A comparative analysis of paxillin and Hic-5 proximity interactomes.

Autor: Brock K; Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA., Alpha KM; Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA., Brennan G; Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA., De Jong EP; Proteomics Core Facility, State University of New York Upstate Medical University, Syracuse, New York, USA., Luke E; Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA., Turner CE; Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA.
Jazyk: angličtina
Zdroj: Cytoskeleton (Hoboken, N.J.) [Cytoskeleton (Hoboken)] 2024 May 27. Date of Electronic Publication: 2024 May 27.
DOI: 10.1002/cm.21878
Abstrakt: Focal adhesions serve as structural and signaling hubs, facilitating bidirectional communication at the cell-extracellular matrix interface. Paxillin and the related Hic-5 (TGFβ1i1) are adaptor/scaffold proteins that recruit numerous structural and regulatory proteins to focal adhesions, where they perform both overlapping and discrete functions. In this study, paxillin and Hic-5 were expressed in U2OS osteosarcoma cells as biotin ligase (BioID2) fusion proteins and used as bait proteins for proximity-dependent biotinylation in order to directly compare their respective interactomes. The fusion proteins localized to both focal adhesions and the centrosome, resulting in biotinylation of components of each of these structures. Biotinylated proteins were purified and analyzed by mass spectrometry. The list of proximity interactors for paxillin and Hic-5 comprised numerous shared core focal adhesion proteins that likely contribute to their similar functions in cell adhesion and migration, as well as proteins unique to paxillin and Hic-5 that have been previously localized to focal adhesions, the centrosome, or the nucleus. Western blotting confirmed biotinylation and enrichment of FAK and vinculin, known interactors of Hic-5 and paxillin, as well as several potentially unique proximity interactors of Hic-5 and paxillin, including septin 7 and ponsin, respectively. Further investigation into the functional relationship between the unique interactors and Hic-5 or paxillin may yield novel insights into their distinct roles in cell migration.
(© 2024 Wiley Periodicals LLC.)
Databáze: MEDLINE
Externí odkaz: