Pyrenophorol
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| Category | Enzyme inhibitors |
| Catalog number | BBF-04442 |
| CAS | 22248-41-5 |
| Molecular Weight | 312.36 |
| Molecular Formula | C16H24O6 |
| Purity | >95% by HPLC |
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Description
A simple macrocyclic dilactone produced by a number of species of pathogenic fungi, including byssochlamys, stenphyllum, alternaria and drechslera. It exhibits antibacterial, herbicidal and anthelmintic properties. It is a weak inhibitor of propyl endopeptidases and can inhibit seed germination.
Specification
| Synonyms | (-)-Pyrenophorol; Helmidiol; (5S,8R,13S,16R)-(-)-pyrenophorol |
| Storage | Store at -20°C |
| IUPAC Name | (3E,5S,8R,11E,13S,16R)-5,13-dihydroxy-8,16-dimethyl-1,9-dioxacyclohexadeca-3,11-diene-2,10-dione |
| Canonical SMILES | CC1CCC(C=CC(=O)OC(CCC(C=CC(=O)O1)O)C)O |
| InChI | InChI=1S/C16H24O6/c1-11-3-5-13(17)8-10-16(20)22-12(2)4-6-14(18)7-9-15(19)21-11/h7-14,17-18H,3-6H2,1-2H3/b9-7+,10-8+/t11-,12-,13+,14+/m1/s1 |
| InChI Key | RBQNDQOKFICJGL-UTBFYLPBSA-N |
| Source | Unidentified fungus |
Properties
| Appearance | Colorless Residue |
| Antibiotic Activity Spectrum | Parasites; Bacterial |
| Boiling Point | 585.4±50.0°C at 760 mmHg |
| Melting Point | 136-138°C |
| Density | 1.1±0.1 g/cm3 |
| Solubility | Soluble in Ethanol, Methanol, DMF, DMSO |
Reference Reading
1. Dual effectiveness of Alternaria but not Fusarium mycotoxins against human topoisomerase II and bacterial gyrase
Doris Ellmer, Hans-Ulrich Humpf, Thomas Hofmann, Giorgia Del Favero, Katharina Jarolim, Timo D Stark, Michael Sulyok, Doris Marko Arch Toxicol . 2017 Apr;91(4):2007-2016. doi: 10.1007/s00204-016-1855-z.
Type II DNA-topoisomerases (topo II) play a crucial role in the maintenance of DNA topology. Previously, fungi of the Alternaria genus were found to produce mycotoxins that target human topo II. These results implied the question why a fungus should produce secondary metabolites that target a human enzyme. In the current work, the homology between human topo II and its bacterial equivalent, gyrase, served as basis to study a potential dual inhibition of both enzymes by mycotoxins. A total of 15 secondary metabolites produced by fungi of the genera Alternaria and Fusarium were assessed for their impact on topo II of human and bacterial origin in the decatenation and the supercoiling assay, respectively. In line with the theory of dual topo II inhibition, six of the tested Alternaria mycotoxins were active against both enzymes, the dibenzo-α-pyrones alternariol (AOH) and alternariol monomethyl ether (AME), as well as the perylene-quinones altertoxin I (ATX I) and II (ATX II), alterperylenol (ALP) and stemphyltoxin III (STTX III). The Alternaria metabolites altersetin (ALN), macrosporin (MAC), altenusine (ALS) and pyrenophorol (PYR) impaired the function of human topo II, but did not show any effect on gyrase. The potency to inhibit topo II activity declined in the row STTX III (initial inhibitory concentration 10 µM) > AOH (25 µM) = AME (25 µM) = ALS (25 µM) = ATX II (25 µM) > ALN (50 µM) = ATX I (50 µM) > ALP (75 µM) = PYR (75 µM) > MAC (150 µM). Inhibition of gyrase activity was most pronounced for AOH and AME (initial inhibitory concentration 10 µM) followed by ATX II (25 µM) > ATX I = ALP = STTX III (50 µM). In contrast, none of the investigated Fusarium mycotoxins deoxynivalenol (DON), fumonisin B1, fusarin C and moniliformin, as well as the Alternaria metabolite tentoxin, had any impact on the activity of neither human nor bacterial topo II.
2. An alternative stereoselective total synthesis of (-)-pyrenophorol
Choragudi Chandrasekhar, Gurrala Alluraiah, Rudraraju Ramesh Raju, Reddymasu Sreenivasulu Nat Prod Res . 2019 Oct;33(19):2738-2743. doi: 10.1080/14786419.2018.1499636.
The total synthesis of 16-membered C2-Symmetric dilactone (-)-Pyrenophorol was accomplished starting from commercially available (S)-epoxide prepared by hydrolytic kinetic resolution of (±) - epoxide with key steps of Grignard reaction, Swern oxidation, Wittig reaction and cyclization was achieved by intermolecular Mitsunobu cyclization. The synthesis of (-)-Pyrenophorol accomplished from cheaply available starting material, easily work-up procedures and reduction of cost in industrial process were major advantages of this route.
3. Pestaloficiols Q-S from the plant endophytic fungus Pestalotiopsis fici
Ling Liu, Liangdong Guo, Shuchun Liu, Yongsheng Che Fitoterapia . 2013 Mar;85:114-8. doi: 10.1016/j.fitote.2013.01.010.
Two new isoprenylated chromone derivatives, pestaloficiols Q (1) and R (2), and one new benzofuran derivative, pestaloficiol S (3), along with three known metabolites, anofinic acid (4), siccayne (5), and pyrenophorol (6) were isolated from solid cultures of the plant endophytic fungus Pestalotiopsis fici. Their structures were elucidated primarily by NMR spectroscopy, and the absolute of the C-6 secondary alcohol in 1 was deduced on the basis of circular dichroism (CD) data. Compound 5 showed cytotoxic activity against the human cancer cell lines, HeLa and HT29, with IC50 values of 48.2 and 33.9μM, respectively.
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Bio Calculators
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
* Total Molecular Weight:
g/mol
Tip: Chemical formula is case sensitive. C22H30N4O √ c22h30n40 ╳
