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- W2970299039 abstract "The human HtrA4 protein, belonging to the HtrA family of proteases/chaperones, participates in oncogenesis and placentation, and plays a role in preeclampsia. As the knowledge concerning the biochemical features of this protein and its role at the molecular level is limited, in this work we characterized the HtrA4 molecule and searched for its cellular function. We found that recombinant HtrA4 composed of the protease and PDZ domains is a trimeric protein of intermediate thermal stability whose activity is considerably lower compared to other human HtrA proteases. By pull-down combined with mass spectrometry we identified a large array of potential HtrA4 partners. Using other experimental approaches, including immunoprecipitation, enzyme-linked immunosorbent assay and fluorescence microscopy we confirmed that HtrA4 formed complexes in vitro and in cellulo with proteins such as XIAP (inhibitor of apoptosis protein), caspases 7 and 9, β-tubulin, actin, TCP1α and S100A6. The recombinant HtrA4 degraded XIAP, the caspases, β-tubulin and actin but not TCP1α or S100A6. Together, these results suggest that HtrA4 may influence various cellular functions, including apoptosis. Furthermore, the panel of potential HtrA4 partners may serve as a basis for future studies of HtrA4 function." @default.
- W2970299039 created "2019-09-05" @default.
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- W2970299039 date "2019-10-01" @default.
- W2970299039 modified "2023-10-02" @default.
- W2970299039 title "Cellular substrates and pro-apoptotic function of the human HtrA4 protease" @default.
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- W2970299039 doi "https://doi.org/10.1016/j.jprot.2019.103505" @default.
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