Guangxitoxin 1E

Guangxitoxin-1E is a specific inhibitor of the Kv current of β-cells, can enhance the glucose-dependent intracellular calcium elevations and increases the glucose-dependent insulin secretion. It is considered as a useful tool for the investigation of type 2 diabetes.

Designed for biological research and industrial applications, not intended for individual clinical or medical purposes.
Guangxitoxin 1E(CAS 1233152-82-3)

CAT No: R0935

CAS No:1233152-82-3

Synonyms/Alias:Guangxitoxin 1E;1233152-82-3;AKOS027470252;DA-63966;PD079860;

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cGMP Peptide
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M.F/Formula
C178H248N44O45S7
M.W/Mr.
3949
Sequence
One Letter Code:EGECGGFWWKCGSGKPACCPKYVCSPKWGLCNFPMP
Three Letter Code:H-DL-Glu-Gly-DL-Glu-DL-Cys(1)-Gly-Gly-DL-Phe-DL-Trp-DL-Trp-DL-Lys-DL-Cys(2)-Gly-DL-Ser-Gly-DL-Lys-DL-Pro-DL-Ala-DL-Cys(3)-DL-Cys(1)-DL-Pro-DL-Lys-DL-Tyr-DL-Val-DL-Cys(2)-DL-Ser-DL-Pro-DL-Lys-DL-Trp-Gly-DL-Leu-DL-Cys(3)-DL-Asn-DL-Phe-DL-Pro-DL-Met-DL-Pro-OH
Labeling Target
Kv2.1 / Kv2.2 channel
Appearance
White lyophilized solid
Purity
>98%
Activity
Inhibitor
Source#
Synthetic
Long-term Storage Conditions
Soluble in water
Solubility
-20 °C
InChI
InChI=1S/C178H248N44O45S7/c1-95(2)70-118-159(247)214-131(165(253)208-124(77-139(184)226)163(251)209-125(73-99-34-11-8-12-35-99)175(263)219-65-28-49-137(219)171(259)203-117(59-69-268-6)174(262)222-68-31-50-138(222)178(266)267)92-272-271-91-130-167(255)216-133-94-274-270-90-128(213-158(246)115(56-58-147(235)236)195-142(229)83-189-150(238)108(183)55-57-146(233)234)153(241)190-81-140(227)188-82-141(228)198-119(71-98-32-9-7-10-33-98)160(248)206-123(76-103-80-187-111-41-18-15-38-107(103)111)162(250)207-122(75-102-79-186-110-40-17-14-37-106(102)110)161(249)200-112(42-19-23-60-179)157(245)212-129(154(242)193-86-145(232)199-126(87-223)152(240)192-84-143(230)196-116(45-22-26-63-182)173(261)218-64-27-46-134(218)168(256)194-97(5)149(237)211-130)89-269-273-93-132(215-172(260)148(96(3)4)217-164(252)120(72-100-51-53-104(225)54-52-100)204-155(243)113(43-20-24-61-180)201-170(258)136-48-30-67-221(136)177(133)265)166(254)210-127(88-224)176(264)220-66-29-47-135(220)169(257)202-114(44-21-25-62-181)156(244)205-121(151(239)191-85-144(231)197-118)74-101-78-185-109-39-16-13-36-105(101)109/h7-18,32-41,51-54,78-80,95-97,108,112-138,148,185-187,223-225H,19-31,42-50,55-77,81-94,179-183H2,1-6H3,(H2,184,226)(H,188,227)(H,189,238)(H,190,241)(H,191,239)(H,192,240)(H,193,242)(H,194,256)(H,195,229)(H,196,230)(H,197,231)(H,198,228)(H,199,232)(H,200,249)(H,201,258)(H,202,257)(H,203,259)(H,204,243)(H,205,244)(H,206,248)(H,207,250)(H,208,253)(H,209,251)(H,210,254)(H,211,237)(H,212,245)(H,213,246)(H,214,247)(H,215,260)(H,216,255)(H,217,252)(H,233,234)(H,235,236)(H,266,267)
InChI Key
SZVUKNYCMKWHNH-UHFFFAOYSA-N
References

In addition to being more potent than hanatoxin or stromatoxin, this peptide, Guangxitoxin-1E (GxTX-1E) had higher specificity for Kv2 channels, inhibiting Kv4.3 channels with an 8-fold lower potency and without significant effect on Kv1 or Kv3 family channels. The high selectivity of GxTX-1E for Kv2 makes it an attractive tool for studying the function of Kv2 channels in various types of neurons.

Kv2 Channel Regulation of Action Potential Repolarization and Firing Patterns in Superior Cervical Ganglion Neurons and Hippocampal CA1 Pyramidal Neurons

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