A conotoxin and an antagonist of α3β4 subunit-containing nAChRs
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α-Conotoxin AuIB (trifluoroacetate salt)

Item No. 33795

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
cyclic (2→8), (3→15)-bis(disulfide), glycyl-L-cysteinyl-L-cysteinyl-L-seryl-L-tyrosyl-L-prolyl-L-prolyl-L-cysteinyl-L-phenylalanyl-L-alanyl-L-threonyl-L-asparaginyl-L-prolyl-L-α-aspartyl-L-cysteinamide, trifluoroacetate salt
Synonyms
  • GCCSYPPCFATNPDC
Molecular Formula
C65H89N17O21S4 • XCF3COOH
Formula Weight
1572.8
Purity
≥95%
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
Water: 5 mg/ml
SMILES
O=C1[C@@]2([H])N(CCC2)C([C@@H](NC([C@@H](NC([C@@]3([H])NC([C@H](CSSC[C@@H](C(N[C@H](C(N[C@H](C(N[C@@](C(N[C@H](C(N4[C@](CCC4)([H])C(N[C@H](C(N[C@@H](CSSC3)C(N)=O)=O)CC(O)=O)=O)=O)CC(N)=O)=O)([H])[C@H](O)C)=O)C)=O)CC5=CC=CC=C5)=O)NC([C@@]6([H])N1CCC6)=O)NC(CN)=O)=O)=O)CO)=O)CC7=CC=C(C=C7)O)=O.OC(C(F)(F)F)=O
InChi Code
InChI=1S/C65H89N17O21S4.C2HF3O2/c1-31-53(91)79-51(32(2)84)62(100)74-39(23-48(67)86)64(102)80-18-6-11-45(80)60(98)72-37(24-50(88)89)55(93)76-41(52(68)90)27-104-106-29-43-59(97)75-40(26-83)56(94)73-38(22-34-14-16-35(85)17-15-34)63(101)82-20-8-13-47(82)65(103)81-19-7-12-46(81)61(99)78-44(30-107-105-28-42(57(95)77-43)70-49(87)25-66)58(96)71-36(54(92)69-31)21-33-9-4-3-5-10-33;3-2(4,5)1(6)7/h3-5,9-10,14-17,31-32,36-47,51,83-85H,6-8,11-13,18-30,66H2,1-2H3,(H2,67,86)(H2,68,90)(H,69,92)(H,70,87)(H,71,96)(H,72,98)(H,73,94)(H,74,100)(H,75,97)(H,76,93)(H,77,95)(H,78,99)(H,79,91)(H,88,89);(H,6,7)/t31-,32+,36-,37-,38-,39-,40-,41-,42-,43-,44-,45-,46-,47-,51-;/m0./s1
InChi Key
PHHCMNCPUIOVFH-UWWWOWFQSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    Product Description

    α-Conotoxin AuIB is a conotoxin that has been found in C. aulicus and has receptor antagonist and analgesic activity.1 It is a peptide antagonist of α3β4 subunit-containing nicotinic acetylcholine receptors (nAChRs; IC50 = 0.75 µM). It is greater than 100-fold selective for α3β4 subunit-containing nAChRs over those containing α2β2, α2β4, α3β2, α4β2, α4β4, or α1β1γδ subunits but does inhibit homomeric α7 nAChRs by 34% at 3 µM. Intrathecal administration of α-conotoxin AuIB (0.2 and 2 nmol/animal) reduces mechanical allodynia in a rat model of neuropathic pain induced by partial sciatic nerve ligation.2 It also reverses somatic signs of withdrawal in a mouse model of morphine withdrawal when administered intracerebroventricularly at doses of 1.75 and 3.5 pmol/animal.3

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Luo, S., Kulak, J.M., Cartier, G.E., et al. α-Conotoxin AuIB selectively blocks α3 β4 nicotinic acetylcholine receptors and nicotine-evoked norepinephrine release. J. Neurosci. 18(21), 8571-8579 (1998).

    2. Napier, I.A., Klimis, H., Rycroft, B.K., et al. Intrathecal α-conotoxins Vc1.1, AuIB and MII acting on distinct nicotinic receptor subtypes reverse signs of neuropathic pain. Neuropharmacology 62(7), 2202-2207 (2012).

    3. Muldoon, P.P., Jackson, K.J., Perez, E., et al. The α3β4* nicotinic ACh receptor subtype mediates physical dependence to morphine: mouse and human studies. Br. J. Pharmacol. 171(16), 3845-3857 (2014).