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arXiv 0902.3148q-bio.QM
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一种用于跨膜蛋白分类的分层人工神经网络系统

An hierarchical artificial neural network system for the classification of transmembrane proteins

Claude Pasquier, Stavros Hamodrakas

摘要:

本工作提出了一个简单的人工神经网络,它从它们的序列单独的蛋白质分为两类:膜蛋白类和非膜蛋白类。这在完整基因组中鉴定的开放阅读框(ORF)的功能分配和分析中可能是重要的,特别是对应于具有未知功能的蛋白质的那些ORF。这里描述的网络具有简单的分层前馈拓扑结构和有限数量的神经元,这使得它非常快。通过仅使用包含在11个蛋白质序列中的信息,该方法能够以100%的准确度鉴定从文献中的几篇论文中收集的具有可靠拓扑结构的所有膜蛋白。应用于995个球状水溶性蛋白质的测试集,神经网络错误地将其中23个分类为膜蛋白类(正确分配率为97.7%)。该方法也适用于完整的SWISS-PROT数据库,取得了相当大的成功,并对ORF的几个完整的基因组。所开发的神经网络与PRED-TMR算法相关联(Pasquier,C.,V.J.,帕莱奥斯,佐治亚州,Hamodrakas,J.S.和Hamodrakas,S. J.,1999年)在一个新的应用程序包称为PRED-TMR 2。运行PRED-TMR 2软件的WWW服务器可从http://o2.db.uoa.gr/PRED-TMR2获得

英文摘要:

This work presents a simple artificial neural network which classifies proteins into two classes from their sequences alone: the membrane protein class and the non-membrane protein class. This may be important in the functional assignment and analysis of open reading frames (ORF's) identified in complete genomes and, especially, those ORF's that correspond to proteins with unknown function. The network described here has a simple hierarchical feed-forward topology and a limited number of neurons which makes it very fast. By using only information contained in 11 protein sequences, the method was able to identify, with 100% accuracy, all membrane proteins with reliable topologies collected from several papers in the literature. Applied to a test set of 995 globular, water-soluble proteins, the neural network classified falsely 23 of them in the membrane protein class (97.7% of correct assignment). The method was also applied to the complete SWISS-PROT database with considerable success and on ORF's of several complete genomes. The neural network developed was associated with the PRED-TMR algorithm (Pasquier,C., Promponas,V.J., Palaios,G.A., Hamodrakas,J.S. and Hamodrakas,S.J., 1999) in a new application package called PRED-TMR2. A WWW server running the PRED-TMR2 software is available at http://o2.db.uoa.gr/PRED-TMR2

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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