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 Vol 9: Vimentin Mediates Uptake of C3 Exoenzyme.

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This article is from PLoS ONE, volume 9.AbstractClostridium botulinum C3 exoenzyme C3 selectively inactivates RhoA-B-C GTPases by ADP-ribosylation. Based on this substrate specificity C3 is a well-established tool in cell biology. C3 is taken up by eukaryotic cells although lacking an uptake and translocation domain. Based on different approaches vimentin was identified as membranous C3-interaction partner by mass spectrometry. Vimentin in fact was partly localized at the outer surface of hippocampal HT22 cells and J744A.1 macrophages. Domain analysis identified the rod domain as binding partner of C3. Vimentin was also involved in uptake of C3 as shown by knock down of vimentin in HT22 and J774A.1 cells. The involvement of vimentin in uptake of C3 was further supported by the findings that the vimentin disruptor acrylamide blocked uptake of C3. Vimentin is not only a major organizing element of the intermediate filament network but is also involved in both binding and uptake of C3 exoenzyme.

Autor: Rohrbeck, Astrid; Schroder, Anke; Hagemann, Sandra; Pich, Andreas; Holtje, Markus; Ahnert-Hilger, Gudrun; Just, Ingo

Fuente: https://archive.org/

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