Tyrosine-protein kinase-interacting protein - P22575 (TIP_SHV2C)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P22575: 1
Plays a critical role in virus induced T-cell transformation. Binds to T-cell-specific tyrosine kinase LCK SH2 and SH3 domains, thereby activating its kinase activity. Once phosphorylated by host LCK, forms a complex with at least STAT 1 and 3, resulting on the phosphorylation of STAT3 and presumably STAT1, and their migration into the nucleus to induce transcription of target genes. Stimulates host ILF3/NF-AT-90 activity. Association with host NXF1/TAP transduces the signal up-regulating surface expression of adhesion molecules as well as activating NF-kappa-B activity. Acts synergistically with StpC to stimulate NF-kappa-B activity and interleukin-2 gene expression. Activation of NF-kappa-B protects lymphocytes from apoptosis, thereby facilitating viral induced cell transformation. May cause down-regulation of host LCK and cell apoptosis when stably overexpressed ex vivo. Interaction with WDR48 induce degradation of T-cell receptor in a lysosome-dependent fashion, when both proteins are overexpressed. The biological effect of this interaction remains controversial since no T-cell receptor degradation is observed in infected cells. UniProt
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Subunit Structure
Binds host LCK, human WDR48 and human NXF1/TAP. Forms a complex with activated LCK and STAT1 and STAT3. UniProt
The SH3B/LBD1 (SH3-binding) region binds LCK SH3 domain and CSKH (C-terminal Src-related kinase homology) region binds the kinase domains of LCK. Both motif are required to activate LCK. UniProt
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