Dual oxidase 2

Last updated
DUOX2
Identifiers
Aliases DUOX2 , LNOX2, NOXEF2, P138-TOX, TDH6, THOX2, dual oxidase 2
External IDs OMIM: 606759 MGI: 3036280 HomoloGene: 9689 GeneCards: DUOX2
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_014080
NM_001363711

NM_177610
NM_001362755

RefSeq (protein)

NP_054799
NP_001350640

NP_808278
NP_001349684

Location (UCSC) Chr 15: 45.09 – 45.11 Mb Chr 2: 122.11 – 122.13 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Dual oxidase 2, also known as DUOX2 or ThOX2 (for thyroid oxidase), is an enzyme that in humans is encoded by the DUOX2 gene. [5] [6] Dual oxidase is an enzyme that was first identified in the mammalian thyroid gland. In humans, two isoforms are found; hDUOX1 and hDUOX2 (this enzyme). The protein location is not exclusive to thyroid tissue; hDUOX1 is prominent in airway epithelial cells [7] and hDUOX2 in the salivary glands and gastrointestinal tract. [8] [9] [10]

Contents

Function

Investigations into reactive oxygen species (ROS) in biological systems have, until recently, focused on characterization of phagocytic cell processes. It is now well accepted that production of such species is not restricted to phagocytic cells and can occur in eukaryotic non-phagocytic cell types via NADPH oxidase (NOX) or dual oxidase (DUOX). This new family of proteins, termed the NOX/DUOX family or NOX family of NADPH oxidases, consists of homologs to the catalytic moiety of phagocytic NADPH-oxidase, gp91phox. Members of the NOX/DUOX family have been found throughout eukaryotic species, including invertebrates, insects, nematodes, fungi, amoeba, algae, and plants (not found in prokaryotes). These enzymes clearly demonstrate regulated production of ROS as their sole function. Genetic analyses have implicated NOX/DUOX derived ROS in biological roles and pathological conditions including hypertension (NOX1), innate immunity (NOX2/DUOX), otoconia formation in the inner ear (NOX3) and thyroid hormone biosynthesis (DUOX1/2).DUOX2 is the isoform that generates H2O2 utilized by thyroid peroxidase (TPO) for the biosynthesis of thyroid hormones, [11] supported by the discovery of congenital hypothyroidism resultant from an inactivating mutation in the DUOX2 gene. [5] [12]

The family currently has seven members including NOX1, NOX2 (formerly known as gp91phox), NOX3, NOX4, NOX5, DUOX1 and DUOX2.

This protein is known as a dual oxidase because it has both a peroxidase homology domain and a gp91phox domain. [13]

Duox are also implicated in lung defence system [14] and especially in cystic fibrosis. [15] [16] [17]

Schema of duox implication in human lung defence system

Schematic diagram of the respiratory tract antimicrobial defense system. Schemaduoxlpo en.png
Schematic diagram of the respiratory tract antimicrobial defense system.

Related Research Articles

NADPH oxidase is a membrane-bound enzyme complex that faces the extracellular space. It can be found in the plasma membrane as well as in the membranes of phagosomes used by neutrophil white blood cells to engulf microorganisms. Human isoforms of the catalytic component of the complex include NOX1, NOX2, NOX3, NOX4, NOX5, DUOX1, and DUOX2.

<span class="mw-page-title-main">NOX2</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase 2 (Nox2), also known as cytochrome b(558) subunit beta or Cytochrome b-245 heavy chain, is a protein that in humans is encoded by the NOX2 gene. The protein is a superoxide generating enzyme which forms reactive oxygen species (ROS).

<span class="mw-page-title-main">Retinoid X receptor alpha</span> Protein-coding gene in the species Homo sapiens

Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 is a nuclear receptor that in humans is encoded by the RXRA gene.

<span class="mw-page-title-main">Neutrophil cytosolic factor 1</span> Protein-coding gene in the species Homo sapiens

Neutrophil cytosol factor 1, also known as p47phox, is a protein that in humans is encoded by the NCF1 gene.

<span class="mw-page-title-main">NOX1</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase 1 is an enzyme that in humans is encoded by the NOX1 gene.

