用DNABERT模型预测非编码突变对基因调控的影响,助力癌症研究
DeepVRegulome: DNABERT-based deep-learning framework for predicting the functional impact of short genomic variants on the human regulome
- 融合464个微调的DNABERT模型,分析转录因子与组蛋白结合位点变化
- 发现9837个影响转录因子结合的突变,1352个与胶质母细胞瘤患者生存相关
- 提供可交互数据门户,适合基因组学与精准医疗研究者使用
全基因组测序揭示了大量非编码短变异,但其功能影响尚不明确。尽管深度学习在基因组学中取得进展,准确预测和优先排序基因调控区中的临床相关突变仍是重大挑战。我们开发了DeepVRegulome,一个整合464个微调的DNABERT模型(458个转录因子、4个组蛋白修饰、2个剪接位点模型)的计算框架,训练数据来自ENCODE和GENCODE。该框架结合定量变异评分(基于似然比)、注意力机制的基序分析,以及基于Kaplan-Meier和Cox比例风险模型的生存分析,以关联高影响突变与临床结局。为验证其准确性,我们将其与独立的等位基因特异性转录因子结合实验(SNP-SELEX)对比,并与四种现有预测工具比较。分析识别出572个剪接破坏型突变和9,837个改变转录因子结合位点的突变,这些突变在超过10%的胶质母细胞瘤样本中出现。生存分析将1,352个突变和563个被破坏的调控区域与患者预后关联,实现基于非编码突变特征的分层。所有代码、微调模型及交互式数据门户均公开可用。
原文摘要 · Abstract (English)
Whole-genome sequencing (WGS) has revealed numerous non-coding short variants whose functional impacts remain poorly understood. Despite recent advances in deep-learning genomic approaches, accurately predicting and prioritizing clinically relevant mutations in gene regulatory regions remains a major challenge. We developed DeepVRegulome, a computational framework integrating 464 fine-tuned DNABERT models (458 transcription factor, 4 histone mark, and 2 splice site models) trained on ENCODE and GENCODE datasets. The framework pairs these deep learning models with a suite of analytical tools: quantitative variant scoring via log-odds ratios to assess functional impact, attention-based motif analysis to identify disrupted sequence patterns, and survival analysis using Kaplan-Meier and Cox proportional hazards models to link high-impact variants with clinical outcomes. To ensure the framework accurately captures variant effects on baseline binding status, we benchmarked DeepVRegulome against an independent experimental assay of allele-specific transcription factor binding (SNP-SELEX) data and compared its performance to four established variant-effect predictors. The analysis identified 572 splice-disrupting and 9,837 transcription-factor binding site-altering mutations occurring in greater than 10 percentage of glioblastoma samples. Survival analysis linked 1352 mutations and 563 disrupted regulatory regions to patient outcomes, enabling stratification via non-coding mutation signatures. All the code, fine-tuned models, and an interactive data portal are publicly available.
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