Cited by 342Thyroid Disorders and TreatmentsSelenium in Biological SystemsOrganoselenium and organotellurium chemistry

The Deiodinase Family of Selenoproteins

GERMAIN, DONALD L. ST., GALTON, VALERIE ANNE·1997·Thyroid

Abstract

The realization some forty years ago that several iodothyronine compounds are present in the circulation suggested that deiodination occurs in various tissues. Subsequently, deiodination was indeed documented in in vivo studies. Later, using in vitro assay techniques, three deiodinase processes, termed types 1, 2 and 3, were defined that differed in terms of tissue distribution, reaction kinetics, efficiency of substrate utilization and sensitivity to inhibitors. Although purification of the deiodinase enzymes has continued to be problematic, recent molecular cloning studies have identified cDNAs for these three deiodinase isoforms from multiple species. These cDNAs have provided important insights into the structural characteristics of this family of enzymes. Foremost among the structural features has been the demonstration that all three deiodinase isoforms contain at their active site the uncommon amino acid selenocysteine which is of critical importance to their catalytic activity. The availability of cDNAs for these enzymes provides important reagents for pursuing additional studies aimed at defining their biochemical features and roles in thyroid hormone economy.

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Crossref · 10.1089/thy.1997.7.655

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Authors
GERMAIN, D. L. S., & GALTON, V. A.
Venue
Thyroid
Published
1997-08
Volume
7
Issue
4
Pages
655-668
ISSN
  • 1050-7256 (ISSN-L)
  • 1557-9077
OpenAlex
W2088413568
Cited by
342
References
2
Citations by year
2026: 1 · 2025: 5 · 2024: 2 · 2023: 4 · 2022: 3 · 2021: 11 · 2020: 2 · 2019: 11 · 2018: 4 · 2017: 10 · 2016: 9 · 2015: 7 · 2014: 11 · 2013: 5 · 2012: 9
FWCI
3.59
Type
journal article
Language
en
Open access
closed
Locations
  • Thyroid (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK042271, DK-42271)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD-27706, HD09020, R01HD027706, R01HD009020)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Organoselenium and organotellurium chemistry
Keywords
deiodinases, selenoproteins, selenocysteine, thyroid hormone metabolism, type 2 deiodinase, type 3 deiodinase, enzyme structure, cDNA cloning, tissue distribution
MeSH terms
Animals, Cloning, Molecular, Growth, Humans, Iodide Peroxidase, Proteins, Selenium, Thyroid Hormones, History, 19th Century, History, 20th Century, Selenoproteins

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