Kumar Ambuj, Purohit Rituraj
Bioinformatics Division, School of Bio Sciences and Technology, Vellore Institute of Technology University, Vellore, Tamil Nadu, India.
PLoS Comput Biol. 2014 Apr 10;10(4):e1003318. doi: 10.1371/journal.pcbi.1003318. eCollection 2014 Apr.
Computational prediction of cancer associated SNPs from the large pool of SNP dataset is now being used as a tool for detecting the probable oncogenes, which are further examined in the wet lab experiments. The lack in prediction accuracy has been a major hurdle in relying on the computational results obtained by implementing multiple tools, platforms and algorithms for cancer associated SNP prediction. Our result obtained from the initial computational compilations suggests the strong chance of Aurora-A G325W mutation (rs11539196) to cause hepatocellular carcinoma. The implementation of molecular dynamics simulation (MDS) approaches has significantly aided in raising the prediction accuracy of these results, but measuring the difference in the convergence time of mutant protein structures has been a challenging task while setting the simulation timescale. The convergence time of most of the protein structures may vary from 10 ns to 100 ns or more, depending upon its size. Thus, in this work we have implemented 200 ns of MDS to aid the final results obtained from computational SNP prediction technique. The MDS results have significantly explained the atomic alteration related with the mutant protein and are useful in elaborating the change in structural conformations coupled with the computationally predicted cancer associated mutation. With further advancements in the computational techniques, it will become much easier to predict such mutations with higher accuracy level.
从大量单核苷酸多态性(SNP)数据集中对癌症相关SNP进行计算预测,目前正被用作检测可能的致癌基因的工具,这些致癌基因会在湿实验室实验中进一步研究。预测准确性的不足一直是依赖通过多种工具、平台和算法进行癌症相关SNP预测所获得的计算结果的主要障碍。我们从最初的计算汇编中获得的结果表明,极光激酶A(Aurora-A)G325W突变(rs11539196)极有可能导致肝细胞癌。分子动力学模拟(MDS)方法的应用显著提高了这些结果的预测准确性,但在设置模拟时间尺度时,测量突变蛋白结构收敛时间的差异一直是一项具有挑战性的任务。大多数蛋白质结构的收敛时间可能因大小而异,从10纳秒到100纳秒或更长。因此,在这项工作中,我们实施了200纳秒的MDS,以辅助从计算SNP预测技术获得的最终结果。MDS结果显著解释了与突变蛋白相关的原子变化,有助于阐述与计算预测的癌症相关突变相关的结构构象变化。随着计算技术的进一步发展,以更高的准确性预测此类突变将变得更加容易。
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