Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression

Joseph Fargnoli, Anne L. Burkhardt, Maureen Laverty, Stephanie A. Kut, Nicolai S C Van Oers, Arthur Weiss, Joseph B. Bolen

Research output: Contribution to journalArticle

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Abstract

The human leukemic Jurkat cell line is commonly used as a model cellular system to study T lymphocyte signal transduction. Various clonal derivatives of Jurkat T cells exist which display different characteristics with regard to responses to external stimuli. Among these, the E6-1 clone of Jurkat T cells has been used as a parental line from which numerous important somatic mutant clones have been generated. During the course of experiments examining signals initiated by the T cell antigen receptor in an E6-1-derived Jurkat cell clone J.CaM1, we observed that the 72-kilodalton Syk protein tyrosine kinase previously found in other Jurkat cells was not detected. Upon further analysis it was determined that Syk transcripts from the J.CaM1 cells as well as the parental E6-1 cells contain a single guanine nucleotide insertion at position 92. This nucleotide insertion results in a shift in the Syk open reading frame leading to alternate codon usage as well as the generation of a termination codon at position 109. Thus, Syk transcripts in E6-1 cells and E6-1-derived clones are predicted to be capable of encoding only the first 33 amino acids of the 630-amino acid wild type Syk. These findings are incompatible with a recently proposed model of T cell antigen receptor signal transduction based, in part, on experiments conducted using E6-1-derived cells, suggesting that Syk might play a role upstream of Lck and Zap70.

Original languageEnglish (US)
Pages (from-to)26533-26537
Number of pages5
JournalJournal of Biological Chemistry
Volume270
Issue number44
StatePublished - Nov 3 1995

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Jurkat Cells
T-cells
Signal transduction
Clone Cells
T-Cell Antigen Receptor
Mutation
Clone cells
Amino Acids
T-Lymphocytes
Guanine Nucleotides
Signal Transduction
Protein-Tyrosine Kinases
Nucleotides
Experiments
Cells
Terminator Codon
Derivatives
Codon
Open Reading Frames
Cell Line

ASJC Scopus subject areas

  • Biochemistry

Cite this

Fargnoli, J., Burkhardt, A. L., Laverty, M., Kut, S. A., Van Oers, N. S. C., Weiss, A., & Bolen, J. B. (1995). Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression. Journal of Biological Chemistry, 270(44), 26533-26537.

Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression. / Fargnoli, Joseph; Burkhardt, Anne L.; Laverty, Maureen; Kut, Stephanie A.; Van Oers, Nicolai S C; Weiss, Arthur; Bolen, Joseph B.

In: Journal of Biological Chemistry, Vol. 270, No. 44, 03.11.1995, p. 26533-26537.

Research output: Contribution to journalArticle

Fargnoli, J, Burkhardt, AL, Laverty, M, Kut, SA, Van Oers, NSC, Weiss, A & Bolen, JB 1995, 'Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression', Journal of Biological Chemistry, vol. 270, no. 44, pp. 26533-26537.
Fargnoli J, Burkhardt AL, Laverty M, Kut SA, Van Oers NSC, Weiss A et al. Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression. Journal of Biological Chemistry. 1995 Nov 3;270(44):26533-26537.
Fargnoli, Joseph ; Burkhardt, Anne L. ; Laverty, Maureen ; Kut, Stephanie A. ; Van Oers, Nicolai S C ; Weiss, Arthur ; Bolen, Joseph B. / Syk mutation in Jurkat E6-derived clones results in lack of p72syk expression. In: Journal of Biological Chemistry. 1995 ; Vol. 270, No. 44. pp. 26533-26537.
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