Peroxiredoxin-5 (PRDX5), mitochondrial is a protein that in humans is encoded by the PRDX5gene, located on chromosome 11.[5]
This gene encodes a member of the six-member peroxiredoxin family of antioxidant enzymes. Like the other five members, PRDX5 is widely expressed in tissues but differs by its large subcellular distribution.[6] In human cells, it has been shown that PRDX5 can be localized to mitochondria, peroxisomes, the cytosol, and the nucleus.[7] Human PRDX5 is identified by virtue of the sequence homologies to yeast peroxisomal antioxidant enzyme PMP20.[6][8]
Biochemically, PRDX5 is a peroxidase that can use cytosolic or mitochondrial thioredoxins to reduce alkyl hydroperoxides or peroxynitrite with high rate constants in the 106 to 107 M−1s−1 range, whereas its reaction with hydrogen peroxide is more modest, in the 105 M−1s−1 range.[7] So far, PRDX5 has been shown to be a cytoprotective antioxidant enzyme that inhibits endogenous or exogenous peroxide accumulation.[7]
Structure
According to its amino acid sequence, this 2-Cys peroxiredoxin, PRDX5, is the most divergent isoform among mammalian peroxiredoxins, processing only 28% to 30% sequence identity with typical 2-Cys and 1-Cys peroxiredoxins.[9] The divergent amino acid sequence of this atypical peroxiredoxin is reflected in its unique crystal structure. The typical peroxiredoxin is composed of a thioredoxin domain and a C-terminal, whereas PRDX5 has an N-terminal domain and a unique alpha helix replaces a loop structure in the typical thioredoxin domain.[7] In addition, typical 2-Cys or 1-Cys peroxiredoxins are associated as anti-parallel dimers via linkage of two beta-7-strands, whereas a PRDX5 dimer is formed by close contact between an alpha-3-helix of one molecule and an alpha-5-helix from the other molecule.[7]
Function
As a peroxiredoxin, PRDX5 has antioxidative and cytoprotective functions during oxidative stress. Overexpression of human PRDX5 has been shown to inhibit peroxide accumulation induced by TNF-alpha, PDGF, and p53 in NIH3T3 and HeLa cells and reduce cell death by exogenous peroxide in multiple organelles of CHO, HT-22, and human tendon cells.[6][10][11][12][13] Meanwhile, reduced expression of PRDX5 induces cell susceptibility to oxidative damage and etoposide, doxorubicin, MPP+, and peroxide-induced apoptosis.[14][15][16][17] In addition, expressing human PRDX5 in other organisms or tissues such as yeast, mouse brain, and Xenopus embryos also leads to protection against oxidative stress.[18][19][20] PRDX5 in Drosophila melanogaster has been shown to promote longevity in addition to antioxidant activity.[21]
Clinical significance
By examining 98 stroke patients, Kunze et al. showed an inverse correlation between stroke progression and PRDX5 concentration, suggesting that plasma PRDX5 can be a potential biomarker of inflammation in acute stroke.[22] In human breast cancer cells, knockdown of transcription factor, GATA1, led to increased expression of PRDX5 and inhibition of apoptosis.[10] A substantial increase in PRDX5 expression has been observed in astrocytes in multiple sclerosis lesion.[23] PRDX5 has also been identified as a candidate risk gene for the inflammatory disease, sarcoidosis.[24]
Interactions
Transcription factor GATA-binding protein 1 can bind to the PRDX5 gene and lead to increased expression of PRDX5.[10] PRDX5 has been shown to physically interact with PRDX1, PRDX2, PRDX6, SOD1, and PARK7 in at least two independent high-throughput proteomic analyses.[25]
^ abcZhou Y, Kok KH, Chun AC, Wong CM, Wu HW, Lin MC, Fung PC, Kung H, Jin DY (February 2000). "Mouse peroxiredoxin V is a thioredoxin peroxidase that inhibits p53-induced apoptosis". Biochemical and Biophysical Research Communications. 268 (3): 921–7. doi:10.1006/bbrc.2000.2231. PMID10679306.
^ abcdeKnoops B, Goemaere J, Van der Eecken V, Declercq JP (August 2011). "Peroxiredoxin 5: structure, mechanism, and function of the mammalian atypical 2-Cys peroxiredoxin". Antioxidants & Redox Signaling. 15 (3): 817–29. doi:10.1089/ars.2010.3584. PMID20977338.
^Leyens G, Donnay I, Knoops B (December 2003). "Cloning of bovine peroxiredoxins-gene expression in bovine tissues and amino acid sequence comparison with rat, mouse and primate peroxiredoxins". Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology. 136 (4): 943–55. doi:10.1016/S1096-4959(03)00290-2. PMID14662316.
^Banmeyer I, Marchand C, Verhaeghe C, Vucic B, Rees JF, Knoops B (January 2004). "Overexpression of human peroxiredoxin 5 in subcellular compartments of Chinese hamster ovary cells: effects on cytotoxicity and DNA damage caused by peroxides". Free Radical Biology & Medicine. 36 (1): 65–77. doi:10.1016/j.freeradbiomed.2003.10.019. PMID14732291.
^Yuan J, Murrell GA, Trickett A, Landtmeters M, Knoops B, Wang MX (July 2004). "Overexpression of antioxidant enzyme peroxiredoxin 5 protects human tendon cells against apoptosis and loss of cellular function during oxidative stress". Biochimica et Biophysica Acta (BBA) - Molecular Cell Research. 1693 (1): 37–45. doi:10.1016/j.bbamcr.2004.04.006. PMID15276323.
