3DMolMS: prediction of tandem mass spectra from 3D molecular conformations
Project description
3DMolMS
3D Molecular Network for Mass Spectra Prediction (3DMolMS) is a deep neural network model to predict the MS/MS spectra of compounds from their 3D conformations. This model's molecular representation, learned through MS/MS prediction tasks, can be further applied to enhance performance in other molecular-related tasks, such as predicting retention times and collision cross sections.
Read our paper in Bioinformatics | Try our online service at GNPS | Install from PyPI
Installation
3DMolMS is available on PyPI. You can install the latest version using pip
:
pip install molnetpack
# PyTorch must be installed separately.
# For CUDA 11.6, install PyTorch with the following command:
pip install torch==1.13.0+cu116 torchvision==0.14.0+cu116 torchaudio==0.13.0 --extra-index-url https://download.pytorch.org/whl/cu116
# For CUDA 11.7, use:
pip install torch==1.13.0+cu117 torchvision==0.14.0+cu117 torchaudio==0.13.0 --extra-index-url https://download.pytorch.org/whl/cu117
# For CPU-only usage, use:
pip install torch==1.13.0+cpu torchvision==0.14.0+cpu torchaudio==0.13.0 --extra-index-url https://download.pytorch.org/whl/cpu
3DMolMS can also be installed through source codes:
git clone https://github.com/JosieHong/3DMolMS.git
cd 3DMolMS
pip install .
Usage
To get started quickly, you can load a CSV or MGF file to predict MS/MS and then plot the predicted results.
import torch
from molnetpack import MolNet
# Set the device to CPU for CPU-only usage:
device = torch.device("cpu")
# For GPU usage, set the device as follows (replace '0' with your desired GPU index):
# gpu_index = 0
# device = torch.device(f"cuda:{gpu_index}")
# Instantiate a MolNet object
molnet_engine = MolNet(device, seed=42) # The random seed can be any integer.
# Load input data (here we use a CSV file as an example)
molnet_engine.load_data(path_to_test_data='./test/input_msms.csv')
# molnet_engine.load_data(path_to_test_data='./test/input_msms.mgf') # MGF file is also supported
# Predict MS/MS
spectra = molnet_engine.pred_msms(path_to_results='./test/output_msms.mgf')
# Plot the predicted MS/MS with 3D molecular conformation
molnet_engine.plot_msms(dir_to_img='./img/')
For CCS prediction, please use the following codes after instantiating a MolNet object.
# Load input data
molnet_engine.load_data(path_to_test_data='./test/input_ccs.csv')
# Pred CCS
ccs_df = molnet_engine.pred_ccs(path_to_results='./test/output_ccs.csv')
For saving the molecular embeddings, please use the following codes after instantiating a MolNet object.
# Load input data
molnet_engine.load_data(path_to_test_data='./test/input_savefeat.csv')
# Inference to get the features
features = molnet_engine.save_features()
print('Titles:', ids)
print('Features shape:', features.shape)
The sample input files, a CSV and an MGF, are located at ./test/demo_input.csv
and ./test/demo_input.mgf
, respectively. If the input data is only expected to be used in CCS prediction, you may assign an arbitrary numerical value to the Collision_Energy
field in the CSV file or to COLLISION_ENERGY
in the MGF file. It's important to note that during the data loading phase, any input formats that are not supported will be automatically excluded. Below is a table outlining the types of input data that are supported:
Item | Supported input |
---|---|
Atom number | <=300 |
Atom types | 'C', 'O', 'N', 'H', 'P', 'S', 'F', 'Cl', 'B', 'Br', 'I', 'Na' |
Precursor types | '[M+H]+', '[M-H]-', '[M+H-H2O]+', '[M+Na]+', '[M+2H]2+' |
Collision energy | any number |
The documents for running MS/MS prediction from source codes are at MSMS_PRED.md.
Citation
If you use 3DMolMS in your research, please cite our paper:
@article{hong20233dmolms,
title={3DMolMS: prediction of tandem mass spectra from 3D molecular conformations},
author={Hong, Yuhui and Li, Sujun and Welch, Christopher J and Tichy, Shane and Ye, Yuzhen and Tang, Haixu},
journal={Bioinformatics},
volume={39},
number={6},
pages={btad354},
year={2023},
publisher={Oxford University Press}
}
Thank you for considering 3DMolMS for your research needs!
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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