Leucine 341 has been predicted from crystal structure as an important residue for thyroid hormone receptor beta (TRβ) function, but this has never been confirmed in functional studies. Here, a novel p.L341V mutation as a cause of resistance to TRβ is described, suggesting an important role for L341 in TRβ function. In silico and in vitro studies confirmed that substituting L341 with valine and other non-polar amino acids impairs sensitivity of TRβ for triiodothyronine to various degrees, depending on their side-chain size and orientation.

Additional Metadata
Keywords receptor mutation, resistance to thyroid hormone beta, thyroid hormone action, thyroid hormone receptor beta
Persistent URL dx.doi.org/10.1089/thy.2018.0146, hdl.handle.net/1765/113460
Journal Thyroid
Citation
Wejaphikul, K, Groeneweg, S, Dejkhamron, P. (Prapai), Unachak, K. (Kevalee), Visser, W.J, Chatterjee, K, … Peeters, R.P. (2018). Role of Leucine 341 in Thyroid Hormone Receptor Beta Revealed by a Novel Mutation Causing Thyroid Hormone Resistance. Thyroid, 28(12), 1723–1726. doi:10.1089/thy.2018.0146