这个基因编码的蛋白质是三碘甲状腺原氨酸的核激素受体。它是甲状腺激素的几种受体之一，已被证明介导甲状腺激素的生物活性。小鼠的基因敲除研究表明，不同的受体虽然有一定程度的冗余，但可能介导甲状腺激素的不同功能。已知该基因突变是导致广泛性甲状腺激素抵抗（gthr）的原因，这是一种以甲状腺肿和高水平循环甲状腺激素（t3-t4）为特征的综合征，伴有正常或稍高的促甲状腺激素（tsh）。已观察到该基因中编码相同蛋白质的几个选择性剪接转录变体。[由RefSeq提供，2008年7月]
The protein encoded by this gene is a nuclear hormone receptor for triiodothyronine. It is one of the several receptors for thyroid hormone, and has been shown to mediate the biological activities of thyroid hormone. Knockout studies in mice suggest that the different receptors, while having certain extent of redundancy, may mediate different functions of thyroid hormone. Mutations in this gene are known to be a cause of generalized thyroid hormone resistance (GTHR), a syndrome characterized by goiter and high levels of circulating thyroid hormone (T3-T4), with normal or slightly elevated thyroid stimulating hormone (TSH). Several alternatively spliced transcript variants encoding the same protein have been observed for this gene. [provided by RefSeq, Jul 2008]