Prediction of S-glutathionylation sites based on protein sequences.

Prediction of S-glutathionylation sites based on protein sequences.
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基于蛋白质序列的S-谷胱甘肽化位点预测

DOI:
10.1371/journal.pone.0055512
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Zhao XM
Zhao XM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sun C;Shi ZZ;Zhou X;Chen L;Zhao XM

文献摘要

参考文献

相似文献

S-谷胱甘肽化(S-glutathionylation)是蛋白质中谷胱甘肽(glutathione,GSH)和半胱氨酸残基之间混合二硫键的可逆形成,是翻译后修饰的一种特殊形式,在多种生物学过程中发挥重要作用,包括信号转导、氧化还原稳态和细胞内代谢。通过实验鉴定S-谷胱甘肽化位点是劳动密集型和耗时的,而生物信息学方法通过计算机预测S-谷胱甘肽化位点为这个问题提供了另一种方法。生物信息学方法不仅为进一步的实验验证提供了候选位点,而且还为S-谷胱甘肽化机制提供了生物化学见解。本文首先从文献中收集了实验确定的S-谷胱甘肽化蛋白及其相应的修饰位点,然后提出了一种基于蛋白质序列数据的机器学习方法预测S-谷胱甘肽化位点的新方法。通过我们的方法获得了有希望的结果,在5倍交叉验证中AUC(ROC曲线下面积)得分为0.879,这证明了我们所提出的方法的预测能力。本工作中使用的数据集可在http://csb.shu.edu.cn/SGDB上获得。
S-glutathionylation, the reversible formation of mixed disulfides between glutathione(GSH) and cysteine residues in proteins, is a specific form of post-translational modification that plays important roles in various biological processes, including signal transduction, redox homeostasis, and metabolism inside cells. Experimentally identifying S-glutathionylation sites is labor-intensive and time consuming, whereas bioinformatics methods provide an alternative way to this problem by predicting S-glutathionylation sites in silico. The bioinformatics approaches give not only candidate sites for further experimental verification but also bio-chemical insights into the mechanism of S-glutathionylation. In this paper, we firstly collect experimentally determined S-glutathionylated proteins and their corresponding modification sites from the literature, and then propose a new method for predicting S-glutathionylation sites by employing machine learning methods based on protein sequence data. Promising results are obtained by our method with an AUC (area under ROC curve) score of 0.879 in 5-fold cross-validation, which demonstrates the predictive power of our proposed method. The datasets used in this work are available at http://csb.shu.edu.cn/SGDB.
DOI: 10.1186/1752-0509-4-s2-s12
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DOI: 10.1371/journal.pone.0004920
发表时间: 2009
期刊: PloS one
影响因子: 3.7
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