Aurintricarboxylic acid (ATA) is a chemical compound that readily polymerizes in aqueous solution, forming a stable free radical that inhibits protein-nucleic acid interactions. It is a potent inhibitor of ribonuclease and topoisomerase II by preventing the binding of the nucleic acid to the enzyme. It stimulates tyrosine phosphorylation processes including the Jak2/STAT5 pathway in NB2 lymphoma cells, ErbB4 in neuroblastoma cells, and MAP kinases, Shc proteins, phosphatidylinositide 3-kinase and phospholipase Cγ in PC12 cells. It also inhibits apoptosis. It prevents down-regulation of Ca2+-impermeable GluR2 receptors and inhibits calpain, a Ca2+-activated protease that is activated during apoptosis.[1]
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| Names | |
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| Preferred IUPAC name
3,3′-[(3-Carboxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylene]bis(6-hydroxybenzoic acid) | |
| Other names
5,5′-[(3-Carboxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylene]bis(2-hydroxybenzoic acid)
Aluminon free acid | |
| Identifiers | |
3D model (JSmol)
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| Abbreviations | ATA |
| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.022.390 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| C22H14O9 | |
| Molar mass | 422.345 g·mol−1 |
| Appearance | Dark red to brown powder |
| Melting point | 300 °C (572 °F; 573 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It is used to inhibit protein biosynthesis in its initial stages. Nominally, it is used in biological experiments as a protein inhibitor, and as an ammonium salt (known as aluminon) it is used as a reagent to estimate the aluminium in water, biological tissue, and foods.[2]
It was found that ATA is a strong inhibitor of topoisomerases and other nucleases. It might be useful for increasing efficiency of RNA isolation.[3]
It has been discovered that using aurintricarboxylic acid against influenza-A post-infection has a strong protective effect by inhibiting the virus' ability to reproduce. In cultured canine kidney cells, it was found to reduce viral reproduction and infection when applied post-infection, but not when used as a 'vaccine'.[4] It has also been shown to block the binding of the HIV coat molecule gp120 to the CD4 co-receptor on T cells through which it invades.[citation needed]
Aurintricarboxylic acid and its ammonium salt shows antiviral activity in vitro against coronaviruses such as SARS, MERS and SARS-CoV-2, and while it is unlikely to have suitable properties to be developed as a medicine in its own right, it has proved useful in scientific research into novel antiviral drugs to combat these diseases.[5][6]
Preparation edit
Aurintricarboxylic acid can be prepared by the condensation of formaldehyde with salicylic acid in the presence of nitrite-containing sulfuric acid.[7]
References edit
- ^ a b "Aurintricarboxylic acid". Sigma-Aldrich.
- ^ "Aurintricarboxylic Acid". Reference.MD.
- ^ Skidmore AF, Beebee TJ (October 1989). "Characterization and use of the potent ribonuclease inhibitor aurintricarboxylic acid for the isolation of RNA from animal tissues". The Biochemical Journal. 263 (1): 73–80. doi:10.1042/bj2630073. PMC 1133392. PMID 2481441.
- ^ Hashem AM, Flaman AS, Farnsworth A, Brown EG, Van Domselaar G, He R, Li X (December 2009). "Aurintricarboxylic acid is a potent inhibitor of influenza A and B virus neuraminidases". PLOS ONE. 4 (12): e8350. Bibcode:2009PLoSO...4.8350H. doi:10.1371/journal.pone.0008350. PMC 2792043. PMID 20020057.
- ^ Liu C, Zhou Q, Li Y, Garner LV, Watkins SP, Carter LJ, et al. (2020). "Research and Development on Therapeutic Agents and Vaccines for COVID-19 and Related Human Coronavirus Diseases". ACS Central Science. 6 (3): 315–331. doi:10.1021/acscentsci.0c00272. PMC 7094090. PMID 32226821.
- ^ Morse JS, Lalonde T, Xu S, Liu WR (March 2020). "Learning from the Past: Possible Urgent Prevention and Treatment Options for Severe Acute Respiratory Infections Caused by 2019-nCoV". ChemBioChem. 21 (5): 730–738. doi:10.1002/cbic.202000047. PMC 7162020. PMID 32022370.
- ^ Vogel AI. Practical Organic Chemistry Including Qualitative Organic Analysis.