Kazrin, a novel periplakin-interacting protein associated with desmosomes and the keratinocyte plasma membrane.

Kazrin, a novel periplakin-interacting protein associated with desmosomes and the keratinocyte plasma membrane.
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DOI:
10.1083/jcb.200312123
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发表时间:
2004-08-30
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Watt FM
Watt FM
中科院分区:
其他
文献类型:
--
作者:
Groot KR;Sevilla LM;Nishi K;DiColandrea T;Watt FM

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外环形成了支架的一部分,在支架上组装表皮角化包膜。nh2末端的133个氨基酸介导与质膜的结合,并结合一种新的蛋白质,kazrin。Kazrin是高度保守的,与任何已知的蛋白质都缺乏同源性。有四个选择性剪接转录本,编码三种不同NH2末端的蛋白质。Kazrin在所有层状鳞状上皮中表达;随着外周蛋白的上调,它在基底上层成为膜相关,并被纳入培养的角化细胞的角化包膜。Kazrin在桥粒和桥粒间质膜上与周围蛋白和桥粒蛋白共定位,但其亚细胞分布不依赖于周围蛋白。转染后,所有三种kazrin异构体具有相似的亚细胞分布。我们得出结论,卡兹林是桥粒中的一种新成分,与周缘有关。
Periplakin forms part of the scaffold onto which the epidermal cornified envelope is assembled. The NH2-terminal 133 amino acids mediate association with the plasma membrane and bind a novel protein, kazrin. Kazrin is highly conserved and lacks homology to any known protein. There are four alternatively spliced transcripts, encoding three proteins with different NH2 termini. Kazrin is expressed in all layers of stratified squamous epithelia; it becomes membrane associated in the suprabasal layers, coincident with up-regulation of periplakin, and is incorporated into the cornified envelope of cultured keratinocytes. Kazrin colocalizes with periplakin and desmoplakin at desmosomes and with periplakin at the interdesmosomal plasma membrane, but its subcellular distribution is independent of periplakin. On transfection, all three kazrin isoforms have similar subcellular distributions. We conclude that kazrin is a novel component of desmosomes that associates with periplakin.
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