ZRP-1, a Zyxin-related Protein, Interacts with the Second PDZ Domain of the Cytosolic Protein Tyrosine Phosphatase hPTP1E*

ZRP-1, a Zyxin-related Protein, Interacts with the Second PDZ Domain of the Cytosolic Protein Tyrosine Phosphatase hPTP1E*
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ZRP-1 是一种 Zyxin 相关蛋白,与胞浆蛋白酪氨酸磷酸酶 hPTP1E* 的第二个 PDZ 结构域相互作用

DOI:
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发表时间:
1999
影响因子:
4.8
通讯作者:
D. Banville
D. Banville
中科院分区:
生物学2区
文献类型:
--
作者:
K. Murthy;K. Clark;Y. Fortin;S. Shen;D. Banville

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蛋白质-蛋白质相互作用在细胞信号级联的特异性中起着重要作用。利用酵母双杂交系统,在胞质蛋白酪氨酸磷酸酶hPTP 1 E的第二个PDZ结构域与一个新蛋白质(ZRP-1)之间发现了特异性的相互作用,该蛋白质与Zyxin蛋白家族的序列相似,命名为ZRP-1。编码该蛋白的mRNA广泛分布于人体组织中,包含1428个碱基对的开放阅读框架,预测为476个氨基酸残基的多肽。推导的蛋白质显示一个富含脯氨酸的氨基末端区域和三个双锌指LIM结构域在其羧基末端。这种新的蛋白质与hPTP 1 E的第二PDZ结构域的特异性相互作用在体外,使用细菌表达的蛋白质,并在体内,通过免疫共沉淀研究证明。缺失分析表明,在酵母双杂交系统中,hPTP 1 E的第二个PDZ结构域需要一个完整的羧基端才能与之相互作用,并提示包括LIM结构域在内的其他序列也参与了这种相互作用。ZRP-1编码序列的基因组结构与另一种Zyxin相关蛋白质脂肪瘤首选伴侣基因的基因组结构相同,表明这两个基因是从最近的基因重复事件中进化而来的。
Protein-protein interactions play an important role in the specificity of cellular signaling cascades. By using the yeast two-hybrid system, a specific interaction was identified between the second PDZ domain of the cytosolic protein tyrosine phosphatase hPTP1E and a novel protein, which was termed ZRP-1 to indicate its sequence similarity to the Zyxin protein family. The mRNA encoding this protein is distributed widely in human tissues and contains an open reading frame of 1428 base pairs, predicting a polypeptide of 476 amino acid residues. The deduced protein displays a proline-rich amino-terminal region and three double zinc finger LIM domains at its carboxyl terminus. The specific interaction of this novel protein with the second PDZ domain of hPTP1E was demonstrated both in vitro, using bacterially expressed proteins, and in vivo, by co-immunoprecipitation studies. Deletion analysis indicated that an intact carboxyl terminus is required for its interaction with the second PDZ domain of hPTP1E in the yeast two-hybrid system and suggested that other sequences, including the LIM domains, also participate in the interaction. The genomic organization of the ZRP-1 coding sequence is identical to that of the lipoma preferred partner gene, another Zyxin-related protein, suggesting that the two genes have evolved from a recent gene duplication event.
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发表时间: 1992-02
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DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
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