suggesting that in vivo B cell antigen receptor constituents or associated molecules may serve as substrate for its catalytic activity.
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DOI:
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发表时间:
1986
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Antin,JH;Emerson,SG;Martin,P;Gadol,N;Ault,KA
通讯作者:
Ault,KA
DOI:
10.1073/pnas.89.23.11239
发表时间:
1992-12-01
影响因子:
11.1
作者:
FREEMAN, RM;PLUTZKY, J;NEEL, BG
通讯作者:
NEEL, BG
影响因子:
20.3
作者:
Yi,T;Zhang,J;Miura,O;Ihle,JN
通讯作者:
Ihle,JN
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hutchcroft,JE;Harrison,ML;Geahlen,RL
通讯作者:
Geahlen,RL
影响因子:
56.9
作者:
SCHULTE, RJ;CAMPBELL, MA;SEFTON, BM
通讯作者:
SEFTON, BM