New interactions of invadopodia scaffold protein TKS5 with proteins that take part in actin cytoskeleton reorganization, endo-/exocytosis and membrane remodeling
Abstract
Aim. TKS5 is a key scaffold protein of invadopodia. In its absence, the cells completely lose the ability to form invadopodia. This fact makes TKS5 a potential target for cancer cure and one of the central proteins in the
investigation of cancer cell invasion. Additionally, the question remains about the function of TKS5 in normal cells. Therefore, in order to extend knowledge about TKS5 role in healthy and invasive cells, we tested the TKS5 interaction with the proteins involved in signal transduction: PLCγ1, SRC, CRK, CSK; the proteins involved in plasma membrane remodeling: AMPH1, BIN1, CIN85, ITSN1, ITSN2; the protein involved in the actin cytoskeleton rearrangement: CTTN. Methods. We used the GST Pull-down assay to identify the protein-protein interaction. Results. We revealed that TKS5 SH3 domains interact with CIN85. There were identified interactions between the TKS5 isoform with exon 7 and without exon 9a and SH3 domains of CTTN, ITSN1, ITSN2, AMPH1 and BIN1. Conclusions. TKS5 interacts with CIN85, CTTN, ITSN1, ITSN2, AMPH1 and BIN1, which take part in membrane remodeling, endo-/exocytosis and actin cytoskeleton rearrangement.
Keywords: TKS5, scaffold proteins, actin cytoskeleton, plasma membrane.
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