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TULA-Family Regulators of Platelet Activation

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出版社

MDPI
DOI: 10.3390/ijms232314910

关键词

platelet; signaling; phosphorylation; Syk; ITAM; hemITAM; TULA-2

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  1. NHLBI/NIH
  2. [HL155694]

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The members of the UBASH3/TULA/STS-protein family play critical regulatory roles in cellular processes. TULA-2 serves as a negative regulator of platelet signaling, downregulating the biological responses of platelets to agonists.
The two members of the UBASH3/TULA/STS-protein family have been shown to critically regulate cellular processes in multiple biological systems. The regulatory function of TULA-2 (also known as UBASH3B or STS-1) in platelets is one of the best examples of the involvement of UBASH3/TULA/STS proteins in cellular regulation. TULA-2 negatively regulates platelet signaling mediated by ITAM- and hemITAM-containing membrane receptors that are dependent on the protein tyrosine kinase Syk, which currently represents the best-known dephosphorylation target of TULA-2. The biological responses of platelets to collagen and other physiological agonists are significantly downregulated as a result. The protein structure, enzymatic activity and regulatory functions of UBASH3/TULA/STS proteins in the context of platelet responses and their regulation are discussed in this review.

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