A carboxyl-terminal interaction of lamin B1 is dependent on the CAAX endoprotease Rce1 and carboxymethylation.

A carboxyl-terminal interaction of lamin B1 is dependent on the CAAX endoprotease Rce1 and carboxymethylation.
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DOI:
10.1083/jcb.200303113
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发表时间:
2003-09-29
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Vaux DJ
Vaux DJ
中科院分区:
其他
文献类型:
--
作者:
Maske CP;Hollinshead MS;Higbee NC;Bergo MO;Young SG;Vaux DJ

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哺乳动物核纤层蛋白核纤层蛋白B1通过法尼基化、内蛋白水解和羧基末端CAAX基序的羧甲基化进行后修饰。在这项工作中,我们证明了CAAX内切蛋白酶Rce1是所需的核纤层蛋白B1内切蛋白水解,证明了一个独立的池的蛋白水解,但非甲基化的核纤层蛋白B1,以及完全加工的核纤层蛋白B1,在间期核,并显示了甲基化的核纤层蛋白B1的组织结构域的作用。核纤层蛋白B1的内蛋白水解或甲基化缺陷导致核纤层的完整性丧失和变形。这些数据表明,核被膜和纤层的组织依赖于涉及核纤层蛋白B1甲基化的机制,并且它们确定了涉及B型核纤层蛋白的核纤层蛋白病的潜在机制。
The mammalian nuclear lamina protein lamin B1 is posttranslationally modified by farnesylation, endoproteolysis, and carboxymethylation at a carboxyl-terminal CAAX motif. In this work, we demonstrate that the CAAX endoprotease Rce1 is required for lamin B1 endoproteolysis, demonstrate an independent pool of proteolyzed but nonmethylated lamin B1, as well as fully processed lamin B1, in interphase nuclei, and show a role for methylation in the organization of lamin B1 into domains of the nuclear lamina. Deficiency in the endoproteolysis or methylation of lamin B1 results in loss of integrity and deformity of the nuclear lamina. These data show that the organization of the nuclear envelope and lamina is dependent on a mechanism involving the methylation of lamin B1, and they identify a potential mechanism of laminopathy involving a B-type lamin.
鸡发育过程中核层粘连蛋白的差异表达。
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