Sigma-Aldrich Snx-482

Assay

≥98% (HPLC)

Quality Level

100

Form

solid

Potency

15-30 nM IC₅₀

Manufacturer/Tradename

Calbiochem^®

Storage Condition

OK to freeze
protect from light

Color

white

Storage Temp.

−20°C

Inchi

1S/C192H274N52O60S7/c1-91(2)57-114-157(270)207-79-146(257)213-135-85-306-307-86-136-183(296)237-133(83-248)179(292)242-153(95(9)10)187(300)231-124(67-141(195)252)170(283)228-126(69-148(260)261)173(286)229-127(70-149(262)263)174(287)239-138(184(297)240-139(189(302)244-55-30-42-140(244)185(298)217-112(161(274)219-114)41-29-54-202-192(198)199)89-311-308-84-134(212-145(256)78-205-155(268)96(11)209-159(272)110(39-26-27-52-193)214-171(284)128(71-150(264)265)232-186(299)152(94(7)8)241-142(253)73-194)181(294)215-111(40-28-53-201-191(196)197)160(273)223-119(63-102-43-47-106(250)48-44-102)164(277)216-113(51-56-305-14)162(275)222-117(60-99-31-18-15-19-32-99)158(271)206-76-143(254)204-77-144(255)211-136)88-310-309-87-137(238-167(280)120(64-103-45-49-107(251)50-46-103)225-177(290)131(81-246)234-165(278)118(61-100-33-20-16-21-34-100)224-163(276)115(58-92(3)4)221-176(289)130(80-245)236-169(282)123(226-182(135)295)66-105-75-200-90-208-105)180(293)210-97(12)156(269)218-122(65-104-74-203-109-38-25-24-37-108(104)109)168(281)227-125(68-147(258)259)172(285)220-116(59-93(5)6)175(288)243-154(98(13)249)188(301)230-121(62-101-35-22-17-23-36-101)166(279)235-132(82-247)178(291)233-129(190(303)304)72-151(266)267/h15-25,31-38,43-50,74-75,90-98,110-140,152-154,203,245-251H,26-30,39-42,51-73,76-89,193-194H2,1-14H3,(H2,195,252)(H,200,208)(H,204,254)(H,205,268)(H,206,271)(H,207,270)(H,209,272)(H,210,293)(H,211,255)(H,212,256)(H,213,257)(H,214,284)(H,215,294)(H,216,277)(H,217,298)(H,218,269)(H,219,274)(H,220,285)(H,221,289)(H,222,275)(H,223,273)(H,224,276)(H,225,290)(H,226,295)(H,227,281)(H,228,283)(H,229,286)(H,230,301)(H,231,300)(H,232,299)(H,233,291)(H,234,278)(H,235,279)(H,236,282)(H,237,296)(H,238,280)(H,239,287)(H,240,297)(H,241,253)(H,242,292)(H,243,288)(H,258,259)(H,260,261)(H,262,263)(H,264,265)(H,266,267)(H,303,304)(H4,196,197,201)(H4,198,199,202)

Inchi Key

NSUPRLHDCFNOKD-UHFFFAOYSA-N

General Description

A peptidyl toxin present in the venom of African tarantula, Hysterocrates gigas that acts as a high affinity, reversible blocker of Ca_v2.3 (α1E, R-type) channels (IC₅₀= 15-30 nM). The inhibition appears to be voltage-dependent. At lower concentrations it is also shown to block native R-type Ca2+ current in rat neurohypophyseal nerve terminals, however, these effects are not observed at higher concentrations. Does not affect Na+ or K+ currents in several cultured cell types (~ 500 nM).

Biochem/Physiol Actions

Primary Target
Ca_v2.3 channels

Warning

Toxicity: Standard Handling (A)

Sequence

GVDKAGCRYMFGGCSVNDDCCPRLGCHSLF→SYCAWDLTFSD (difulfid bond: 7-21, 14-26, 20-33)

Reconstitution

Following reconstitution, aliquot and freeze(-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Abitbol, K. et Al. 2012.J. Physiol. 590,2977.
Newcomb, R., et Al., 1998.Biochemistry. 37,15353.CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany