WSB-1 is a SOCS-box-containing WD-40 protein of unknown function that is induced by Hedgehog signalling in embryonic structures during chicken development. Here we show that WSB-1 is part of an E3 ubiquitin ligase for the thyroid-hormone-activating type 2 iodothyronine deiodinase (D2). The WD-40 propeller of WSB-1 recognizes an 18-amino-acid loop in D2 that confers metabolic instability, whereas the SOCS-box domain mediates its interaction with a ubiquitinating catalytic core complex, modelled as Elongin BC-Cul5-Rbx1 (ECS(WSB-1)). In the developing tibial growth plate, Hedgehog-stimulated D2 ubiquitination via ECS(WSB-1) induces parathyroid hormone-related peptide (PTHrP), thereby regulating chondrocyte differentiation. Thus, ECS(WSB-1) mediates a mechanism by which 'systemic' thyroid hormone can effect local control of the Hedgehog-PTHrP negative feedback loop and thus skeletogenesis.
The Hedgehog-inducible ubiquitin ligase subunit WSB-1 modulates thyroid hormone activation and PTHrP secretion in the developing growth plate / Dentice, M., Bandyopadhyay, A., Gereben, B., Callebaut, I., Christoffolete, M.A., Kim, B.W., Nissim, S., Mornon, J.-P., Zavacki, A.M., Zeold, A., Capelo, L.P., Curcio-Morelli, C., Ribeiro, R., Harney, J.W., Tabin, C.J., Bianco, A.C.. - In: NATURE CELL BIOLOGY. - ISSN 1465-7392. - 7:7(2005), pp. 698-705. [10.1038/ncb1272]
The Hedgehog-inducible ubiquitin ligase subunit WSB-1 modulates thyroid hormone activation and PTHrP secretion in the developing growth plate
Dentice M.;
2005
Abstract
WSB-1 is a SOCS-box-containing WD-40 protein of unknown function that is induced by Hedgehog signalling in embryonic structures during chicken development. Here we show that WSB-1 is part of an E3 ubiquitin ligase for the thyroid-hormone-activating type 2 iodothyronine deiodinase (D2). The WD-40 propeller of WSB-1 recognizes an 18-amino-acid loop in D2 that confers metabolic instability, whereas the SOCS-box domain mediates its interaction with a ubiquitinating catalytic core complex, modelled as Elongin BC-Cul5-Rbx1 (ECS(WSB-1)). In the developing tibial growth plate, Hedgehog-stimulated D2 ubiquitination via ECS(WSB-1) induces parathyroid hormone-related peptide (PTHrP), thereby regulating chondrocyte differentiation. Thus, ECS(WSB-1) mediates a mechanism by which 'systemic' thyroid hormone can effect local control of the Hedgehog-PTHrP negative feedback loop and thus skeletogenesis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
