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ShouWenWang-Lab / snakemake_DARLIN

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DARLIN

This is a Snakemake pipeline to automatically preprocess data (e.g., run PEAR to merge R1 and R2), conduct sequence quality control, and run the CARLIN pipeline. It is especially useful when you have multiple samples from a single sequencing run. This is developed through the DARLIN project L. Li,...,S.-W. Wang, F. Camargo, Cell (2023).

Note that this pipeline must be used with a customized version of the CARLIN pipeline, which we adapted from the original software to deal with several different DARLIN references in the CA, TA, and RA loci respectively.

Installation

First, make a conda environment:

kernel_name='snakemake_darlin'
conda create -n $kernel_name python=3.9 --yes
conda activate $kernel_name
conda install -c conda-forge mamba --yes
mamba install -c conda-forge -c bioconda  snakemake=7.24.0 --yes
pip install --user ipykernel
pip install jupyterlab umi_tools seaborn papermill biopython
python -m ipykernel install --user --name=$kernel_name

Next, go to a directory where you want to store the code and install all relevant packages

code_directory='.' # change it to the directory where you want to put the packages
cd $code_directory

git clone https://github.com/ShouWenWang-Lab/snakemake_DARLIN --depth=1
cd snakemake_DARLIN
python setup.py develop
cd ..

mkdir CARLIN_pipeline
cd CARLIN_pipeline
git clone https://github.com/ShouWenWang-Lab/Custom_CARLIN --depth=1

Finally, you need to install pear and MATLAB. It is often needed to install pear on a HPC locally so that no root permission is needed. To do so, you can use ./configure --prefix /local/directory to install it locally where you do have access. Below is an example script for installing pear on HPC locally.

cd pear_installation_folder
./configure --prefix ~ # install at the local home directory
make
make install

MATLAB should be available in the command line interface. In an HPC environment, MATLAB can be loaded with the command:

module load matlab

MATLAB should have Bioinformatics Toolbox and Image Processing Toolbox addons installed. FastQC and MultiQC should also be available from the command line, otherwise you will not get the QC report (however, you can finish the DARLIN preprocessing without them).

This pipeline also use fastqc and multiqc to visualize sequence quality. The pipeline should run correctly even without them. But if you want to see the QC results, please have these two commands available in the terminal.

Usage

The pipeline assumes that it is being called on a server with SLURM if sbatch=1 in the config file (see below). If not, you can copy-and-paste the generated command and run it locally.

With sbatch=0, it should run properly in a normal Linux system without SLURM. However, it cannot submit jobs and run them in parallel in this case.

File structure

image info

As indicated in the above example, the config.yaml file should be at the root folder of a project, and the fastq data should be at the folder raw_fastq.

We assume that the data is generated with Miseq machine from Illumina. Specifically, we assume that the file name starts with a sample_ID, and has both R1 and R2:

fq_R1=f"{sample}_L001_R1_001.fastq.gz"
fq_R2=f"{sample}_L001_R2_001.fastq.gz"

Please rename the files if they are not in this format. An example of config.yaml file is as follows:

project_name : 'Li_112219'
project_ID : '144505366'
SampleList : ['HSC','MPP','MyP'] #Remove 1_S*, it will have few reads, affect the output
cfg_type : 'sc10xV3' # available protocol: BulkRNA_Tigre_14UMI, BulkRNA_Rosa_14UMI, BulkRNA_12UMI, scCamellia,sc10xV3
template : 'cCARLIN' # short_primer_set: {Tigre_2022_v2, Rosa_v2, cCARLIN}, long_primer_set: {Tigre_2022,Rosa,cCARLIN}
read_cutoff_UMI_override : [3,10] # assume to be a list, UMI cutoff is the same as CB cutoff for single-cell protocol
CARLIN_memory_factor : 300 # request memory at X times the size of the pear fastq file.
sbatch : 1 # 1, run sbatch job;  0, run in the interactive mode. 
CARLIN_max_run_time : 12 # hour

code_directory should be the same directory where you clone the code.

SampleList should be the list of samples that you want to analyze.

cfg_type should match the protocol of the experiment. Some of the provided protocols include:

read_cutoff_UMI_override: minimum number of reads needed to support a UMI (bulk library) or a cell barcode (single cell library). It should be a list of read cutoff like [3,10].

CARLIN_memory_factor: When running on o2, the requested memory should be CARLIN_memory_factor times the fastq file size.

sbatch: when running on o2, whether to run with sbatch jobs (1) or in interactive mode (0).

CARLIN_max_run_time: When running on o2, the maximum run time to request, in the unit of hours.

Getting data from base space

When the fastq files are not downloaded yet in the raw_fastq folder, and the data sits at base space of Illumina, you can provide project_name and project_ID in config.yaml to automaically download the data.

First, check the available fastq data with the terminal command:

bs auth # this needs to be done only once for authentification
bs list project

image info

Next, select the desired project name and ID. In the above config.yaml file, we selected the data from the first entry.