^Avila PC, Kropotov AV, Krutilina R, Krasnodembskay A, Tomilin NV, Serikov VB (2008). "Peroxiredoxin V contributes to antioxidant defense of lung epithelial cells". Lung. 186 (2): 103–14. doi:10.1007/s00408-007-9066-2. PMID18219526. S2CID22699804.
^De Simoni S, Goemaere J, Knoops B (March 2008). "Silencing of peroxiredoxin 3 and peroxiredoxin 5 reveals the role of mitochondrial peroxiredoxins in the protection of human neuroblastoma SH-SY5Y cells toward MPP+". Neuroscience Letters. 433 (3): 219–24. doi:10.1016/j.neulet.2007.12.068. PMID18262354. S2CID44405952.
^Kropotov A, Gogvadze V, Shupliakov O, Tomilin N, Serikov VB, Tomilin NV, Zhivotovsky B (September 2006). "Peroxiredoxin V is essential for protection against apoptosis in human lung carcinoma cells". Experimental Cell Research. 312 (15): 2806–15. doi:10.1016/j.yexcr.2006.05.006. PMID16781710.
^Serikov VB, Leutenegger C, Krutilina R, Kropotov A, Pleskach N, Suh JH, Tomilin NV (January 2006). "Cigarette smoke extract inhibits expression of peroxiredoxin V and increases airway epithelial permeability". Inhalation Toxicology. 18 (1): 79–92. Bibcode:2006InhTx..18...79S. doi:10.1080/08958370500282506. PMID16326404. S2CID24148404.
^Holley JE, Newcombe J, Winyard PG, Gutowski NJ (September 2007). "Peroxiredoxin V in multiple sclerosis lesions: predominant expression by astrocytes". Multiple Sclerosis. 13 (8): 955–61. doi:10.1177/1352458507078064. PMID17623739. S2CID19626529.
^Fischer A, Schmid B, Ellinghaus D, Nothnagel M, Gaede KI, Schürmann M, Lipinski S, Rosenstiel P, Zissel G, Höhne K, Petrek M, Kolek V, Pabst S, Grohé C, Grunewald J, Ronninger M, Eklund A, Padyukov L, Gieger C, Wichmann HE, Nebel A, Franke A, Müller-Quernheim J, Hofmann S, Schreiber S (November 2012). "A novel sarcoidosis risk locus for Europeans on chromosome 11q13.1". American Journal of Respiratory and Critical Care Medicine. 186 (9): 877–85. doi:10.1164/rccm.201204-0708OC. PMID22837380.
Wood ZA, Schröder E, Robin Harris J, Poole LB (January 2003). "Structure, mechanism and regulation of peroxiredoxins". Trends in Biochemical Sciences. 28 (1): 32–40. doi:10.1016/S0968-0004(02)00003-8. PMID12517450.
Hochstrasser DF, Frutiger S, Paquet N, Bairoch A, Ravier F, Pasquali C, Sanchez JC, Tissot JD, Bjellqvist B, Vargas R (December 1992). "Human liver protein map: a reference database established by microsequencing and gel comparison". Electrophoresis. 13 (12): 992–1001. doi:10.1002/elps.11501301201. PMID1286669. S2CID23518983.
Zhou Y, Kok KH, Chun AC, Wong CM, Wu HW, Lin MC, Fung PC, Kung H, Jin DY (February 2000). "Mouse peroxiredoxin V is a thioredoxin peroxidase that inhibits p53-induced apoptosis". Biochemical and Biophysical Research Communications. 268 (3): 921–7. doi:10.1006/bbrc.2000.2231. PMID10679306.
Leyens G, Donnay I, Knoops B (December 2003). "Cloning of bovine peroxiredoxins-gene expression in bovine tissues and amino acid sequence comparison with rat, mouse and primate peroxiredoxins". Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology. 136 (4): 943–55. doi:10.1016/S1096-4959(03)00290-2. PMID14662316.
Banmeyer I, Marchand C, Verhaeghe C, Vucic B, Rees JF, Knoops B (January 2004). "Overexpression of human peroxiredoxin 5 in subcellular compartments of Chinese hamster ovary cells: effects on cytotoxicity and DNA damage caused by peroxides". Free Radical Biology & Medicine. 36 (1): 65–77. doi:10.1016/j.freeradbiomed.2003.10.019. PMID14732291.
Salmon M, Dedessus Le Moutier J, Wenders F, Chiarizia S, Eliaers F, Remacle J, Royer V, Pascal T, Toussaint O (January 2004). "Role of the PLA2-independent peroxiredoxin VI activity in the survival of immortalized fibroblasts exposed to cytotoxic oxidative stress". FEBS Letters. 557 (1–3): 26–32. Bibcode:2004FEBSL.557...26S. doi:10.1016/S0014-5793(03)01437-6. PMID14741336. S2CID9208097.
Yuan J, Murrell GA, Trickett A, Landtmeters M, Knoops B, Wang MX (July 2004). "Overexpression of antioxidant enzyme peroxiredoxin 5 protects human tendon cells against apoptosis and loss of cellular function during oxidative stress". Biochimica et Biophysica Acta (BBA) - Molecular Cell Research. 1693 (1): 37–45. doi:10.1016/j.bbamcr.2004.04.006. PMID15276323.