401002

Iberiotoxin, Buthus tamulus, Recombinant, E. coli

• Sinonimo/i: Iberiotoxin, Buthus tamulus, Recombinant, E. coli, rlbTx, Pyr-FTDVDCSVSKECWSVCKDLFGVDRGKCMGKKCRCYQ
• Numero CAS: 129203-60-7
• Numero MDL: MFCD00131365
• Codice UNSPSC: 12352200
• NACRES: NA.77

Proprietà

• Saggio: ≥98% (HPLC)
• Livello qualitativo: 100
• Forma fisica: lyophilized solid (Salt-free)
• Produttore/marchio commerciale: Calbiochem^®
• Condizioni di stoccaggio: OK to freeze
• Condizioni di spedizione: ambient
• Temperatura di conservazione: −20°C
• InChI: 1S/C179H274N50O55S7/c1-87(2)65-111-155(261)208-112(66-93-33-15-13-16-34-93)146(252)195-77-133(239)225-139(88(3)4)172(278)213-117(71-136(244)245)158(264)199-100(44-31-62-190-178(186)187)144(250)193-75-131(237)198-102(40-22-27-58-181)148(254)219-124(167(273)205-109(56-64-285-12)145(251)194-76-132(238)197-101(39-21-26-57-180)147(253)200-105(43-25-30-61-184)151(257)220-123-81-286-288-83-125(221-152(258)106(203-166(123)272)45-32-63-191-179(188)189)169(275)210-113(68-95-46-48-97(234)49-47-95)156(262)206-110(177(283)284)50-53-129(185)235)82-287-291-86-128(168(274)202-104(42-24-29-60-183)150(256)212-116(70-135(242)243)159(265)207-111)224-175(281)142(91(9)10)228-164(270)121(79-231)216-157(263)115(69-96-74-192-99-38-20-19-37-98(96)99)211-170(276)126-84-289-290-85-127(171(277)217-122(80-232)165(271)227-141(90(7)8)174(280)218-120(78-230)163(269)201-103(41-23-28-59-182)149(255)204-108(154(260)222-126)52-55-134(240)241)223-160(266)118(72-137(246)247)214-173(279)140(89(5)6)226-162(268)119(73-138(248)249)215-176(282)143(92(11)233)229-161(267)114(67-94-35-17-14-18-36-94)209-153(259)107-51-54-130(236)196-107/h13-20,33-38,46-49,74,87-92,100-128,139-143,192,230-234H,21-32,39-45,50-73,75-86,180-184H2,1-12H3,(H2,185,235)(H,193,250)(H,194,251)(H,195,252)(H,196,236)(H,197,238)(H,198,237)(H,199,264)(H,200,253)(H,201,269)(H,202,274)(H,203,272)(H,204,255)(H,205,273)(H,206,262)(H,207,265)(H,208,261)(H,209,259)(H,210,275)(H,211,276)(H,212,256)(H,213,278)(H,214,279)(H,215,282)(H,216,263)(H,217,277)(H,218,280)(H,219,254)(H,220,257)(H,221,258)(H,222,260)(H,223,266)(H,224,281)(H,225,239)(H,226,268)(H,227,271)(H,228,270)(H,229,267)(H,240,241)(H,242,243)(H,244,245)(H,246,247)(H,248,249)(H,283,284)(H4,186,187,190)(H4,188,189,191); VDNVVLOBNHIMQA-UHFFFAOYSA-N

Descrizione

Descrizione generale

Recombinant Buthus tamulus iberiotoxin expressed in E. coli. A single polypeptide chain of 37 amino acids that displays about 68% sequence homology with charybdotoxin (ChTx). Acts as a selective, reversible blocker of high conductance, Ca²⁺-activated K⁺ channels (PK,Ca). rIbTx does not block other types of voltage-dependent ion channels, especially other types of K⁺ channels that are sensitive to inhibition by ChTx. Shown to block PK,Ca in excised membrane patches from bovine aortic smooth muscle, acting exclusively at the outer face of the channel (IC₅₀ = 250 pM). Causes a decrease in probability of channel opening and the channel open mean time. rIbTx appears to modulate ChTx binding by an allosteric mechanism.

Recombinant Buthus tamulus iberiotoxin expressed in E. coli. Acts as a selective, reversible blocker of high conductance Ca²⁺-activated K⁺ channels (IC₅₀ = 250 pM).

Azioni biochim/fisiol

Cell permeable: no

Primary Target
High conductance Ca2+-activated K+ channels

Product does not compete with ATP.

Reversible: yes

Target IC₅₀: 250 pM against high conductance Ca2+-activated K+ channels

potently inhibits Ca²⁺-activated K⁺ channels expressed in Xenopus oocytes

Attenzione

Toxicity: Harmful (C)

Sequenza

Pyr-Phe-Thr-Asp-Val-Asp-Cys⁷-Ser-Val-Ser-Lys-Glu-Cys¹³-Trp-Ser-Val-Cys¹⁷-Lys-Asp-Leu-Phe-Gly-Val-Asp-Arg-Gly-Lys-Cys²⁸-Met-Gly-Lys-Lys-Cys³³-Arg-Cys³⁵-Tyr-Gln-OH (disulfide bonds: 7 →28; 13 → 35; 17 → 33)

Ricostituzione

Following reconstitution, aliquot and freeze (-20°C) for long-term storage or refrigerate (4°C) for short-term storage. Stock solutions are stable for up to 3 months at -20°C or up to 2 weeks at 4°C.

Reconstitute in Tris-buffered saline (100 mM NaCl, 10 mM Tris-HCl, pH 7.5) containing 0.1% BSA.

Altre note

Vanelli, G., et al. 1994. J. Appl. Physiol.76, 1098.
Garcia, M.L., et al. 1991. J. Bioeng. Biomembr.23, 615.
Galvez, A., et al. 1990. J. Biol. Chem. 265, 11083.

Note legali

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Informazioni sulla sicurezza

• Pittogrammi: GHS06
• Avvertenze: Danger
• Indicazioni di pericolo: H300 + H310 + H330
• Consigli di prudenza: P260 - P262 - P264 - P280 - P302 + P352 + P310 - P304 + P340 + P310
• Classi di pericolo: Acute Tox. 1 Inhalation - Acute Tox. 2 Dermal - Acute Tox. 2 Oral
• Codice della classe di stoccaggio: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• Classe di pericolosità dell'acqua (WGK): WGK 3