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cAMPS-Sp, triethylammonium salt

Cell-permeable cAMP analog; activates PKA CAS# 93602-66-5

cAMPS-Sp, triethylammonium salt

2D Structure

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cAMPS-Sp, triethylammonium salt

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Chemical Properties of cAMPS-Sp, triethylammonium salt

Cas No. 93602-66-5 SDF Download SDF
PubChem ID 57369926 Appearance Powder
Formula C16H27N6O5PS M.Wt 446.46
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 100 mM in water
Chemical Name 6-(6-aminopurin-9-yl)-2-oxido-2-sulfanylidene-4a,6,7,7a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol;triethylazanium
SMILES CC[NH+](CC)CC.C1C2C(C(C(O2)N3C=NC4=C3N=CN=C4N)O)OP(=S)(O1)[O-]
Standard InChIKey OXIPZMKSNMRTIV-UHFFFAOYSA-N
Standard InChI InChI=1S/C10H12N5O5PS.C6H15N/c11-8-5-9(13-2-12-8)15(3-14-5)10-6(16)7-4(19-10)1-18-21(17,22)20-7;1-4-7(5-2)6-3/h2-4,6-7,10,16H,1H2,(H,17,22)(H2,11,12,13);4-6H2,1-3H3
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of cAMPS-Sp, triethylammonium salt

DescriptionCell-permeable cAMP analog that activates cAMP receptor proteins such as PKA and cAMP-regulated guanine nucleotide exchange factor. Enantiomer cAMPS-Rp, triethylammonium salt also available.

cAMPS-Sp, triethylammonium salt Dilution Calculator

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cAMPS-Sp, triethylammonium salt Molarity Calculator

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Preparing Stock Solutions of cAMPS-Sp, triethylammonium salt

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.2398 mL 11.1992 mL 22.3984 mL 44.7968 mL 55.9961 mL
5 mM 0.448 mL 2.2398 mL 4.4797 mL 8.9594 mL 11.1992 mL
10 mM 0.224 mL 1.1199 mL 2.2398 mL 4.4797 mL 5.5996 mL
50 mM 0.0448 mL 0.224 mL 0.448 mL 0.8959 mL 1.1199 mL
100 mM 0.0224 mL 0.112 mL 0.224 mL 0.448 mL 0.56 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on cAMPS-Sp, triethylammonium salt

The P2Y12 antagonists, 2-methylthioadenosine 5'-monophosphate triethylammonium salt and cangrelor (ARC69931MX), can inhibit human platelet aggregation through a Gi-independent increase in cAMP levels.[Pubmed:19346255]

J Biol Chem. 2009 Jun 12;284(24):16108-17.

ADP plays an integral role in the process of hemostasis by signaling through two platelet G-protein-coupled receptors, P2Y1 and P2Y12. The recent use of antagonists against these two receptors has contributed a substantial body of data characterizing the ADP signaling pathways in human platelets. Specifically, the results have indicated that although P2Y1 receptors are involved in the initiation of platelet aggregation, P2Y12 receptor activation appears to account for the bulk of the ADP-mediated effects. Based on this consideration, emphasis has been placed on the development of a new class of P2Y12 antagonists (separate from clopidogrel and ticlopidine) as an approach to the treatment of thromboembolic disorders. The present work examined the molecular mechanisms by which two of these widely used adenosine-based P2Y12 antagonists (2-methylthioadenosine 5'-monophosphate triethylammonium salt (2MeSAMP) and ARC69931MX), inhibit human platelet activation. It was found that both of these compounds raise platelet cAMP to levels that substantially inhibit platelet aggregation. Furthermore, the results demonstrated that this elevation of cAMP did not require Gi signaling or functional P2Y12 receptors but was mediated through activation of a separate G protein-coupled pathway, presumably involving Gs. However, additional experiments revealed that neither 2MeSAMP nor ARC69931MX (cangrelor) increased cAMP through activation of A2a, IP, DP, or EP2 receptors, which are known to couple to Gs. Collectively, these findings indicate that 2MeSAMP and ARC69931MX interact with an unidentified platelet G protein-coupled receptor that stimulates cAMP-mediated inhibition of platelet function. This inhibition is in addition to that derived from antagonism of P2Y12 receptors.

Detecting proton flux across chromatophores driven by F0F1-ATPase using N-(fluorescein-5-thiocarbamoyl)-1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolami ne, triethylammonium salt.[Pubmed:16043113]

Anal Biochem. 2005 Sep 1;344(1):102-7.

