Blocker of A-type potassium channels(A型鉀離子通道阻斷劑)
AmmTx3 has been originally isolated from the venom of the scorpion Androctonus mauretanicus and is now offered bySmartox in its synthetic version. binds on its target A-type potassium channel with an affinity of 66 pM in rat brain synaptosomes (Kv4 channels). As such, should represent an excellent tool to study action potential firing frequency, spike initiation and waveform in excitable cells. was indeed found to block A-type potassium currents from cerebellum granular cells and from striatum neurons but with IC50 values of 130 nM. appears to be a pore blocker of Kv4.2 and Kv4.3 and seems to require the expression of the Kv4 associated protein DPP6. It should also contribute to our understanding of learning, memory and behavior. shares very high sequence homology with two other A-type potassium channel blockers, Aa1 from Androctonus australis (94%) and BmTx3 from Buthus martensi (91%), and according to binding experiments the same channel target as well. is a member of the a-KTX 15 family of toxins and consist of a single chain of 37 amino acid residues, with an N-terminal pyroglutamate, cross-linked by three disulfide bridges.
二硫鍵：Cys8-Cys28, Cys13-Cys33 and Cys17-Cys35
長度 (aa)： 37
外觀：white lyophilized solid
可溶性：water or saline buffer
CAS 號：not available
5 x 0.01mg