NOX2
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| Идентификаторы | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Псевдонимы | CyBB , AMCBX2, CGD, GP91-1, GP91-PHOX, GP91PHOX, IMD34, NOX2, P91-PHOX, цитохром B-245, бета-цепь, CGDX | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Внешние идентификаторы | Омим : 300481 ; MGI : 88574 ; Гомологен : 68054 ; GeneCards : CyBB ; OMA : CYBB - ортологи | ||||||||||||||||||||||||||||||||||||||||||||||||||
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NADPH-оксидаза 2 ( NOX2 ), также известная как цитохрома B (558) субъединица бета или цитохрома B-245 , является белком , который у людей кодируется NOX2 геном (также называемый ген CYBB ). [ 5 ] Белок представляет собой фермент, генерирующий супероксид , который образует активные формы кислорода (АФК).
Функция
[ редактировать ]Ген CyBB кодирует цитохром B-245, бета-цепь. Этот белок является субъединицей группы белков, которая образует фермент комплекс, называемый NADPH -оксидазой, которая играет важную роль в иммунной системе. В этом комплексе цитохром B-245 Beta Chain имеет партнера по альфа-цепи (продуцируется из гена Cyba ). Как альфа, так и бета -цепи необходимы как для функционирования, а для комплекса NADPH -оксидазы требуется обе цепочки, чтобы быть функциональными. Он был предложен в качестве основного компонента микробицидной оксидазной системы фагоцитов .
Nox2 is the catalytic, membrane-bound subunit of NADPH oxidase. It is inactive until it binds to the membrane-anchored p22phox, forming the heterodimer known as flavocytochrome b558.[6] After activation, the regulatory subunits p67phox, p47phox, p40phox and a GTPase, typically Rac, are recruited to the complex to form NADPH oxidase on the plasma membrane or phagosomal membrane.[7] Nox2 itself is composed of an N-terminal transmembrane domain that binds two heme groups, and a C-terminal domain that is able to bind to FAD and NADPH.[8]
Evidence has shown that it plays an important role in atherosclerotic lesion development in the aortic arch, thoracic, and abdominal aorta. [9] [10]
It has also been shown to play a part in determining the size of a myocardial infarction due to its connection to ROS, which play a role in myocardial reperfusion injury. This was a result of the relation between Nox2 and signaling necessary for neutrophil recruitment.[11] Furthermore, it increases global post-reperfusion oxidative stress, likely due to decreased STAT3 and Erk phosphorylation.[11]
In addition, it appears that hippocampal oxidative stress is increased in septic animals due to the actions of Nox2. This connection also came about through the actions of the chemically active ROS, which work as one of the main components that help in the development of neuroinflammation associated with sepsis-associated encephalopathy (SAE).[12] Endothelial Nox2 limits NF-κB activation and TLR4 expression, which in turn attenuates the severity of hypotension and systemic inflammation induced by lipopolysaccharides (LPS).[13]
It seems that Nox2 also plays an important role in angiotensin II-mediated inward remodelling in cerebral arterioles due to the emittance of superoxides from Nox2-containing NADPH oxidases.[14]
Clinical significance
[edit]CYBB deficiency is one of five described biochemical defects associated with chronic granulomatous disease (CGD).[15] CGD is characterized by recurrent, severe infections to pathogens that are normally harmless to humans, such as the common mold Aspergillus niger, and can result from point mutations in the gene encoding Nox2. [8] In this disorder, there is decreased activity of phagocyte NADPH oxidase; neutrophils are able to phagocytize bacteria but cannot kill them in the phagocytic vacuoles. The cause of the killing defect is an inability to increase the cell's respiration and consequent failure to deliver activated oxygen into the phagocytic vacuole.[5] At least 34 disease-causing mutations in this gene have been discovered.[16]
Since Nox2 was shown to play an essential role in determining the size of a myocardial infarction, the protein can be a potential target for drug medication due to its negative effect on myocardial reperfusion.[10]
Recent evidence highly suggests that Nox2 generates ROS which contribute to reduce flow-mediated dilation (FMD) in patients with periphery artery disease (PAD). Scientists have gone to conclude that administering an antioxidant helps with inhibiting Nox2 activity and allowing in the improvement of arterial dilation.[17]
Lastly, targeting Nox2 in the bone marrow could be a great therapeutic attempt at treating vascular injury during diabetic retinopathy (damage to the retina), because the Nox2-generated ROS which are produced by the bone-marrow derived cells & local retinal cells are accumulating the vascular injury in the diabetic retina area.[18]
CYBB transcript levels are upregulated in the lung parenchyma of smokers. [19]
Interactions
[edit]Nox2 has been shown to interact directly with podocyte TRPC6 channels.[20]
References
[edit]- ^ Jump up to: a b c GRCh38: Ensembl release 89: ENSG00000165168 – Ensembl, May 2017
- ^ Jump up to: a b c GRCm38: Ensembl release 89: ENSMUSG00000015340 – Ensembl, May 2017
- ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ Jump up to: a b "Entrez Gene: CYBB cytochrome b-245, beta polypeptide (chronic granulomatous disease)".
