Roquefortine C
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| Category | Mycotoxins |
| Catalog number | BBF-04314 |
| CAS | 58735-64-1 |
| Molecular Weight | 389.45 |
| Molecular Formula | C22H23N5O2 |
| Purity | >99% by HPLC |
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Description
A potent tremorgenic mycotoxin originally isolated from penicillium roqueforti. It is a penicillium commercially used to ripen blue-veined cheese.
Specification
| Synonyms | Roquefortine; NSC 292134; (3E,5aS,10bR,11aS)-10b-(1,1-Dimethyl-2-propen-1-yl)-6,10b,11,11a-tetrahydro-3-(1H-imidazol-5-ylmethylene)-2H-pyrazino[1',2':1,5]pyrrolo[2,3-b]indole-1,4(3H,5aH)-dione; (-)-Roquefortine C; Roquefortin |
| Storage | Store at -20°C |
| IUPAC Name | (1S,4E,7S,9R)-4-(1H-imidazol-5-ylmethylidene)-9-(2-methylbut-3-en-2-yl)-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-10,12,14-triene-3,6-dione |
| Canonical SMILES | CC(C)(C=C)C12CC3C(=O)NC(=CC4=CN=CN4)C(=O)N3C1NC5=CC=CC=C25 |
| InChI | InChI=1S/C22H23N5O2/c1-4-21(2,3)22-10-17-18(28)25-16(9-13-11-23-12-24-13)19(29)27(17)20(22)26-15-8-6-5-7-14(15)22/h4-9,11-12,17,20,26H,1,10H2,2-3H3,(H,23,24)(H,25,28)/b16-9+/t17-,20-,22+/m0/s1 |
| InChI Key | SPWSUFUPTSJWNG-JJUKSXGLSA-N |
| Source | Roquefortine C is a tremorgenic mycotoxin produced primarily by Penicillium roquefortii, but also by other Penicillium species. |
Properties
| Appearance | White Lyophilisate |
| Boiling Point | 768.3°C at 760 mmHg |
| Melting Point | 202-205°C |
| Density | 1.37 g/cm3 |
| Solubility | Soluble in Ethanol, Methanol, DMF, DMSO; Poorly soluble in Water |
Toxicity
| Carcinogenicity | No indication of carcinogenicity to humans (not listed by IARC). |
| Mechanism Of Toxicity | Tremorgenic mycotoxins exert their toxic effects by interfering with neurotransmitter release, possibly by causing degeneration of nerve terminals. They are thought to inhibit gamma-aminobutyric acid (GABA) receptors, both pre- and postsynaptic, as well as inhibit transmitter breakdown at the GABA-T receptors. This would initially increase neurotransmitter levels, potentiating the GABA-induced chloride current, then lead to decreased levels of neurotransmitter in the synapse. Roquefortine C also interacts with different forms of the cytochromes. |
| Toxicity | LD50: 15-20 mg/kg (Intraperitoneal, Mouse). |
Reference Reading
1. A natural short pathway synthesizes roquefortine C but not meleagrin in three different Penicillium roqueforti strains
E Coton, J F Martín, P Liras, R Domínguez-Santos, C García-Estrada, M Coton, K Kosalková Appl Microbiol Biotechnol . 2015 Sep;99(18):7601-12. doi: 10.1007/s00253-015-6676-0.
The production of mycotoxins and other secondary metabolites in Penicillium roqueforti is of great interest because of its long history of use in blue-veined cheese manufacture. In this article, we report the cloning and characterization of the roquefortine gene cluster in three different P. roqueforti strains isolated from blue cheese in the USA (the type strain), France, and the UK (Cheshire cheese). All three strains showed an identical roquefortine gene cluster organization and almost identical (98-99%) gene nucleotide sequences in the entire 16.6-kb cluster region. When compared with the Penicillium chrysogenum roquefortine/meleagrin seven-gene cluster, the P. roqueforti roquefortine cluster contains only four genes (rds, rdh, rpt, and gmt) encoding the roquefortine dipeptide synthetase, roquefortine D dehydrogenase, roquefortine prenyltransferase, and a methyltransferase, respectively. Silencing of the rds or rpt genes by the RNAi strategy reduced roquefortine C production by 50% confirming the involvement of these two key genes in roquefortine biosynthesis. An additional putative gene, orthologous of the MFS transporter roqT, is rearranged in all three strains as a pseudogene. The same four genes and a complete (not rearranged) roqT, encoding a MFS transporter containing 12 TMS domains, occur in the seven-gene cluster in P. chrysogenum although organized differently. Interestingly, the two "late" genes of the P. chrysogenum roquefortine/meleagrin gene cluster that convert roquefortine C to glandicoline B and meleagrin are absent in the P. roqueforti four-gene cluster. No meleagrin production was detected in P. roqueforti cultures grown in YES medium, while P. chrysogenum produces meleagrin in these conditions. No orthologous genes of the two missing meleagrin synthesizing genes were found elsewhere in the recently released P. roqueforti genome. Our data suggest that during evolution, the seven-gene cluster present in P. chrysogenum, and probably also in other glandicoline/meleagrin producing fungi, has been trimmed down to a short cluster in P. roqueforti leading to the synthesis of roquefortine C rather than meleagrin as a final product.
