172450-46-3
Chemical Structure
ShK toxin
Synonym(s): Stichodactyla helianthus neurotoxin
- CAS No.: 172450-46-3
- Formula:C169H274N54O48S7
- Molecular Weight:4054.80
SMILES: O=C(N[C@@H](CO)C(N[C@@H](CSSC[C@@H](C(O)=O)NC1=O)C(N[C@@H]([C@@H](C)CC)C(N[C@@H](CC(O)=O)C(N[C@@H]([C@H](O)C)C(N[C@@H]([C@@H](C)CC)C(N2[C@@H](CCC2)C(N[C@@H](CCCCN)C(N[C@@H](CO)C(N[C@@H](CCCNC(N)=N)C(N[C@@H](CSSC[C@@H](C(N[C@@H](CCCNC(N)=N)C(N[C@@H](CCCCN)C(N[C@H]3[C@H](O)C)=O)=O)=O)NC4=O)C(N[C@@H]([C@H](O)C)C(N[C@@H](C)C(N[C@@H](CC5=CC=CC=C5)C(N[C@@H](CCC(N)=O)C(N[C@@H](CSSC[C@@H](C(NCC(N[C@H]1[C@H](O)C)=O)=O)NC3=O)C(N[C@@H](CCCCN)C(N[C@@H](CC6=CNC=N6)C(N[C@@H](CO)C(N[C@@H](CCSC)C(N[C@@H](CCCCN)C(N[C@@H](CC7=CC=C(C=C7)O)C(N[C@@H](CCCNC(N)=N)C(N[C@@H](CC(C)C)C(N[C@@H](CO)C(N[C@H]4CC8=CC=CC=C8)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)[C@H](CCCNC(N)=N)N
Biological Activity: ShK toxin blocks voltage-dependent potassium channel (Kv1.3 channel). ShK toxin can be isolated from the whole body extract of the Caribbean sea anemone (Stichodactylu helianthus). ShK toxin competes with dendrotoxin I and α-dendrotoxin for binding to synaptosomal membranes of rat brain, facilitates acetylcholine release. ShK toxin suppresses K+ currents in cultured rat dorsal root ganglion neurons. ShK toxin also inhibits T lymphocyte proliferation[1][2].
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ShK toxin | ShK toxin blocks voltage-dependent potassium channel (Kv1.3 channel). ShK toxin can be isolated from the whole body extract of the Caribbean sea anemone (Stichodactylu helianthus). ShK toxin competes with dendrotoxin I and α-dendrotoxin for binding to synaptosomal membranes of rat brain, facilitates acetylcholine release. ShK toxin suppresses K+ currents in cultured rat dorsal root ganglion neurons. ShK toxin also inhibits T lymphocyte proliferation. | |||||||||||||||||||||
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References
- [1]. Castañeda O, et al. Characterization of a potassium channel toxin from the Caribbean Sea anemone Stichodactyla helianthus. Toxicon. 1995 May;33(5):603-13. [Content Brief]
- [2]. Beeton C, et al. The D-diastereomer of ShK toxin selectively blocks voltage-gated K+ channels and inhibits T lymphocyte proliferation. J Biol Chem. 2008 Jan 11;283(2):988-97. [Content Brief]
