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硫氧还蛋白超家族的一个新型核成员。

A novel nuclear member of the thioredoxin superfamily.

作者信息

Laughner B J, Sehnke P C, Ferl R J

机构信息

Plant Molecular and Cellular Biology Program, Department of Horticultural Sciences, University of Florida, Gainesville, Florida 32611, USA.

出版信息

Plant Physiol. 1998 Nov;118(3):987-96. doi: 10.1104/pp.118.3.987.

Abstract

We describe the isolation and characterization of a cDNA encoding maize (Zea mays L.) nucleoredoxin (NRX), a novel nuclear protein that is a member of the thioredoxin (TRX) superfamily. NRX is composed of three TRX-like modules arranged as direct repeats of the classic TRX domain. The first and third modules contain the amino acid sequence WCPPC, which indicates the potential for TRX oxidoreductase activity, and insulin reduction assays indicate that at least the third module possesses TRX enzymatic activity. The carboxy terminus of NRX is a non-TRX module that possesses C residues in the proper sequence context to form a Zn finger. Immunolocalization preferentially to the nucleus within developing maize kernels suggests a potential for directed alteration of the reduction state of transcription factors as part of the events and pathways that regulate gene transcription.

摘要

我们描述了一种编码玉米(Zea mays L.)核硫氧还蛋白(NRX)的cDNA的分离和特性,NRX是一种新型核蛋白,属于硫氧还蛋白(TRX)超家族成员。NRX由三个类似TRX的模块组成,这些模块排列成经典TRX结构域的直接重复序列。第一个和第三个模块包含氨基酸序列WCPPC,这表明具有TRX氧化还原酶活性的潜力,胰岛素还原试验表明至少第三个模块具有TRX酶活性。NRX的羧基末端是一个非TRX模块,其具有以适当序列形成锌指的C残基。在发育中的玉米粒中优先定位于细胞核的免疫定位表明,作为调节基因转录的事件和途径的一部分,转录因子还原状态的定向改变具有可能性。

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