Ionomycin

Last updated
Ionomycin
Ionomycin (free acid).svg
Names
IUPAC name
(4R,6S,8S,10Z,12R,14R,16E,18R,19R,20S,21S)-19,21-Dihydroxy-22-{(2S,2′R,5S,5′S)-5′-[(1R)-1-hydroxyethyl]-2,5′-dimethyloctahydro-2,2′-bifuran-5-yl}-4,6,8,12,14,18,20-heptamethyl-11-oxido-9-oxodocosa-10,16-dienoic acid
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.121.228 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
UNII
  • InChI=1S/C41H72O9/c1-25(21-29(5)34(43)24-35(44)30(6)22-27(3)20-26(2)14-15-38(46)47)12-11-13-28(4)39(48)31(7)36(45)23-33-16-18-41(10,49-33)37-17-19-40(9,50-37)32(8)42/h11,13,24-33,36-37,39,42-43,45,48H,12,14-23H2,1-10H3,(H,46,47)/b13-11+,34-24-/t25-,26-,27+,28-,29-,30+,31+,32-,33+,36+,37-,39-,40+,41+/m1/s1 X mark.svgN
    Key: PGHMRUGBZOYCAA-ADZNBVRBSA-N X mark.svgN
  • InChI=1/C41H72O9/c1-25(21-29(5)34(43)24-35(44)30(6)22-27(3)20-26(2)14-15-38(46)47)12-11-13-28(4)39(48)31(7)36(45)23-33-16-18-41(10,49-33)37-17-19-40(9,50-37)32(8)42/h11,13,24-33,36-37,39,42-43,45,48H,12,14-23H2,1-10H3,(H,46,47)/b13-11+,34-24-/t25-,26-,27+,28-,29-,30+,31+,32-,33+,36+,37-,39-,40+,41+/m1/s1
    Key: PGHMRUGBZOYCAA-ADZNBVRBBY
  • C[C@H](CCC(=O)O)C[C@H](C)C[C@H](C)C(=O)/C=C(/[C@H](C)C[C@H](C)C/C=C/[C@@H](C)[C@H]([C@@H](C)[C@H](C[C@@H]1CC[C@@](O1)(C)[C@H]2CC[C@@](O2)(C)[C@@H](C)O)O)O)\O
Properties
C41H72O9
Molar mass 709.0050 g/mol
Solubility insoluble in water, soluble in fats, DMSO, [1] heptane and hexane [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ionomycin is an ionophore and an antibiotic that binds calcium ions (Ca2+) in a ratio 1:1. It is produced by the bacterium Streptomyces conglobatus . [3] It binds also other divalent cations like magnesium and cadmium, but binds Ca2+ preferably. [1] [2]

It has 14 chiral centers. Its β-diketone and carboxylic acid group form a chelate with calcium. [3]

It was extracted in 1978 and the complete structure was described in 1979. [2] [3]

It is used in research to raise the intracellular calcium level (Ca2+) and as a research tool to understand Ca2+ transport across biological membranes. [3]

Ionomycin is often sold as a free acid, or as a Ca2+ salt. Both are insoluble in water, but soluble in fats and DMSO. Because of their fat solubility, they bind to proteins like albumin, which may interfere with their use in studies involving blood. [1]

References

  1. 1 2 3 Kao J, et al. (2010). "Practical aspects of measuring intracellular calcium signals with fluorescent indicators" . Methods in Cell Biology. 99: 113–152. doi:10.1016/B978-0-12-374841-6.00005-0. ISBN   9780123748416. ISSN   0091-679X. PMID   21035685.
  2. 1 2 3 Toeplitz BK, et al. (1979). "Structure of ionomycin - a novel diacidic polyether antibiotic having high affinity for calcium ions" . Journal of the American Chemical Society. 101 (12): 3344–3353. doi:10.1021/ja00506a035. ISSN   0002-7863.
  3. 1 2 3 4 Lautens M, et al. (2002). "Total synthesis of ionomycin using ring-opening strategies". Organic Letters. 4 (11): 1879–1882. doi:10.1021/ol025872f. ISSN   1523-7060. PMID   12027637.
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