ProteinMPNN

This repo includes the Kuhlman Lab fork of ProteinMPNN. It includes all the functionality of the original ProteinMPNN repo (linked here), with the following additions:

• Improved input parsing for custom design runs
• Multi-state design support
• Additional utilities to provide integration with EvoPro

Read ProteinMPNN paper.

Installation:

git clone [email protected]:Kuhlman-Lab/proteinmpnn.git
cd proteinmpnn
mamba create env -f setup/proteinmpnn.yml

Usage Guidelines:

General Usage

The different input arguments available for each script can be viewed by adding -h to your python call (e.g., python generate_json.py -h).

ProteinMPNN accepts PDB files as input and produces FASTA files as output.

Unlike the original repo, our ProteinMPNN organizes the different input options (aka arguments) into .flag files:

• json.flags is used to specify design constraints, like fixed residues and symmetry
• proteinmpnn.flags is used to specify prediction flags, like which sampling temperature and model variant to use.

In general, there are two steps to running ProteinMPNN:

1. Run the generate_json.py script and pass it the json.flags file.

• This makes a new file called proteinmpnn_res_specs.json containing parsed design information.

2. Run the run_protein_mpnn.py script and pass it proteinmpnn.flags and proteinmpnn_res_specs.json to obtain the actual ProteinMPNN prediction.

Useful Flags

Used in json.flags:

--default_design_setting: this is an optional filter to allow/disallow certain residue types during design. By default, it is set to all, which allows all 20 amino acids. Possible settings include: all-hydphob: exclude hydrophobic residues (CDEHKNPQRSTX) all-hydphil: exclude hydrophilic residues (ACFGILMPVWYX) all-CLD: exclude specific amino acids (in this case, Cys, Leu, and Asp) L+polar: mix-and-match amino acids and categories (in this case, allow all polar amino acids and also Leu)

Used in proteinmpnn.flags: --model_name: specifies which ProteinMPNN model checkpoint to use. Possible options include: v_48_002: vanilla (default) model with k=48 neighbors and 0.02A noise s_48_010: soluble protein model with k=48 neighbors and 0.1A noise

--sampling_temp: specifies the sampling temperature, which changes how diverse the generated sequences will be. Ranges from 0 to 1, inclusive. A temperature of 0 returns the "best" prediction every time (zero diversity), while a temperature of 1 will return completely random samples. Recommended range is 0.0 - 0.3 or so.

Example Cases

Example input and expected output files, as well as jobscripts and flag files, for many different design tasks are included in examples/. For a summary and explanation of each example, see examples/EXAMPLES.md. Currently supported protocols include:

1. Monomer Design (with user-friendly parsing of designable residues)
2. Binder Design
3. Oligomer Design (with support for abitrary symmetries in homooligomers)
4. Multi-state Design (with support for multiple complex design constraints)

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Unit Testing

TODO

Code organization:

• run/run_protein_mpnn.py - the main script to initialialize and run the model.
• run/generate_json.py - function to automatically generate json of design constraints.
• run/helper_scripts/ - helper functions to parse PDBs, assign which chains to design, which residues to fix, adding AA bias, tying residues etc.
• examples/ - simple example inputs/outputs and runscripts for different tasks.
• model_weights/ - trained proteinmpnn model weights.
  • v_48_... - vanilla proteinmpnn models trained at different noise levels.
  • s_48_... - solublempnn models trained at different noise levels.
  • ca_48_... - Ca-only models trained at different noise levels.

License

ProteinMPNN is distributed under an MIT license, which can be found at proteinmpnn/LICENSE. See license file for more details.