Huwentoxin XVI

Huwentoxin-XVI, a 39 amino acids peptide, is potent and selective N-type Ca2+ channel blocker (IC50 ~ 60 nM). It can selectively and reversibly block N-type Ca2+ channels, but it does not block T-type Ca2+ channels, K+ channels or Na+ channels. It shows analgesic effects in vivo.

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CAT#	R1055
CAS	1600543-88-1
Background	HWTX-XVI, a 39-residue polypeptide with three disulfide bonds, was purified and characterized from Chinese tarantula venom. HWTX-XVI could block the twitch response of rat vas deferens to low-frequency electrical stimulation. HWTX-XVI selectively inhibited N-type calcium channels in DRG neurons but had no effect on other channels. >> Read More
M.F/Formula	C196H292N50O56S6
M.W/Mr.	4437.13
Sequence	CIGEGVPCDENDPRCCSGLVCLKPTLHGIWYKSYYCYKK(Disulfide bridge: Cys1- and Cys6,Cys8 and Cys21,Cys15 and Cys36)
Labeling Target	Calcium Channel
Appearance	White lyophilised solid
Purity	>98%
Activity	Blocker

CAT#	Product Name	M.W	Molecular Formula	Inquiry
R0933	st-Ht31 P	2766.19	C127H209N29O39	Inquiry
R0937	NFAT inhibitor, Cell Permeable	3573.15	C147H259N67O36S	Inquiry
R0951	Ac-Ala-Asn-Trp-AMC (Ac-ANW-AMC)	588.6	C30H32N6O7	Inquiry
R1025	Z-Leu-Leu-Glu-AMC	664.76	C₃₅H₄₄N₄O₉	Inquiry
R1026	Z-Leu-Arg-Gly-Gly-AMC	692.77	C₃₄H₄₄N₈O₈	Inquiry

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Source#	Synthetic
Storage	-20°C
InChI	InChI=1S/C196H292N50O56S6/c1-16-102(13)158-188(294)211-85-148(255)213-121(58-60-152(259)260)162(268)208-86-150(257)239-157(101(11)12)194(300)246-69-31-40-145(246)186(292)237-142-94-307-308-95-143-182(288)221-126(71-98(5)6)169(275)219-123(36-22-26-64-199)192(298)244-67-30-41-146(244)187(293)243-160(104(15)249)191(297)229-127(72-99(7)8)170(276)226-133(78-110-83-205-96-212-110)163(269)209-87-151(258)240-159(103(14)17-2)190(296)230-132(77-109-82-207-117-33-19-18-32-115(109)117)175(281)223-128(73-105-42-50-111(250)51-43-105)171(277)216-119(35-21-25-63-198)166(272)233-138(89-248)179(285)224-130(75-107-46-54-113(252)55-47-107)173(279)222-131(76-108-48-56-114(253)57-49-108)174(280)235-139(180(286)225-129(74-106-44-52-112(251)53-45-106)172(278)215-118(34-20-24-62-197)165(271)220-124(195(301)302)37-23-27-65-200)92-305-306-93-141(184(290)236-140(91-304-303-90-116(201)161(267)242-158)183(289)232-137(88-247)164(270)210-84-149(256)214-125(70-97(3)4)178(284)241-156(100(9)10)189(295)238-143)234-167(273)120(38-28-66-206-196(203)204)218-185(291)144-39-29-68-245(144)193(299)136(81-155(265)266)231-176(282)134(79-147(202)254)227-168(274)122(59-61-153(261)262)217-177(283)135(80-154(263)264)228-181(142)287/h18-19,32-33,42-57,82-83,96-104,116,118-146,156-160,207,247-253H,16-17,20-31,34-41,58-81,84-95,197-201H2,1-15H3,(H2,202,254)(H,205,212)(H,208,268)(H,209,269)(H,210,270)(H,211,294)(H,213,255)(H,214,256)(H,215,278)(H,216,277)(H,217,283)(H,218,291)(H,219,275)(H,220,271)(H,221,288)(H,222,279)(H,223,281)(H,224,285)(H,225,286)(H,226,276)(H,227,274)(H,228,287)(H,229,297)(H,230,296)(H,231,282)(H,232,289)(H,233,272)(H,234,273)(H,235,280)(H,236,290)(H,237,292)(H,238,295)(H,239,257)(H,240,258)(H,241,284)(H,242,267)(H,243,293)(H,259,260)(H,261,262)(H,263,264)(H,265,266)(H,301,302)(H4,203,204,206)
InChI Key	JEUFUDFTZMBKGH-UHFFFAOYSA-N
References	In this study, a novel neurotoxin named Huwentoxin-XVI (HWTX-XVI) specific for N-type calcium channels was purified and characterized from the venom of Chinese tarantula Ornithoctonus huwena. HWTX-XVI is composed of 39 amino acid residues including six cysteines that constitute three disulfide bridges. HWTX-XVI could almost completely block the twitch response of rat vas deferens to low-frequency electrical stimulation. Huwentoxin-XVI, an analgesic, highly reversible mammalian N-type calcium channel antagonist from Chinese tarantula Ornithoctonus huwena