<span class="mw-page-title-main">NOX4</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase 4 is an enzyme that in humans is encoded by the NOX4 gene, and is a member of the NOX family of NADPH oxidases.

<span class="mw-page-title-main">Thyroid hormone receptor beta</span> Protein-coding gene in the species Homo sapiens

Thyroid hormone receptor beta (TR-beta) also known as nuclear receptor subfamily 1, group A, member 2 (NR1A2), is a nuclear receptor protein that in humans is encoded by the THRB gene.

<span class="mw-page-title-main">Cytochrome b-245, alpha polypeptide</span> Protein-coding gene in the species Homo sapiens

Cytochrome b-245 light chain is a protein that in humans is encoded by the CYBA gene involved in superoxide production and phagocytosis.

<span class="mw-page-title-main">RAC2</span> Protein-coding gene in the species Homo sapiens

Rac2 is a small signaling G protein, and is a member of the Rac subfamily of the family Rho family of GTPases. It is encoded by the gene RAC2.

<span class="mw-page-title-main">Neutrophil cytosolic factor 4</span> Protein-coding gene in the species Homo sapiens

Neutrophil cytosol factor 4 is a protein that in humans is encoded by the NCF4 gene.

<span class="mw-page-title-main">ARHGDIA</span> Protein-coding gene in the species Homo sapiens

Rho GDP-dissociation inhibitor 1 is a protein that in humans is encoded by the ARHGDIA gene.

<span class="mw-page-title-main">Dual oxidase 1</span> Protein-coding gene in the species Homo sapiens

Dual oxidase 1, also known as DUOX1 or ThOX1, is an enzyme which in humans is encoded by the DUOX1 gene. DUOX1 was first identified in the mammalian thyroid gland. In humans, two isoforms are found; hDUOX1 and hDUOX2. Human DUOX protein localization is not exclusive to thyroid tissue; hDUOX1 is prominent in airway epithelial cells and hDUOX2 in the salivary glands and gastrointestinal tract.

<span class="mw-page-title-main">NOX5</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase, EF-hand calcium binding domain 5, also known as NOX5, is a protein which in humans is encoded by the NOX5 gene.

<span class="mw-page-title-main">NOXO1</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase organizer 1 is an enzyme that in humans is encoded by the NOXO1 gene.

<span class="mw-page-title-main">NOX3</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase 3 is an enzyme that in humans is encoded by the NOX3 gene.

<span class="mw-page-title-main">NOXA1</span> Protein-coding gene in the species Homo sapiens

NADPH oxidase activator 1 is an enzyme that in humans is encoded by the NOXA1 gene.

<span class="mw-page-title-main">NDOR1</span> Protein-coding gene in the species Homo sapiens

NADPH-dependent diflavin oxidoreductase 1 is an enzyme that in humans is encoded by the NDOR1 gene.

<span class="mw-page-title-main">Iodotyrosine deiodinase</span> Protein-coding gene in the species Homo sapiens

Iodotyrosine deiodinase, also known as iodotyrosine dehalogenase 1, is a type of deiodinase enzyme that scavenges iodide by removing it from iodinated tyrosine residues in the thyroid gland. These iodinated tyrosines are produced during thyroid hormone biosynthesis. The iodide that is scavenged by iodotyrosine deiodinase is necessary to again synthesize the thyroid hormones. After synthesis, the thyroid hormones circulate through the body to regulate metabolic rate, protein expression, and body temperature. Iodotyrosine deiodinase is thus necessary to keep levels of both iodide and thyroid hormones in balance.

The respiratory tract antimicrobial defense system is a layered defense mechanism which relies on components of both the innate and adaptive immune systems to protect the lungs and the rest of the respiratory tract against inhaled microorganisms.

Edgar Pick is an Israeli immunologist who is Professor Emeritus of Immunology in the Department of Clinical Microbiology and Immunology at the Faculty of Medicine at Tel Aviv University, Israel.

