TSGA10 prevents nuclear localization of the hypoxia-inducible factor (HIF)-1α

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The hypoxia-inducible factor (HIF)-1 is a transcriptional regulator of genes involved in oxygen homeostasis. We previously described testis-specific isoforms of HIF-1α (mHIF-1αI.1 and hHIF-1αTe). Using mHIF-1α exon I.1 knock-out mice we confirmed the specific expression of mHIF-1αI.1 in the sperm tail. A protein-protein interaction between HIF-1α and the testis specific gene antigen 10 (TSGA10) was identified by yeast two-hybrid screening. TSGA10 is expressed in testis but also in other organs and malignant tissues. Immunofluorescence analysis indicated that the C-terminal part of TSGA10 accumulates in the midpiece of spermatozoa, where it co-localizes with HIF-1α. HIF-1α nuclear localization and HIF-1 transcriptional activity were significantly affected by overexpressed TSGA10. © 2006 Federation of European Biochemical Societies.




Hägele, S., Behnam, B., Borter, E., Wolfe, J., Paasch, U., Lukashev, D., … Katschinski, D. M. (2006). TSGA10 prevents nuclear localization of the hypoxia-inducible factor (HIF)-1α. FEBS Letters, 580(15), 3731–3738. https://doi.org/10.1016/j.febslet.2006.05.058

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