2. Roquefortine/oxaline biosynthesis pathway metabolites in Penicillium ser. Corymbifera: in planta production and implications for competitive fitness
J Smedsgaard, K F Nielsen, D P Overy J Chem Ecol . 2005 Oct;31(10):2373-90. doi: 10.1007/s10886-005-7107-y.
Three strains of each of the seven taxa comprising the Penicillium series Corymbifera were surveyed by direct injection mass spectrometry (MS) and liquid chromatography-MS for the production of terrestric acid and roquefortine/oxaline biosynthesis pathway metabolites when cultured upon macerated tissue agars prepared from Allium cepa, Zingiber officinale, and Tulipa gesneriana, and on the defined medium Czapek yeast autolysate agar (CYA). A novel solid-phase extraction methodology was applied for the rapid purification of roquefortine metabolites from a complex matrix. Penicillium hordei and P. venetum produced roquefortine D and C, whereas P. hirsutum produced roquefortine D and C and glandicolines A and B. P. albocoremium, P. allii, and P. radicicola carried the pathway through to meleagrin, producing roquefortine D and C, glandicolines A and B, and meleagrin. P. tulipae produced all previously mentioned metabolites yet carried the pathway through to an end product recognized as epi-neoxaline, prompting the proposal of a roquefortine/epi-neoxaline biogenesis pathway. Terrestric acid production was stimulated by all Corymbifera strains on plant-derived media compared to CYA controls. In planta, production of terrestric acid, roquefortine C, glandicolines A and B, meleagrin, epi-neoxaline, and several other species-related secondary metabolites were confirmed from A. cepa bulbs infected with Corymbifera strains. The deposition of roquefortine/oxaline pathway metabolites as an extracellular nitrogen reserve for uptake and metabolism into growing mycelia and the synergistic role of terrestric acid and other Corymbifera secondary metabolites in enhancing the competitive fitness of Corymbifera species in planta are proposed.
3. Using roquefortine C as a biomarker for penitrem A intoxication
Birgit Puschner, Robert H Poppenga, Asheesh K Tiwary J Vet Diagn Invest . 2009 Mar;21(2):237-9. doi: 10.1177/104063870902100210.
Penitrem A is a well-recognized tremorgenic mycotoxin produced by several Penicillium spp. However, most natural cases of penitrem A intoxication have been associated with Penicillium crustosum. Another Penicillium sp., Penicillium roqueforti, is used for the production of blue cheese and is found in silage and feeds. Penicillium roqueforti produces a mycotoxin, roquefortine C, which is also produced by P. crustosum. In contrast to a tremorgenic syndrome produced by penitrem A, roquefortine C toxicosis is characterized by a paralytic syndrome. Two cases of penitrem A intoxication in dogs are presented to investigate the use of roquefortine C as a biomarker for penitrem A exposure. The vomitus, serum, and urine were analyzed for roquefortine C and penitrem A. Results suggest that roquefortine C can be a sensitive biomarker for penitrem A intoxication. However, the detection of roquefortine C in the absence of penitrem A could merely suggest ingestion of blue cheese or spoilt silage or feed. A review of the literature did not identify any case positive for penitrem A but negative for roquefortine C. In cases in which both mycotoxins were detected, roquefortine C concentration was always higher than penitrem A concentration. In contrast, several cases have been described where the clinical history suggested penitrem A intoxication, but only roquefortine C was detected. In conclusion, roquefortine C can serve as a sensitive biomarker for penitrem A intoxication, but the clinical presentation needs to be considered for proper interpretation of its detection in the absence of penitrem A.
Spectrum
Predicted LC-MS/MS Spectrum - 10V, Positive
Experimental Conditions
Ionization Mode: Positive
Collision Energy: 10 eV
Instrument Type: QTOF (generic), spectrum predicted by CFM-ID
Mass Resolution: 0.0001 Da
Collision Energy: 10 eV
Instrument Type: QTOF (generic), spectrum predicted by CFM-ID
Mass Resolution: 0.0001 Da
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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 ╳