Next, activate the correct environment

conda activate snakemake_darlin # activate the environment

and run the snakemake script at the same directory as the config.yaml file:

snakemake -s $code_directory/snakemake_DARLIN/snakefiles/snakefile_get_data.py --configfile config.yaml --core 1

Matlab-based DARLIN analsysis for both bulk and single-cell libraries

This command will generate the QC report and process each sample with the CARLIN pipeline:

snakemake -s $code_directory/packages/snakemake_DARLIN/snakefiles/snakefile_matlab_DARLIN_Part1.py  --configfile config.yaml --core 10

Finally, you may run this command to get an html report across all samples:

snakemake -s $code_directory/packages/snakemake_DARLIN/snakefiles/snakefile_matlab_DARLIN_Part2.py --configfile config.yaml --core 5 --ri -R generate_report -R plots

The result will show up at the merge_all folder as shown in the above image.

A fast, python-based DARLIN analysis for single-cell libraries

We also developed a fast, python-based pipeline for processing single-cell DARLIN data.It is much faster than the CARLIN pipeline written in Matlab, and is written in python so that it is freely available and the Matlab installation is not required. This is particularly useful for single-cell libraries with higher amplification heterogeneity, e.g., one cell gets 10K reads, while another cell only has 10 reads. We execute a jupyter notebook (QC/single_cell_DARLIN-10x.ipynb or QC/single_cell_DARLIN-scCamellia.ipynb) to obtain the results and also quality control plots simultaneously.

To run this, you need to setup a proper environment, which we may call DARLIN_analysis. Particulary, it requires our in-house package called MosaicLineage as well as cospar

code_directory='.' # change it to the directory where you want to put the packages
cd $code_directory
kernel_name='DARLIN_analysis'
conda create -n $kernel_name python=3.8 --yes
conda activate $kernel_name
pip install cospar
pip install --user ipykernel
pip install pytest black ipywidgets
pip install pytest-datadir pytest-cov umi_tools toolz jupyterlab pyyaml scikit-bio biopython  wand  seaborn==0.11.2  scikit-learn==1.1.1 pandas==1.5.3
python -m ipykernel install --user --name=$kernel_name
pip uninstall cospar # uninstall the old version, and install the latest
cd $code_directory
git clone https://github.com/ShouWenWang-Lab/cospar --depth=1
cd cospar
python setup.py develop
cd $code_directory
git clone https://github.com/ShouWenWang-Lab/MosaicLineage --depth=1
cd MosaicLineage
python setup.py develop
cd $code_directory
git clone https://github.com/ShouWenWang-Lab/snakemake_DARLIN --depth=1
cd snakemake_DARLIN
python setup.py develop

Then, you need to add more parameters in the config.yaml file:

project_name : 'Li_112219'
project_ID : '144505366'
SampleList : ['HSC','MPP','MyP'] #Remove 1_S*, it will have few reads, affect the output
cfg_type : 'sc10xV3' # available protocol: BulkRNA_Tigre_14UMI, BulkRNA_Rosa_14UMI, BulkRNA_12UMI, scCamellia,sc10xV3
template : 'cCARLIN' # short_primer_set: {Tigre_2022_v2, Rosa_v2, cCARLIN}, long_primer_set: {Tigre_2022,Rosa,cCARLIN}
read_cutoff_UMI_override : [3,10] # assume to be a list, UMI cutoff is the same as CB cutoff for single-cell protocol
CARLIN_memory_factor : 300 # request memory at X times the size of the pear fastq file.
sbatch : 1 # 1, run sbatch job;  0, run in the interactive mode. 
CARLIN_max_run_time : 12 # hour
python_DARLIN_pipeline: # This is an extension, needed only if you run snakefile_single_cell_DARLIN.py
    coarse_grained_readcutoff_floor: 5 # the lower bound of the later read count filtering, after denoising, and re-group reads. 
    distance_relative_threshold: 0.03 # 5% error rate, will be multipled with the sequence length
    read_ratio_threshold: 0.6
    seq_3prime_upper_N: 15
    output_folder: 'python_DARLIN'
    kernel: 'DARLIN_analysis'

Finally, run:

snakemake -s $code_directory/packages/snakemake_DARLIN/snakefiles/snakefile_python_DARLIN.py  --configfile config.yaml --core 10

The result will show up as a jupyter notebook and a corresponding html report:

image

Test

To test if the pipeline has been installed correctly, please go to the test folder and run the command

bash test.sh

If everything goes correctly, the expected output for the three test datasets should be like this: image

A log file for running this test module is available to download at here.

Upgrade

Active changes are being made to the github repository. If you want to incorporate the latest changes, please run

cd $code_directory
cd snakemake_DARLIN
git pull
cd ../CARLIN_pipeline/Custom_CARLIN 
git pull
cd ../../MosaicLineage
git pull

Reference

L. Li, S. Bowling, S. E. McGeary, Q. Yu, B. Lemke, K. Alcedo, Y. Jia, X. Liu, M. Ferreira, A. M. Klein, S.-W. Wang, F. D. Camargo, A mouse model with high clonal barcode diversity for joint lineage, transcriptomic, and epigenomic profiling in single cells, Cell (2023). [* corresponding authors]

External links