DNDesign: Denoising is All You Need for Protein Inverse Folding

Youhan Lee, Jaehoon Kim

Keywords: Protein sequence design, Inverse folding, Denoising, Protein modeling

TL;DR: We describe a denoising-enhanced inverse folding framework for protein sequence design and show the novelty by providing protein sequence design performances and potential energy analysis.

Abstract: Based on the central dogma that protein structure determines its functionality, an important approach for protein sequence design is to identify promising sequences that fold into pre-designed structures based on domain knowledge. Numerous studies have introduced deep generative model-based inverse-folding, which utilizes various generative models to translate fixed backbones to corresponding sequences. In this work, we reveal that denoising training enables models to deeply capture the protein energy landscape, which previous models do not fully leverage. Based on this, we propose a novel Denoising-enhanced protein fixed backbone design (DNDesign), which combines conventional inverse-folding networks with a novel plug-in module, which learns the physical understanding via denoising training and transfers the knowledge to the entire network. Through extensive experiments, we demonstrate that DNDesign can easily be integrated into state-of-the-art models and improve performance in multiple modes, including auto-regressive, non-auto-regressive, and scaled-up scenarios. Furthermore, we introduce a fixed backbone conservation analysis based on potential energy changes, which confirms that DNDesign ensures more energetically favorable inverse-folding.

Submission Number: 7789