In situ proximity ligation assays indicate that hemochromatosis proteins Hfe and Transferrin Receptor 2 (Tfr2) do not interact

Rishi, G., Crampton, E.M., Wallace, D.F., & Subramaniam, V.N. (2013) In situ proximity ligation assays indicate that hemochromatosis proteins Hfe and Transferrin Receptor 2 (Tfr2) do not interact. PLoS ONE, 8(10), Article Number- e77267.

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Abstract

The hemochromatosis associated proteins HFE and Transferrin Receptor 2 (TFR2) have been shown to be important for the proper regulation of hepcidin. A number of in vitro studies using transient overexpression systems have suggested that an interaction between HFE and TFR2 is required for the regulation of hepcidin. This model of iron sensing which centers upon the requirement for an interaction between HFE and TFR2 has recently been questioned with in vivo studies in mice from our laboratory and others which suggest that Hfe and Tfr2 can regulate hepcidin independently of each other. To re-examine the postulated interaction between Hfe and Tfr2 we developed a novel expression system in which both proteins are stably co-expressed and used the proximity ligation assay to examine the interactions between Hfe, Tfr1 and Tfr2 at a cellular level. We were able to detect the previously described interaction between Hfe and Tfr1, and heterodimers between Tfr1 and Tfr2; however no interaction between Hfe and Tfr2 was observed in our system. The results from this study indicate that Hfe and Tfr2 do not interact with each other when they are stably expressed at similar levels. Furthermore, these results support in vivo studies which suggest that Hfe and Tfr2 can independently regulate hepcidin.

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ID Code: 99834
Item Type: Journal Article
Refereed: Yes
DOI: 10.1371/journal.pone.0077267
Divisions: Current > Schools > School of Biomedical Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Copyright Owner: Copyright 2013 The Author(s)
Copyright Statement: his is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Deposited On: 14 Oct 2016 00:00
Last Modified: 17 Oct 2016 02:34

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