Ryanodine

Ryanodine
Names

IUPAC name (1R,2R,3S,6S,7S,9S,10R,11S,12R,13S,14R)-2,6,9,11,13,14-Hexahydroxy-11-isopropyl-3,7,10-trimethyl-15-oxapentacyclo [7.5.1.0^1,6.0^7,13.0^10,14]pentadec-12-yl 1H-pyrrole-2-carboxylate
Identifiers
CAS Number	15662-33-6^Y
3D model (Jmol)	Interactive image
ChEBI	CHEBI:8925^Y
ChEMBL	ChEMBL612231^N
ChemSpider	16736002^Y
ECHA InfoCard	100.036.105
IUPHAR/BPS	4303
KEGG	C08705^N
MeSH	Ryanodine
PubChem	5114
InChI InChI=1S/C25H35NO9/c1-12(2)22(31)17(34-16(28)14-7-6-10-26-14)23(32)18(4)11-21(30)19(22,5)25(23,33)24(35-21)15(27)13(3)8-9-20(18,24)29/h6-7,10,12-13,15,17,26-27,29-33H,8-9,11H2,1-5H3/t13-,15+,17+,18-,19+,20-,21-,22+,23+,24+,25+/m0/s1^Y Key: JJSYXNQGLHBRRK-SFEDZAPPSA-N^Y InChI=1/C25H35NO9/c1-12(2)22(31)17(34-16(28)14-7-6-10-26-14)23(32)18(4)11-21(30)19(22,5)25(23,33)24(35-21)15(27)13(3)8-9-20(18,24)29/h6-7,10,12-13,15,17,26-27,29-33H,8-9,11H2,1-5H3/t13-,15+,17+,18-,19+,20-,21-,22+,23+,24+,25+/m0/s1 Key: JJSYXNQGLHBRRK-SFEDZAPPBA
SMILES C[C@H]1CC[C@@]2([C@@]3(C[C@]4([C@@]5([C@]([C@H]([C@@]3([C@]5([C@]2([C@@H]1O)O4)O)O)OC(=O)c6ccc[nH]6)(C(C)C)O)C)O)C)O
Properties
Chemical formula	C₂₅H₃₅NO₉
Molar mass	493.547 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N (what is ^YN ?)
Infobox references

Ryanodine is a poisonous diterpenoide found in the South American plant Ryania speciosa (Salicaceae). It was originally used as an insecticide.

The compound has extremely high affinity to the open-form ryanodine receptor, a group of calcium channels found in skeletal muscle, smooth muscle, and heart muscle cells. It binds with such high affinity to the receptor that it was used as a label for the first purification of that class of ion channels and gave its name to it.

At nanomolar concentrations, ryanodine locks the receptor in a half-open state, whereas it fully closes them at micromolar concentration. The effect of the nanomolar-level binding is that ryanodine causes release of calcium from calcium stores as the sarcoplasmic reticulum in the cytoplasm, leading to massive muscular contractions. The effect of micromolar-level binding is paralysis. This is true for both mammals and insects.

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Wikipedia