The T0 domain of rabbit KV1.3 regulates steady state channel protein level.

The T0 domain of rabbit KV1.3 regulates steady state channel protein level.
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兔 KV1.3 的 T0 结构域调节稳态通道蛋白水平。

DOI:
10.1006/bbrc.1998.9801
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发表时间:
1999
期刊:
Biochemical and biophysical research communications.
影响因子:
--
通讯作者:
Desir,GV
Desir,GV
中科院分区:
--
文献类型:
--
作者:
Segal,AS;Yao,X;Desir,GV

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Shaker超家族编码电压门控钾(Kv)通道。氨基(N)末端对于通道组装是重要的并且介导快速失活。我们最近从兔肾中分离出Kv通道,表示为rabKv1.3(Yao等人,J.Clin.Invest.97,2525-2533,1996),并发现与野生型通道相比,缺失T1识别结构域(a.a42 -185)近端的区域(T0结构域,氨基酸3-39)导致Kv电流放大13倍(Yao等人,BBRC249,492-498)。在这里,我们表明,删除T0域既不影响单通道电导,也不影响通道开放概率。相反,它增加了膜中存在的通道蛋白的绝对数量。我们得出的结论是,T0结构域是以前未识别的ShakerKv1.3 N末端调节区,可调节质膜中的稳态通道蛋白密度。
TheShakersuperfamily encodes voltage-gated potassium (Kv) channels. The amino (N) terminus is important for channel assembly and mediates fast inactivation. We recently isolated a Kv channel from rabbit kidney, denoted rabKv1.3 (Yao et al.,J. Clin. Invest.97, 2525–2533, 1996) and found that deleting a region (T0 domain, amino acids 3–39) proximal to the T1 recognition domain (a.a 42–185) leads to a 13-fold amplification of Kv current as compared to wild type channels (Yao et al.,BBRC249, 492–498). Here we show that deleting the T0 domain affects neither single channel conductance nor channel open probability. Instead, it increases the absolute number of channel proteins present in the membrane. We conclude that the T0 domain is a previously unrecognizedShakerKv1.3, N-terminal regulatory region that modulates steady state channel protein density in the plasma membrane.
DOI: 10.1006/bbrc.1998.9122
发表时间: 1998
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