N-(Fluorescein-5-thiocarbamoyl)-1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolami ne, triethylammonium salt (F-DHPE) is a lipid fluorescence dye sensitive to pH changes and is used in this study for detecting proton flux through F0F1-ATPase within chromatophores driven by ATP hydrolysis. F-DHPE is easily labeled to the outer surface of chromatophores. In the range of pH 7.0 to 9.0, fluorescence intensity is sensitive to pH changes. The sensitivity is especially great in the range of pH 8.2 to 9.0, so pH 8.6 was chosen as the appropriate experimental condition. It is shown that added ATP not only acts as a fluorescence quencher but also can be hydrolyzed by F0F1-ATPase to pump protons into chromatophores, resulting in fluorescence restoration. A stimulator (NaSO3) and various types of inhibitors (NaN3, 5'-adenylyl imidodiphosphate [AMP-PNP], and N,N'-dicyclohexylcarbodiimide [DCCD]) of F0F1 confirmed that fluorescence restoration is caused by ATP-driven proton flux. When loaded with one antibody (anti-beta antibody) or two antibodies (anti-beta antibody and sheep to rabbit second antibody), F0F1-ATPase exhibits lower proton pumping activities, as indicated by fluorescence restoration. The possible mechanism of the inhibition of antibodies on proton pumping activity is discussed.

Synthesis of gemcitabine triphosphate (dFdCTP) as a tris(triethylammonium) salt.[Pubmed:18396042]

Bioorg Med Chem Lett. 2008 May 1;18(9):2957-8.

First synthesis of gemcitabine triphosphate (dFdCTP) as a tris(triethylammonium) salt is reported.

Receptor-independent effects of 2'(3')-O-(4-benzoylbenzoyl)ATP triethylammonium salt on cytosolic pH.[Pubmed:23689980]

Purinergic Signal. 2013 Dec;9(4):687-93.

The effect of the relatively potent P2X7 receptor agonist 2'(3')-O-(4-benzoylbenzoyl)adenosine 5'-triphosphate triethylammonium salt (BzATP-TEA) on cytosolic pH (pHi) was studied using MC3T3-E1 osteoblast-like cells, which endogenously express P2X7 receptors. pHi was measured fluorimetrically using the pH-sensitive dye 2',7'-bis(2-carboxyethyl)-5(6)-carboxyfluorescein. BzATP-TEA (0.3-1.5 mM) elicited fast-onset alkalinization responses. In contrast, adenosine 5'-triphosphate disodium salt (5 mM) failed to reproduce the BzATP-TEA-induced responses, indicating a P2 receptor-independent mechanism. We speculated that triethylamine, which is present in solutions of BzATP-TEA, permeates the plasma membrane, and is protonated intracellularly, leading to an increase in pHi. Consistent with this hypothesis, triethylammonium (TEA) chloride mimicked the effects of BzATP-TEA on pHi. Moreover, measurements using a Cytosensor microphysiometer revealed that TEA chloride transiently suppressed proton efflux from cells, whereas washout of TEA transiently enhanced proton efflux. BzATP-TEA also elicited a sustained increase in proton efflux that was blocked specifically by the P2X7 antagonist A-438079. Taken together, we conclude that BzATP-TEA-induced alkalinization is unrelated to P2X7 activation, but is due to the presence of TEA. This effect may confound assessment of the outcomes of P2X7 activation by BzATP-TEA in other systems. Thus, control experiments using TEA chloride are recommended to distinguish between receptor-mediated and nonspecific effects of this widely used agonist. We performed such a control and confirmed that BzATP-TEA, but not TEA chloride, caused the elevation of cytosolic free Ca(2+) in MC3T3-E1 cells, ruling out the possibility that receptor-independent effects on pHi underlie BzATP-TEA-induced Ca(2+) signaling.

Ethanol inhibition of NMDA-induced responses and acute tolerance to the inhibition in rat rostral ventrolateral medulla in vivo: Involvement of cAMP-dependent protein kinases.[Pubmed:16806304]

Neuropharmacology. 2006 Sep;51(4):747-55.

Our recent study showed that intravenous ethanol selectively inhibited the pressor effects elicited by the microinjection of N-methyl-D-aspartate (NMDA) into rostral ventrolateral medulla (RVLM) and acute tolerance to the inhibition was observed during prolonged application of ethanol in anesthetized Sprague-Dawley rats. In this study, we examined the role of the cAMP-dependent protein kinase (PKA) signaling pathway in acute tolerance to ethanol inhibition of NMDA-induced responses in rat RVLM. A significant increase in the level of PKA-regulated phosphoserine 897 on the NMDA NR1 subunit was found in the rostroventral medulla during acute ethanol tolerance. Reduction of NMDA-induced pressor effects was observed at 10 min but disappeared at 40 min after continuous ethanol infusion. This effect was dose-dependently blocked by microinjection of KT5720 (0.04-4 pmol, a selective PKA inhibitor) or cAMPS-Rp (0.02, 0.2 pmol, a cAMP antagonist) into the RVLM 10 min post-injection of ethanol; KT 5720 or cAMPS-Rp alone at doses tested had no significant effects on NMDA-induced responses. Post-treatment with cAMPS-Sp (10 pmol, a cAMP activator) did not affect acute ethanol tolerance. Interestingly, administration of KT 5720 (0.4, 4 pmol) or cAMPS-Rp (2,10 pmol) into the RVLM 20 min before the injection of ethanol also reduced the inhibitory effects of ethanol on NMDA-induced pressor effects in a dose-dependent manner. Our results provide the first in vivo evidence that PKA signaling pathways participate in acute tolerance to ethanol inhibition of NMDA receptor function. Furthermore, PKA-mediated signaling pathways may also be involved in the interaction between ethanol and NMDA receptors.

