7QTQ image
Entry Detail
PDB ID:
7QTQ
EMDB ID:
EMD-14145
Keywords:
HORMONE
Title:
Structure of Native, iodinated bovine thyroglobulin solved on strepavidin affinity grids.
Biological Source:
Source Organism:
Bos taurus
PDB Version:
Deposition Date:
2022-01-15
Release Date:
2022-05-04
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
7QTQ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Thyroglobulin
Chain IDs:A, B
Chain Length:2769
Number of Molecules:2
Biological Source:Bos taurus
UniProt ID:P01267 Pfam ID:PF00086, PF07699, PF00135
Ligand Molecules
NAG
Primary Citation
Formation of thyroid hormone revealed by a cryo-EM structure of native bovine thyroglobulin.
Nat Commun 13 2380 2380 (2022)
PMID: 35501346 DOI: 10.1038/s41467-022-30082-4

Abstact

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 ~3.3-Å 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.

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Primary Citation of related structures
7QTQ