- ^ Hervé C, Tonon T, Collén J, Corre E, Boyen C (March 2006). "NADPH oxidases in Eukaryotes: red algae provide new hints!". Current Genetics. 49 (3): 190–204. doi:10.1007/s00294-005-0044-z. PMID 16344959. S2CID 19791715.
- ^ Kawahara T, Lambeth JD (September 2007). "Molecular evolution of Phox-related regulatory subunits for NADPH oxidase enzymes". BMC Evolutionary Biology. 7 (1): 178. Bibcode:2007BMCEE...7..178K. doi:10.1186/1471-2148-7-178. PMC 2121648. PMID 17900370.
- ^ Jump up to: a b Aguirre J, Lambeth JD (November 2010). "Nox enzymes from fungus to fly to fish and what they tell us about Nox function in mammals". Free Radical Biology & Medicine. 49 (9): 1342–1353. doi:10.1016/j.freeradbiomed.2010.07.027. PMC 2981133. PMID 20696238.
- ^ Sorescu D, Weiss D, Lassègue B, Clempus RE, Szöcs K, Sorescu GP, et al. (March 2002). "Superoxide production and expression of nox family proteins in human atherosclerosis". Circulation. 105 (12): 1429–1435. doi:10.1161/01.cir.0000012917.74432.66. PMID 11914250.
- ^ Jump up to: a b Chaubey S, Jones GE, Shah AM, Cave AC, Wells CM (2013). "Nox2 is required for macrophage chemotaxis towards CSF-1". PLOS ONE. 8 (2): e54869. Bibcode:2013PLoSO...854869C. doi:10.1371/journal.pone.0054869. PMC 3562318. PMID 23383302.
- ^ Jump up to: a b Braunersreuther V, Montecucco F, Asrih M, Ashri M, Pelli G, Galan K, et al. (November 2013). "Role of NADPH oxidase isoforms NOX1, NOX2 and NOX4 in myocardial ischemia/reperfusion injury". Journal of Molecular and Cellular Cardiology. 64: 99–107. doi:10.1016/j.yjmcc.2013.09.007. PMID 24051369. S2CID 20225141.
- ^ Hernandes MS, D'Avila JC, Trevelin SC, Reis PA, Kinjo ER, Lopes LR, et al. (February 2014). "The role of Nox2-derived ROS in the development of cognitive impairment after sepsis". Journal of Neuroinflammation. 11 (1): 36. doi:10.1186/1742-2094-11-36. PMC 3974031. PMID 24571599.
- ^ Trevelin SC, Sag CM, Zhang M, Alves-Filho JC, Cunha TM, Santos CX, et al. (August 2021). "Endothelial Nox2 Limits Systemic Inflammation and Hypotension in Endotoxemia by Controlling Expression of Toll-Like Receptor 4". Shock. 56 (2): 268–277. doi:10.1097/SHK.0000000000001706. PMC 8284354. PMID 34276040.
- ^ Chan SL, Baumbach GL (26 June 2013). "Deficiency of Nox2 prevents angiotensin II-induced inward remodeling in cerebral arterioles". Frontiers in Physiology. 4: 133. doi:10.3389/fphys.2013.00133. PMC 3693079. PMID 23805104.
- ^ "CYBB cytochrome b-245 beta chain [Homo sapiens (human)] - Gene - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2022-05-10.
- ^ Šimčíková D, Heneberg P (December 2019). "Refinement of evolutionary medicine predictions based on clinical evidence for the manifestations of Mendelian diseases". Scientific Reports. 9 (1): 18577. Bibcode:2019NatSR...918577S. doi:10.1038/s41598-019-54976-4. PMC 6901466. PMID 31819097.
- ^ Loffredo L, Carnevale R, Cangemi R, Angelico F, Augelletti T, Di Santo S, et al. (April 2013). "NOX2 up-regulation is associated with artery dysfunction in patients with peripheral artery disease". International Journal of Cardiology. 165 (1): 184–192. doi:10.1016/j.ijcard.2012.01.069. PMID 22336250.
- ^ Rojas M, Zhang W, Xu Z, Lemtalsi T, Chandler P, Toque HA, et al. (2013). "Requirement of NOX2 expression in both retina and bone marrow for diabetes-induced retinal vascular injury". PLOS ONE. 8 (12): e84357. Bibcode:2013PLoSO...884357R. doi:10.1371/journal.pone.0084357. PMC 3866146. PMID 24358357.