A family of cAMP-binding proteins that directly activate Rap1.[Pubmed:9856955]

Science. 1998 Dec 18;282(5397):2275-9.

cAMP (3',5' cyclic adenosine monophosphate) is a second messenger that in eukaryotic cells induces physiological responses ranging from growth, differentiation, and gene expression to secretion and neurotransmission. Most of these effects have been attributed to the binding of cAMP to cAMP-dependent protein kinase A (PKA). Here, a family of cAMP-binding proteins that are differentially distributed in the mammalian brain and body organs and that exhibit both cAMP-binding and guanine nucleotide exchange factor (GEF) domains is reported. These cAMP-regulated GEFs (cAMP-GEFs) bind cAMP and selectively activate the Ras superfamily guanine nucleotide binding protein Rap1A in a cAMP-dependent but PKA-independent manner. Our findings suggest the need to reformulate concepts of cAMP-mediated signaling to include direct coupling to Ras superfamily signaling.

Probing the cyclic nucleotide binding sites of cAMP-dependent protein kinases I and II with analogs of adenosine 3',5'-cyclic phosphorothioates.[Pubmed:2162349]

J Biol Chem. 1990 Jun 25;265(18):10484-91.

A set of cAMP analogs were synthesized that combined exocyclic sulfur substitutions in the equatorial (Rp) or the axial (Sp) position of the cyclophosphate ring with modifications in the adenine base of cAMP. The potency of these compounds to inhibit the binding of [3H]cAMP to sites A and B from type I (rabbit skeletal muscle) and type II (bovine myocardium) cAMP-dependent protein kinase was determined quantitatively. On the average, the Sp isomers had a 5-fold lower affinity for site A and a 30-fold lower affinity for site B of isozyme I than their cyclophosphate homolog. The mean reduction in affinities for the equivalent sites of isozyme II were 20- and 4-fold, respectively. The Rp isomers showed a decrease in affinity of approximately 400-fold and 200-fold for site A and B, respectively, of isozyme I, against 200-fold and 45-fold for site A and B of isozyme II. The Sp substitutions therefore increased the relative preference for site A of isozyme I and site B of isozyme II. The Rp substitution, on the other hand, increased the relative preference for site B of both isozymes. These data show that the Rp and Sp substitutions are tolerated differently by the two intrachain sites of isozymes I and II. They also support the hypothesis that it is the axial, and not the previously proposed equatorial oxygen that contributes the negative charge for the ionic interaction with an invariant arginine in all four binding sites. In addition, they demonstrate that combined modifications in the adenine ring and the cyclic phosphate ring of cAMP can enhance the ability to discriminate between site A and B of one isozyme as well as to discriminate between isozyme I and II. Since Rp analogs of cAMP are known to inhibit activation of cAMP-dependent protein kinases, the findings of the present study have implications for the synthesis of analogs having a very high selectivity for isozyme I or II.

A kinetic study of interactions of (Rp)- and (Sp)-adenosine cyclic 3',5'-phosphorothioates with type II bovine cardiac muscle adenosine cyclic 3',5'-phosphate dependent protein kinase.[Pubmed:6289880]

Biochemistry. 1982 Aug 31;21(18):4371-6.

The stereoselectivity of the adenosine cyclic 3',5'-phosphate (cAMP) binding sites on the regulatory subunit of the type II bovine cardiac muscle cAMP-dependent protein kinase was investigated by examining the interactions of (Rp)- and (Sp)-adenosine cyclic 3',5'-phosphorothioates (cAMPS) with these sites. While activation of the holoenzyme and binding to the regulatory subunit of the type II kinase were observed for both of these diastereomers, there were significant differences between the interactions of the cAMPS isomers with the enzyme. In particular, the Sp isomer is more potent than the Rp species not only in the activation of reconstituted, as well as directly isolated, holoenzyme but also in the inhibition of [3H]cAMP binding to the regulatory subunit. A marked preference for the binding of the Sp isomer to site 2 in the regulatory subunit exists. Hydrogen bonding of a functional group on the regulatory subunit with preferential orientation toward the exocyclic oxygen rather than the sulfur of the thiophosphoryl residue may be involved in the observed selectivity of cAMPS binding and activation. In addition to our findings on the stereoselectivity of the binding of cAMPS to cAMP-dependent protein kinase, we have established a method for the reconstitution of holoenzyme from the purified subunits without subjecting the regulatory protein to denaturing conditions.

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