n-ckpt 0.1

Protein chemical shift prediction based on Protein Language Model

PLM-CS

Predict protein chemical shifts from sequence

The github repository address of the project: https://github.com/doorpro/predict-chemical-shifts-from-protein-sequence. If you have any comments or questions, email the author: [e-mail]

File introduction in the project

af_pdb deposit the protein structures in the solution_nmr test set
af_result_csv deposit the csv files of the protein in solution_nmr test set predicted by PLM-CS
dataset deposit all the dataset include the train set(RefDB) and two test set. The processed tensordataset are also included.
plm_cs Inside the folder are installable plm-cs python sdk.
result This folder is the default save path of prediction result.
esm_process is a tool we provide for preprocessing sequences.
model holds architecture of the model
requirement listed the relevant dependency libraries and version required for training and testing plm-cs.
setup if the local installation setup file for plm-cs.
train_your_model provided the code to completely reproduce the results in our paper.
train provides scripts for training the model if you want to train the model with your own data. utils provides tools for extract protein sequences and chemical shifts from various types of file.

Use PLM-CS through python SDK

Requirement

'torch == 2.5.0',
'torchaudio == 2.5.0',
'torchvision == 0.20.0',
'fair-esm == 2.0.0',
'numpy == 2.1.2',
'biopython == 1.84',
'pandas == 2.2.3'

Install with pip

pip install plm-cs

Or install after git clone

After cloning the complete project file locally, run the following command in the folder containing setup.py

pip install .

Use plm-cs

Using commands similar to the one below, enter the Fasta file or protein sequence and the path to save the result to generate a csv file predicting the chemical shift at the specified location

plm-cs YOURSEQUENCE --result_file your_save_path.csv
plm-cs your_file.fasta --result_file your_save_path.csv

Note that the first time you use it, it takes a lot of time because you need to download the weights of the esm model.

You can simply check by: plm-cs AAAA

Train your model

If you want to train your own PLM-CS model, this repository provides all the tools and data.

Train with RefDB dataset

If you want to train with the data we provide and get the results in the paper, all the processes are already provided in the ipynb file train_your_model.

Training set

We provide the complete training set data in RefDB training dataset. Each file in this folder is in nmrstar format, and each file corresponds to a protein. All proteins contained in the SHIFTX test are removed from it.

Training parameters

Different atom types correspond to different optimizer strategies.You can modify the corresponding parameters in the train.py according to your trained model. The default number of steps for an iteration is 20,000, but you can change it to 5,000 to achieve very close performance while reducing training time

parameters	Cα	Cβ	C	Hα	H	N
learning rate	0.02	5e-4	0.002	0.01	5e-4	5e-4
optimizer	SGD	Adam	Adam	SGD	Adam	Adam

Train with your own dataset

Training set processing

For convenience, the reasoning process of the ESM model is separate from the training process of our regression model. Therefore, we first use ESM-650M to process the data. In esm_process.py we provide a transformation function for the esm model, you need to provide three parameters：protein sequence, chemical shifts, mask. The sequence representing the protein, the sequence specifying the chemical shift of the atom, and the mask sequence (if any of the tags for a particular sequence are missing). These three sequences should be of equal length. The function outputs four processed data, you need to concat multiple sequences of data in the batch size dimension and save them as the tensordataset in this manner.

dataset = TensorDataset(all_esm_vec, all_label, all_mask, all_padding_mask)

The final dimension of each parameter should be: b×512×1280, b×512×1, b×512×1, b×512×1

Train

Modify the path in the train.py to your own parh. Also, be aware that this can only train a model of one type of atom at a time.