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SYK

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Encyclopedia of Signaling Molecules
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Synonyms

p72Syk; PTK72; Spleen tyrosine kinase; Syk(L); Syk(S) SYK; SykB

Historical Background

Catalytic activity corresponding to the SYK kinase was first detected in extracts from bovine thymus based on the phosphorylation on tyrosine of a synthetic peptide substrate. Purification of this activity by conventional column chromatographic approaches led to the isolation of an enzyme with a molecular mass of 40 kDa that was originally referred to as p40 (Zioncheck et al. 1986). Shortly thereafter, the same catalytic fragment was identified and purified from porcine spleen and given the name CPTK40 (Kobayashi et al. 1990). The fact that these two kinases were actually catalytic fragments was recognized when antibodies generated against p40 revealed a larger precursor of 72 kDa, the proteolytic cleavage of which yielded the activated 40 kDa fragment (Zioncheck et al. 1988). The full-length protein was originally referred to as PTK72. Similarly, the screening of a porcine cDNA library with...

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Correspondence to Robert L. Geahlen .

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Geahlen, R.L. (2018). SYK. In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, Cham. https://doi.org/10.1007/978-3-319-67199-4_101869

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