Thyroid hormones are essential regulators of metabolism, development, and growth. They are formed from pairs of iodinated tyrosine residues within the precursor thyroglobulin (TG), a 660-kDa homodimer of the thyroid gland, by an oxidative coupling reaction. Tyrosine pairs that give rise to thyroid hormones have been assigned within the structure of human TG, but the process of hormone formation is poorly understood. Here we report a \textasciitilde3.3-\AA cryo-EM structure of native bovine TG with nascent thyroid hormone formed at one of the predicted hormonogenic sites. Local structural rearrangements provide insight into mechanisms underlying thyroid hormone formation and stabilization.
JoeLoparoOur first paper investigating the mechanism of the bacterial cell wall machinery. In this collaborative work with the Kruse and Bernhardt labs, we show how conformational dynamics of RodA-PBP2 coordinate its enzymatic activities. t.co/SnwZ8p4kF0