- ^ Pintarelli G, Noci S, Maspero D, Pettinicchio A, Dugo M, De Cecco L, et al. (September 2019). "Cigarette smoke alters the transcriptome of non-involved lung tissue in lung adenocarcinoma patients". Scientific Reports. 9 (1): 13039. Bibcode:2019NatSR...913039P. doi:10.1038/s41598-019-49648-2. PMC 6736939. PMID 31506599.
- ^ Kim EY, Anderson M, Wilson C, Hagmann H, Benzing T, Dryer SE (November 2013). "NOX2 interacts with podocyte TRPC6 channels and contributes to their activation by diacylglycerol: essential role of podocin in formation of this complex". American Journal of Physiology. Cell Physiology. 305 (9): C960–C971. doi:10.1152/ajpcell.00191.2013. PMID 23948707.
Further reading
[edit]- Bolscher BG, de Boer M, de Klein A, Weening RS, Roos D (June 1991). "Point mutations in the beta-subunit of cytochrome b558 leading to X-linked chronic granulomatous disease". Blood. 77 (11): 2482–2487. doi:10.1182/blood.V77.11.2482.2482. PMID 1710153.
- Nong Y, Kandil O, Tobin EH, Rose RM, Remold HG (January 1991). "The HIV core protein p24 inhibits interferon-gamma-induced increase of HLA-DR and cytochrome b heavy chain mRNA levels in the human monocyte-like cell line THP1". Cellular Immunology. 132 (1): 10–16. doi:10.1016/0008-8749(91)90002-S. PMID 1905983.
- Dinauer MC, Pierce EA, Bruns GA, Curnutte JT, Orkin SH (November 1990). "Human neutrophil cytochrome b light chain (p22-phox). Gene structure, chromosomal location, and mutations in cytochrome-negative autosomal recessive chronic granulomatous disease". The Journal of Clinical Investigation. 86 (5): 1729–1737. doi:10.1172/JCI114898. PMC 296926. PMID 2243141.
- Royer-Pokora B, Kunkel LM, Monaco AP, Goff SC, Newburger PE, Baehner RL, et al. (1986). "Cloning the gene for an inherited human disorder--chronic granulomatous disease--on the basis of its chromosomal location". Nature. 322 (6074): 32–38. Bibcode:1986Natur.322...32R. doi:10.1038/322032a0. hdl:2027.42/62926. PMID 2425263. S2CID 4332080.
- Dinauer MC, Curnutte JT, Rosen H, Orkin SH (December 1989). "A missense mutation in the neutrophil cytochrome b heavy chain in cytochrome-positive X-linked chronic granulomatous disease". The Journal of Clinical Investigation. 84 (6): 2012–2016. doi:10.1172/JCI114393. PMC 304086. PMID 2556453.
- Dinauer MC, Orkin SH, Brown R, Jesaitis AJ, Parkos CA (1987). "The glycoprotein encoded by the X-linked chronic granulomatous disease locus is a component of the neutrophil cytochrome b complex". Nature. 327 (6124): 717–720. Bibcode:1987Natur.327..717D. doi:10.1038/327717a0. PMID 3600768. S2CID 4360786.
- Teahan C, Rowe P, Parker P, Totty N, Segal AW (1987). "The X-linked chronic granulomatous disease gene codes for the beta-chain of cytochrome b-245". Nature. 327 (6124): 720–721. Bibcode:1987Natur.327..720T. doi:10.1038/327720a0. PMID 3600769. S2CID 4357532.
- Rabbani H, de Boer M, Ahlin A, Sundin U, Elinder G, Hammarström L, et al. (October 1993). "A 40-base-pair duplication in the gp91-phox gene leading to X-linked chronic granulomatous disease". European Journal of Haematology. 51 (4): 218–222. doi:10.1111/j.1600-0609.1993.tb00634.x. PMID 7694872. S2CID 6702733.
- Pollock JD, Williams DA, Gifford MA, Li LL, Du X, Fisherman J, et al. (February 1995). "Mouse model of X-linked chronic granulomatous disease, an inherited defect in phagocyte superoxide production". Nature Genetics. 9 (2): 202–209. doi:10.1038/ng0295-202. PMID 7719350. S2CID 13341129.
- Ariga T, Sakiyama Y, Matsumoto S (October 1994). "Two novel point mutations in the cytochrome b 558 heavy chain gene, detected in two Japanese patients with X-linked chronic granulomatous disease". Human Genetics. 94 (4): 441. doi:10.1007/BF00201609. PMID 7927345. S2CID 33195989.
