Monensin

Monensin A
IUPAC name 4-[2-[5-ethyl-5-[5-[6-hydroxy-6- (hydroxymethyl)-3,5-dimethyl-oxan-2-yl]- 3-methyl-oxolan-2-yl]oxolan-2-yl]- 9-hydroxy-2,8-dimethyl-1,6-dioxasp iro[4.5]dec-7-yl]-3-methoxy-2-methyl- pentanoic acid
Other names monensic acid
Identifiers
CAS number	17090-79-8 Y
PubChem	441145
ChemSpider	389937 Y
UNII	906O0YJ6ZP N
KEGG	D08228 Y
ChEBI	CHEBI:27617 N
ChEMBL	CHEMBL256105 Y
ATCvet code	QP51AH03
Jmol-3D images	Image 1
SMILES O=C(O)[C@@H](C)[C@H](OC)[C@H](C)[C@H]5O[C@]1(O[C@@](C)(CC1)[C@@H]2O[C@@](CC)(CC2)[C@@H]4O[C@@H]([C@H]3O[C@@](O)(CO)[C@@H](C[C@@H]3C)C)C[C@@H]4C)C[C@H](O)[C@H]5C
InChI InChI=1S/C36H62O11/c1-10-34(31-20(3)16-26(43-31)28-19(2)15-21(4)36(41,18-37)46-28)12-11-27(44-34)33(8)13-14-35(47-33)17-25(38)22(5)30(45-35)23(6)29(42-9)24(7)32(39)40/h19-31,37-38,41H,10-18H2,1-9H3,(H,39,40)/t19-,20-,21+,22+,23-,24-,25-,26+,27+,28-,29+,30-,31+,33-,34-,35+,36-/m0/s1 Y Key: GAOZTHIDHYLHMS-KEOBGNEYSA-N Y InChI=1/C36H62O11/c1-10-34(31-20(3)16-26(43-31)28-19(2)15-21(4)36(41,18-37)46-28)12-11-27(44-34)33(8)13-14-35(47-33)17-25(38)22(5)30(45-35)23(6)29(42-9)24(7)32(39)40/h19-31,37-38,41H,10-18H2,1-9H3,(H,39,40)/t19-,20-,21+,22+,23-,24-,25-,26+,27+,28-,29+,30-,31+,33-,34-,35+,36-/m0/s1 Key: GAOZTHIDHYLHMS-KEOBGNEYBF
Properties
Molecular formula	C36H62O11
Molar mass	670.871g/mol
Appearance	solid state, white crystals
Melting point	104°C
Solubility in water	3x10-6 g/dm3 (20 °C)
Solubility	ethanol, acetone, diethyl ether, benzene
Related compounds
Related	antibiotics, ionophores
Related compounds	Monensin A methyl ester,
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Monensin is a polyether antibiotic isolated from Streptomyces cinnamonensis. It is widely used in animal feeds.^[1]

The structure of monensin was first described by Agtarap et al. in 1967, and was the first polyether antibiotic to have its structure elucidated in this way. The first total synthesis of monensin was reported in 1979 by Kishi et al.^[2]

Mechanism of action

Monensin A is an ionophore related to the crown ethers with a preference to form complexes with monovalent cations such as: Li⁺, Na⁺, K⁺, Rb⁺, Ag⁺, and Tl⁺.^[3][4] Monensin A is able to transport these cations across lipid membranes of cells, playing an important role as an Na⁺/H⁺ antiporter. It blocks intracellular protein transport, and exhibits antibiotic, antimalarial, and other biological activities.^[5] The antibacterial properties of monensin and its derivatives are a result of their ability to transport metal cations through cellular and subcellular membranes.^[6]

The structure of the sodium (Na⁺) complex of monensin A.

Uses

Monensin is used extensively in the beef and dairy industries to prevent coccidiosis, increase the production of propionic acid and prevent bloat.^[7]. Furthermore monensin, but also its derivatives monensin methyl ester (MME), and particularly monensin decyl ester (MDE) are widely used in ion selective electrodes.^[8][9][10]

References

1. ^ Patrick Butaye, Luc A. Devriese, Freddy Haesebrouck "Antimicrobial Growth Promoters Used in Animal Feed: Effects of Less Well Known Antibiotics on Gram-Positive Bacteria" Clinical Microbiology Reviews, 2003, p. 175-188, Vol. 16. doi:10.1128/CMR.16.2.175-188.2003
2. ^ Nicolaou, K. C.; E. J. Sorensen (1996). Classics in Total Synthesis. Weinheim, Germany: VCH. pp. 185–187. ISBN 3-527-29284-5. 
3. ^ A. Huczyński, M. Ratajczak-Sitarz, A. Katrusiak, B. Brzezinski, ”Molecular structure of the 1:1 inclusion complex of Monensin A lithium salt with acetonitrile”, J. Mol. Struct., 2007, 871, 92-97, doi:10.1016/j.molstruc.2006.07.046
4. ^ M. Pinkerton, L. K. Steinrauf, "Molecular structure of monovalent metal cation complexes of monensin", J. Mol. Biol., 1970 49(3), 533-546
5. ^ H. H. Mollenhauer, D. J. Morre, L. D. Rowe, ”Alteration of intracellular traffic by monensin; mechanism, specificity and relationship to toxicity”, Biochim. Biophys. Acta, 1990, 1031(2), 225-246, doi:10.1016/0304-4157(90)90008-Z
6. ^ A. Huczyński, J. Stefańska, P. Przybylski, B. Brzezinski and F. Bartl, "Synthesis and antimicrobial properties of Monensin A esters", Bioorg. Med. Chem. Lett., 2008, 18, 2585-2589, doi:10.1016/j.bmcl.2008.03.038
7. ^ T. Matsuoka, M.N. Novilla, T.D. Thomson and A.L. Donoho, "Review of monensin toxicosis in horses", Journal of Equine Veterinary Science 16, 1996, 8-15, doi:10.1016/S0737-0806(96)80059-1
8. ^ K. Tohda, K. Suzuki, N. Kosuge, H. Nagashima, H. Inoue K. Watanabe, ”A Sodium Ion Selective Electrode Based on a Highly Lipophilic Monensin Derivative and Its Application to the Measurement of Sodium Ion Concentrations in Serum”, Anal. Sci. 6, 1990, 227-232, doi:10.2116/analsci.6.227
9. ^ N. Kim, K. Park, I. Park, Y. Cho, Y. Bae, ”Application of a taste evaluation system to the monitoring of Kimchi fermentation”, Biosensors and Bioelectronics 20, 2005, 2283-2291,doi:10.1016/j.bios.2004.10.007
10. ^ K. Toko, ”Taste Sensor”, Sensors and Actuators B: Chemical 64, 2000, 205-215, doi:10.1016/S0925-4005(99)00508-0