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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Nuclear localization of basonuclin in human keratinocytes and the role of phosphorylation
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Nuclear localization of basonuclin in human keratinocytes and the role of phosphorylation

机译:Basonuclin在人角质形成细胞中的核定位和磷酸化的作用

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摘要

Basonuclin is a zinc-finger protein found in basal cells of the epidermis. In human keratinocyte cultures, basonuclin is susceptible to serine-phosphorylation and the addition of the phosphatase inhibitor, okadaic acid, promotes accumulation of basonuclin in the cytoplasm. The region of basonuclin containing the nuclear localization signal of ba- sonuclin is necessary for nuclear localization of the protein and Ser-541, located immediately C-terminal to the nuclear localization signal, is the principal phosphorylation site in vitro. A nearly complete basonuclin transiently expressed in cultured keratinocytes localizes predominantly in the nucleus, but substitution of aspartic acid for Ser-541 promotes cyto- plasmic localization.
机译:Basonuclin是在表皮基底细胞中发现的锌指蛋白。在人角质形成细胞培养物中,巴斯克uclin易受丝氨酸磷酸化作用,而磷酸酶抑制剂冈田酸的加入会促进巴斯克uclin在细胞质中的积累。含有basonuclin核定位信号的basonuclin区域对于蛋白质的核定位是必不可少的,而Ser-541位于核定位信号的C末端,是体外的主要磷酸化位点。在培养的角质形成细胞中瞬时表达的近乎完整的巴斯克蛋白主要定位在细胞核中,但是用天冬氨酸替代Ser-541可以促进细胞质定位。

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