References

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  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000068452 - Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. 1 2 Dupuy C, Ohayon R, Valent A, Noël-Hudson MS, Dème D, Virion A (December 1999). "Purification of a novel flavoprotein involved in the thyroid NADPH oxidase. Cloning of the porcine and human cdnas". J. Biol. Chem. 274 (52): 37265–9. doi: 10.1074/jbc.274.52.37265 . PMID   10601291.
  6. De Deken X, Wang D, Many MC, Costagliola S, Libert F, Vassart G, Dumont JE, Miot F (July 2000). of Two Human Thyroid cDNAs Encoding New Members of the NADPH Oxidase Family.pdf "Cloning of two human thyroid cDNAs encoding new members of the NADPH oxidase family" (PDF). J. Biol. Chem. 275 (30): 23227–33. doi: 10.1074/jbc.M000916200 . PMID   10806195. S2CID   19424568.{{cite journal}}: Check |url= value (help)
  7. Harper RW, Xu C, Eiserich JP, Chen Y, Kao CY, Thai P, Setiadi H, Wu R (August 2005). "Differential regulation of dual NADPH oxidases/peroxidases, Duox1 and Duox2, by Th1 and Th2 cytokines in respiratory tract epithelium". FEBS Lett. 579 (21): 4911–7. doi: 10.1016/j.febslet.2005.08.002 . PMID   16111680. S2CID   34266530.
  8. Geiszt M, Witta J, Baffi J, Lekstrom K, Leto TL (August 2003). "Dual oxidases represent novel hydrogen peroxide sources supporting mucosal surface host defense". FASEB J. 17 (11): 1502–4. doi: 10.1096/fj.02-1104fje . PMID   12824283. S2CID   2187431.
  9. El Hassani RA, Benfares N, Caillou B, Talbot M, Sabourin JC, Belotte V, Morand S, Gnidehou S, Agnandji D, Ohayon R, Kaniewski J, Noël-Hudson MS, Bidart JM, Schlumberger M, Virion A, Dupuy C (May 2005). "Dual oxidase2 is expressed all along the digestive tract". Am. J. Physiol. Gastrointest. Liver Physiol. 288 (5): G933–42. CiteSeerX   10.1.1.334.1785 . doi:10.1152/ajpgi.00198.2004. PMID   15591162.
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  11. Visser, T. J. (2018). Regulation of Thyroid Function, Synthesis, and Function of Thyroid Hormones. In P. Vitti & L. Hegedüs (Eds.), Thyroid Diseases Pathogenesis, Diagnosis, and Treatment. Springer.
  12. Moreno JC, Bikker H, Kempers MJ, van Trotsenburg AS, Baas F, de Vijlder JJ, Vulsma T, Ris-Stalpers C (July 2002). "Inactivating mutations in the gene for thyroid oxidase 2 (THOX2) and congenital hypothyroidism". N. Engl. J. Med. 347 (2): 95–102. doi: 10.1056/NEJMoa012752 . PMID   12110737.
  13. "Entrez Gene: DUOX2 dual oxidase 2".
  14. Fischer H (October 2009). "Mechanisms and function of DUOX in epithelia of the lung". Antioxid. Redox Signal. 11 (10): 2453–65. doi:10.1089/ARS.2009.2558. PMC   2823369 . PMID   19358684.
  15. Rada B, Lekstrom K, Damian S, Dupuy C, Leto TL (October 2008). "The Pseudomonas toxin pyocyanin inhibits the dual oxidase-based antimicrobial system as it imposes oxidative stress on airway epithelial cells". J. Immunol. 181 (7): 4883–93. doi:10.4049/jimmunol.181.7.4883. PMC   2776642 . PMID   18802092.
  16. Conner GE, Salathe M, Forteza R (December 2002). "Lactoperoxidase and hydrogen peroxide metabolism in the airway". Am. J. Respir. Crit. Care Med. 166 (12 Pt 2): S57–61. doi:10.1164/rccm.2206018. PMID   12471090.
  17. Rada B, Leto TL (2008). "Oxidative innate immune defenses by Nox/Duox family NADPH oxidases". Trends in Innate Immunity. Contributions to Microbiology. Vol. 15. pp. 164–87. doi:10.1159/000136357. ISBN   978-3-8055-8548-4. PMC   2776633 . PMID   18511861.{{cite book}}: |journal= ignored (help)

Further reading