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README.md
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---
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# Protein Data Stability
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## Dataset Structure
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Email: text
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I have purchased a license: checkbox
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---
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# Protein Data Stability - Single Mutation
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This repository contains data on the change in protein stability with a single mutation.
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## Attribution of Data Sources
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- **Primary Source**: Tsuboyama, K., Dauparas, J., Chen, J. et al. Mega-scale experimental analysis of protein folding stability in biology and design. Nature 620, 434–444 (2023). [Link to the paper](https://www.nature.com/articles/s41586-023-06328-6)
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- **Dataset Link**: [Zenodo Record](https://zenodo.org/record/7992926)
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## Sample Protein Stability Data
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| Base Amino Acid Sequence | Mutation | ddG_ML | Classification |
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|---------------------------------------------------------------------------|----------|------------------------|----------------|
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| DEIHIHFNGVTIEFRGLTEEAKKALEEAIKRGASEEELKELARRLIK | base | -0.0675543480388345 | neutral |
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| DEIHIHFNGVTIEFRGLTEEAKKALEEAIKRGASEEELKELARRLIK | D1Q | -0.0162349479755414 | neutral |
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| DEIHIHFNGVTIEFRGLTEEAKKALEEAIKRGASEEELKELARRLIK | D1E | -0.1402534094665108 | neutral |
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| DEIHIHFNGVTIEFRGLTEEAKKALEEAIKRGASEEELKELARRLIK | D1N | 0.0126650189159422 | neutral |
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| DEIHIHFNGVTIEFRGLTEEAKKALEEAIKRGASEEELKELARRLIK | D1H | 0.1970434798619962 | neutral |
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## Dataset Structure
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The dataset focuses on the differential deltaG (mutation minus base) of various protein mutations.
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- **Base Protein Sequence** (`aa_seq`): A (sometimes shortened) amino acid sequence.
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- **Mutation**: Represented as a combination of amino acid and its position (e.g., F10N indicates changing the 10th amino acid (F) in a sequence for N).
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- **delta deltaG** (`ddG_ML`): Derived from a model that makes use of stability measurements measured by two proteases, trypsin and chymotrypsin.
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### Understanding ΔG (delta G)
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ΔG is the Gibbs free energy change of a process, dictating whether a process is thermodynamically favorable:
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- **Negative ΔG**: Indicates the process is energetically favorable. For protein folding, it implies the protein is stable in its folded form.
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- **Positive ΔG**: Indicates the process is not energetically favorable. In protein folding, it means the protein requires energy to maintain its folded state.
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The **delta delta G** (ΔΔG) represents the deltaG of the mutation compared to the base protein:
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- **Positive ΔΔG**: Suggests the mutation decreases protein stability.
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- **Negative ΔΔG**: Suggests the mutation enhances protein stability.
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### Dataset preparation:
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For a quick overview, the relevant dataset structure can be found in `dataset_table.jpeg`.
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### Data Cleanup and Validation:
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1. Filtering: The dataset has been curated to only include examples of single mutations.
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2. Consistency Check: Only rows with consistent mutation indication, aligned with both the base and mutated sequences, have been retained.
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