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scRegulate

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Python Toolkit for Transcription Factor Activity Inference and Clustering of scRNA-seq Data

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# scRegulate<img src="https://raw.githubusercontent.com/YDaiLab/scRegulate/main/assets/tool_logo.svg" align="right" width="360" />
**S**ingle-**C**ell **Regula**tory-Embedded Variational Inference of **T**ranscription Factor Activity from Gene **E**xpression

[![GitHub issues](https://img.shields.io/github/issues/YDaiLab/scRegulate)](https://github.com/YDaiLab/scRegulate/issues)
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## Introduction
**scRegulate** is a powerful tool designed for the inference of transcription factor activity from single cell/nucleus RNA data using advanced generative modeling techniques. It leverages a unified learning framework to optimize the modeling of cellular regulatory networks, providing researchers with accurate insights into transcriptional regulation. With its efficient clustering capabilities, **scRegulate** facilitates the analysis of complex biological data, making it an essential resource for studies in genomics and molecular biology.

For further information and example tutorials, please check our documentation:
- [PBMC 3K Tutorial (HTML)](https://ydailab.github.io/scRegulate/tutorial_main.html)  
- [Reproducibility Guide (HTML)](https://ydailab.github.io/scRegulate/Data_Preparation.html)

If you have any questions or concerns, feel free to [open an issue](https://github.com/YDaiLab/scRegulate/issues).

## Requirements
scRegulate is implemented in the PyTorch framework. Running scRegulate on `CUDA` is highly recommended if available.

Before installing and running scRegulate, ensure you have the following libraries installed:
- **PyTorch** (version 2.0 or higher)  
  Install with the exact command from the [PyTorch “Get Started” page](https://pytorch.org/get-started/locally/) for your OS, Python version and (optionally) CUDA toolkit.
- **NumPy** (version 1.23 or higher)
- **Scanpy** (version 1.9 or higher)
- **Anndata** (version 0.8 or higher)

You can install these dependencies using `pip`:

```bash
pip install torch numpy scanpy anndata
```

## Installation

**Option 1:**  
You can install **scRegulate** via pip for a lightweight installation:

```bash
pip install scregulate
```

**Option 2:**  
Alternatively, if you want the latest, unreleased version, you can install it directly from the source on GitHub:

```bash
pip install git+https://github.com/YDaiLab/scRegulate.git
```

**Option 3:**  
For users who prefer Conda or Mamba for environment management, you can install **scRegulate** along with extra dependencies:

**Conda:**
```bash
conda install -c zandigohar scregulate
```

**Mamba:**
```bash
mamba create -n scRegulate -c zandigohar scregulate
```

## FAQ

**Q1: Do I need a GPU to run scRegulate?**  
No, a GPU is not required. However, using a CUDA-enabled GPU is strongly recommended for faster training and inference, especially with large datasets.

**Q2: How do I know if I can use a GPU with scRegulate?**  
There are two quick checks:

1. **System check**  
   In your terminal, run `nvidia-smi`. If you see your GPU listed (model, memory, driver version), your machine has an NVIDIA GPU with the driver installed.

2. **Python check**  
   In a Python shell, run:
   ```python
   import torch
   print(torch.cuda.is_available())  # True means PyTorch can see your GPU
   print(torch.cuda.device_count())  # How many GPUs are usable
   ```

**Q3: Can I use scRegulate with Seurat or R-based tools?**  
scRegulate is written in Python and works directly with `AnnData` objects (e.g., from Scanpy). You can convert Seurat objects to AnnData using tools like `SeuratDisk`.

**Q4: How can I visualize inferred TF activities?**  
TF activities inferred by scRegulate are stored in the `obsm` slot of the AnnData object. You can use `scanpy.pl.embedding`, `scanpy.pl.heatmap`, or export the matrix for custom plots.

**Q5: What kind of prior networks does scRegulate accept?**  
scRegulate supports user-provided gene regulatory networks (GRNs) in CSV or matrix format. These can be curated from public databases or inferred from ATAC-seq or motif analysis.

**Q6: Can I use scRegulate for multi-omics integration?**  
Not directly. While scRegulate focuses on TF activity from RNA, you can incorporate priors derived from other omics (e.g., ATAC) to **guide** the model.

**Q7: What file formats are supported?**  
scRegulate works with `.h5ad` files (AnnData format). Input files should contain gene expression matrices with proper normalization.

**Q8: How do I cite scRegulate?**  
See the [Citation](#citation) section below for the latest reference and preprint link.

**Q9: How can I reproduce the paper’s results?**  
See our [Reproducibility Guide](https://github.com/YDaiLab/scRegulate/blob/main/notebooks/Data_Preparation.ipynb) for step-by-step instructions. Then run scregulate.

## Citation

If you use **scRegulate** in your research, please cite:

Mehrdad Zandigohar, Jalees Rehman, Yang Dai, **scRegulate: single-cell regulatory-embedded variational inference of transcription factor activity from gene expression**, _Bioinformatics_, Volume 41, Issue 12, December 2025, btaf638, [doi.org/10.1093/bioinformatics/btaf638](https://doi.org/10.1093/bioinformatics/btaf638)

## Development & Contact
scRegulate was developed and is actively maintained by Mehrdad Zandigohar as part of his PhD research at the University of Illinois Chicago (UIC), in the lab of Dr. Yang Dai.

📬 For private questions, please email: mzandi2@uic.edu

🤝 For collaboration inquiries, please contact PI: Dr. Yang Dai (yangdai@uic.edu)

Contributions, feature suggestions, and feedback are always welcome!

## License

The code in **scRegulate** is licensed under the [MIT License](https://opensource.org/licenses/MIT), which permits academic and commercial use, modification, and distribution.

Please note that any third-party dependencies bundled with **scRegulate** may have their own respective licenses.

scRegulate

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