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- T Kurosaki
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- M Takata
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- Y Yamanashi
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- T Inazu
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- T Taniguchi
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- T Yamamoto
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
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- H Yamamura
- Department of Cardiovascular Molecular Biology, Lederle Laboratories, Pearl River, New York 10965.
抄録
<jats:p>Signaling through the B cell antigen receptor (BCR) results in rapid increases in tyrosine phosphorylation on a number of proteins. The BCR associates with two classes of tyrosine kinase: Src-family kinase (Src-protein-tyrosine kinase [PTK]; Lyn, Fyn, Blk, or Lck) and Syk kinase. We have investigated the interaction between the Src-PTK and the Syk kinase in the BCR signaling. In contrast to wild-type B cells, BCR-mediated tyrosine phosphorylation of Syk and activation of its in vitro kinase activity were profoundly reduced in lyn-negative cells. The requirement of the Src-PTK to induce tyrosine phosphorylation and activation of Syk was also demonstrated by cotransfection of syk and src-PTK cDNAs into COS cells. These results suggest that the Src-PTK associated with BCR phosphorylates the tyrosine residue(s) of Syk upon receptor stimulation, enhancing the activity of Syk.</jats:p>
収録刊行物
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- The Journal of experimental medicine
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The Journal of experimental medicine 179 (5), 1725-1729, 1994-05-01
Rockefeller University Press
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詳細情報 詳細情報について
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- CRID
- 1364233268498473344
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- NII論文ID
- 30017431860
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- ISSN
- 15409538
- 00221007
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- データソース種別
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