Tautomycin is naturally occurring antifungal antibiotic found in shellfish and is produced by the bacterium Streptomyces spiroverticillatus. It is a polyketide-based structure characterized by a three hydroxyl groups, two ketones, a dialkylmaleic anhydride, an ester linkage (connecting anhydride unit to polyketide chain), a spiroketal and one methyl ether among others. Tautomycin is an antifungal antibiotic that is a potent and specific inhibitor of protein phosphatases 1 and 2A and induces contraction of smooth muscle under Ca2+-free conditions, with Kiapp values of 0.16 nM and 0.4 nM for PP1 and PP2A, respectively.

Physicochemical Properties

Molecular Formula	C41H66O13
Molecular Weight	766.95494
Exact Mass	766.45
CAS #	109946-35-2
PubChem CID	3034761
Appearance	Typically exists as solid at room temperature
Density	1.18g/cm3
Boiling Point	854.3ºC at 760mmHg
Flash Point	247.5ºC
Vapour Pressure	5.62E-34mmHg at 25°C
Index of Refraction	1.527
LogP	4.785
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	13
Rotatable Bond Count	21
Heavy Atom Count	54
Complexity	1360
Defined Atom Stereocenter Count	13
SMILES	C[C@@H]([C@]([C@H](CC1)C)([H])O[C@@]1(CC[C@H]2C)O[C@H]2CC[C@H](C)C(C)=O)CC[C@H](O)[C@H](C)C(C[C@@H](O)[C@H](OC)[C@@H](C(C)C)OC(C[C@H](C(C(O3)=O)=C(C3=O)C)O)=O)=O
InChi Key	RFCWHQNNCOJYTR-QKIDKDKQSA-N
InChi Code	InChI=1S/C41H66O13/c1-21(2)36(51-34(47)20-31(45)35-27(8)39(48)52-40(35)49)38(50-10)32(46)19-30(44)26(7)29(43)13-11-24(5)37-25(6)16-18-41(54-37)17-15-23(4)33(53-41)14-12-22(3)28(9)42/h21-26,29,31-33,36-38,43,45-46H,11-20H2,1-10H3/t22-,23+,24+,25-,26-,29-,31+,32+,33-,36+,37-,38-,41+/m0/s1
Chemical Name	[(3R,4S,5R,8S,9S,12R)-12-[(2S,3S,6R,8S,9R)-3,9-dimethyl-8-[(3S)-3-methyl-4-oxopentyl]-1,7-dioxaspiro[5.5]undecan-2-yl]-5,9-dihydroxy-4-methoxy-2,8-dimethyl-7-oxotridecan-3-yl] (3R)-3-hydroxy-3-(4-methyl-2,5-dioxofuran-3-yl)propanoate
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Targets	Kiapp: 0.16 nM (PP1), 0.4 nM (PP2A)[1].
ln Vitro	MTC cell growth is inhibited in a dose-dependent manner by Tautomycin (0-1000 nM, 48 hours)[2]. NE markers ASCL1 and CgA in human MTC cells are decreased in a dose-dependent manner by Tautomycin (0-1000 nM, 48 hours)[2]. Cell Proliferation Assay[2] Cell Line: Human MTC cells Concentration: 0-1000 nM Incubation Time: 48 hours Result: Inhibited MTC cell growth in a dose-dependent manner. Western Blot Analysis[2] Cell Line: Human MTC cells Concentration: 0-1000 nM Incubation Time: 48 hours Result: Led to a dose-dependent decrease in the NE markers ASCL1 and CgA.
References	:Mol Cancer Ther. 2009 Apr;8(4):914-20.
Additional Infomation	[(3R,4S,5R,8S,9S,12R)-12-[(2S,3S,6R,8S,9R)-3,9-dimethyl-8-[(3S)-3-methyl-4-oxopentyl]-1,7-dioxaspiro[5.5]undecan-2-yl]-5,9-dihydroxy-4-methoxy-2,8-dimethyl-7-oxotridecan-3-yl] (3R)-3-hydroxy-3-(4-methyl-2,5-dioxofuran-3-yl)propanoate has been reported in Streptomyces spiroverticillatus with data available.

Solubility Data

Solubility (In Vitro)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	1.3038 mL	6.5192 mL	13.0385 mL
	5 mM	0.2608 mL	1.3038 mL	2.6077 mL
	10 mM	0.1304 mL	0.6519 mL	1.3038 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.