用新嵌入+改进GAN生成特定属性分子,精准设计气味分子
Improved Molecular Generation through Attribute-Driven Integrative Embeddings and GAN Selectivity
- 用摩根指纹+分子属性构建新嵌入,让Transformer学全貌
- 94%还原率验证嵌入有效,改进损失函数后仅生成气味分子
- 适合药物、香料等需定制分子的设计场景
药物发现和化学工程等领域对具有特定性质的分子需求日益增长,推动了计算分子设计方法的发展。本文提出一种基于Transformer的向量嵌入生成器,结合改进的生成对抗网络(GAN),用于生成具备目标属性的分子。嵌入生成器采用新型分子描述符,融合摩根指纹与全局分子属性,使Transformer能够捕捉局部官能团和整体分子特征。通过修改GAN生成器的损失函数,确保生成具有特定属性的分子。该Transformer在将分子描述符转换回SMILES字符串时达到94%的重构准确率,验证了所提嵌入在生成任务中的有效性。在含气味与非气味化合物标签的数据集上进行验证,使用改进的范围损失函数后,GAN可完全生成气味分子。本工作展示了结合新型向量嵌入与Transformer及改进GAN架构,在加速定制分子发现方面的潜力,为多种分子设计应用提供有力工具。
原文摘要 · Abstract (English)
The growing demand for molecules with tailored properties in fields such as drug discovery and chemical engineering has driven advancements in computational methods for molecular design. Machine learning-based approaches for de-novo molecular generation have recently garnered significant attention. This paper introduces a transformer-based vector embedding generator combined with a modified Generative Adversarial Network (GAN) to generate molecules with desired properties. The embedding generator utilizes a novel molecular descriptor, integrating Morgan fingerprints with global molecular attributes, enabling the transformer to capture local functional groups and broader molecular characteristics. Modifying the GAN generator loss function ensures the generation of molecules with specific desired properties. The transformer achieves a reconversion accuracy of 94% while translating molecular descriptors back to SMILES strings, validating the utility of the proposed embeddings for generative tasks. The approach is validated by generating novel odorant molecules using a labeled dataset of odorant and non-odorant compounds. With the modified range-loss function, the GAN exclusively generates odorant molecules. This work underscores the potential of combining novel vector embeddings with transformers and modified GAN architectures to accelerate the discovery of tailored molecules, offering a robust tool for diverse molecular design applications.
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