- Leto TL, Adams AG, de Mendez I (October 1994). "Assembly of the phagocyte NADPH oxidase: binding of Src homology 3 domains to proline-rich targets". Proceedings of the National Academy of Sciences of the United States of America. 91 (22): 10650–10654. Bibcode:1994PNAS...9110650L. doi:10.1073/pnas.91.22.10650. PMC 45079. PMID 7938008.
- Ariga T, Sakiyama Y, Tomizawa K, Imajoh-Ohmi S, Kanegasaki S, Matsumoto S (June 1993). "A newly recognized point mutation in the cytochrome b558 heavy chain gene replacing alanine57 by glutamic acid, in a patient with cytochrome b positive X-linked chronic granulomatous disease". European Journal of Pediatrics. 152 (6): 469–472. doi:10.1007/BF01955051. PMID 8101486. S2CID 8525067.
- Leusen JH, de Boer M, Bolscher BG, Hilarius PM, Weening RS, Ochs HD, et al. (May 1994). "A point mutation in gp91-phox of cytochrome b558 of the human NADPH oxidase leading to defective translocation of the cytosolic proteins p47-phox and p67-phox". The Journal of Clinical Investigation. 93 (5): 2120–2126. doi:10.1172/JCI117207. PMC 294341. PMID 8182143.
- Meindl A, Carvalho MR, Herrmann K, Lorenz B, Achatz H, Lorenz B, et al. (December 1995). "A gene (SRPX) encoding a sushi-repeat-containing protein is deleted in patients with X-linked retinitis pigmentosa". Human Molecular Genetics. 4 (12): 2339–2346. doi:10.1093/hmg/4.12.2339. PMID 8634708.
- Sathyamoorthy M, De Mendez I, Adams AG, Leto TL (апрель 1997 г.). «P40 (PHOX) подавляет активность NADPH-оксидазы посредством взаимодействия с его доменом SH3» . Журнал биологической химии . 272 (14): 9141–9146. doi : 10.1074/jbc.272.14.9141 . PMID 9083043 .
- Eklund EA, Kakar R (апрель 1997 г.). «Идентификация и характеристика TF1 (PHOX), ДНК-связывающего белка, который увеличивает экспрессию GP91 (PHOX) в клетках миелоидного лейкоза PLB985» . Журнал биологической химии . 272 (14): 9344–9355. doi : 10.1074/jbc.272.14.9344 . PMID 9083071 .
- Jendrossek V, Ritzel A, Neubauer B, Heyden S, Gahr M (февраль 1997 г.). «Удаление триплета в рамке в гене GP91-Phox у взрослых хронических гранулематозных заболеваний у взрослых пациентов с хроническим гранулематозным заболеванием с остаточной активностью NADPH-оксидазы». Европейский журнал гематологии . 58 (2): 78–85. doi : 10.1111/j.1600-0609.1997.tb00928.x . PMID 9111587 . S2CID 11920601 .
- Rae J, Newburger PE, Dinauer MC, Noack D, Hopkins PJ, Kuruto R, Curnutte JT (июнь 1998 г.). «Х-сцепленное хроническое гранулематозное заболевание: мутации в гене CyBB, кодирующие компонент GP91-Phox у дыхательной оксидазы» . Американский журнал человеческой генетики . 62 (6): 1320–1331. doi : 10.1086/301874 . PMC 1377153 . PMID 9585602 .
- Арига Т., Фурута Х, Чо К., Сакияма Ю (июль 1998). «Генетический анализ 13 семей с x-связанными хроническими гранулематозными заболеваниями выявляет низкую долю спорадических пациентов и высокую долю спорадических носителей» . Педиатрическое исследование . 44 (1): 85–92. doi : 10.1203/00006450-199807000-00014 . PMID 9667376 .
- Kumatori A, Faizunnessa NN, Suzuki S, Moriuchi T, Kurozumi H, Nakamura M (октябрь 1998 г.). «Нехомологичная рекомбинация между геном тяжелой цепи цитохрома B558 (CYBB) и LINE-1 вызывает X-связанное хроническое гранулематозное заболевание». Геномика . 53 (2): 123–128. doi : 10.1006/geno.1998.5510 . PMID 9790760 .
Внешние ссылки
[ редактировать ]- GP91PHOX+белок,+человек в Национальной библиотеке Медицинской библиотеки США. Медицинские заголовки (Mesh)
- человека CyBB Расположение генома и страница детали гена CyBB в браузере генома UCSC .
- Обзор всей структурной информации, доступной в PDB для Uniprot : P04839 (тяжелая цепь цитохрома B-245) в PDBE-KB .