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Congenital hypothyroidism (CH) is a relatively frequent and potentially severe disease. It is classically subdivided into: 1) thyroid dysgenesis (TD), a defect in the organogenesis of the gland leading to hypoplastic, ectopic, or absent thyroid gland; or 2) thyroid dyshormonogenesis, a defect in one
Tyrosylprotein sulfotransferase 2 (TPST2) is one of the enzymes responsible for tyrosine O-sulfation and catalyzes the sulfation of the specific tyrosine residue of thyroid stimulating hormone receptor (TSHR). Since this modification is indispensable for the activation of TSH signaling, a
The growth-retarded (grt) mouse has an autosomal recessive, fetal-onset, severe thyroid hypoplasia related to TSH hyporesponsiveness. Through genetic mapping and complementation experiments, we show that grt is a missense mutation of a highly conserved region of the tyrosylprotein sulfotransferase 2