Divergent421

Authors: Nancy Xu

License: MIT

Contributed by: Nancy Xu

Cite as:

Type: None

Postprocessing: None

Trained on: Chromosomes 1, 8, and 21 are test set, 9 is validation set, the remaining data is training data.

Large-scale multi-task convolutional model for predicting chromatin accessility model. Model was trained genome-wide accessibility measures across 421 biosamples (cell lines or tissues) from Roadmap and ENCODE.

Create a new conda environment with all dependencies installed

kipoi env create Divergent421
source activate kipoi-Divergent421

Test the model

kipoi test Divergent421 --source=kipoi

Make a prediction

kipoi get-example Divergent421 -o example
kipoi predict Divergent421 \
  --dataloader_args='{"intervals_file": "example/intervals_file", "fasta_file": "example/fasta_file"}' \
  -o '/tmp/Divergent421.example_pred.tsv'
# check the results
head '/tmp/Divergent421.example_pred.tsv'

Create a new conda environment with all dependencies installed

kipoi env create Divergent421
source activate kipoi-Divergent421

Get the model

import kipoi
model = kipoi.get_model('Divergent421')

Make a prediction for example files

pred = model.pipeline.predict_example(batch_size=4)

Use dataloader and model separately

# Download example dataloader kwargs
dl_kwargs = model.default_dataloader.download_example('example')
# Get the dataloader and instantiate it
dl = model.default_dataloader(**dl_kwargs)
# get a batch iterator
batch_iterator = dl.batch_iter(batch_size=4)
for batch in batch_iterator:
    # predict for a batch
    batch_pred = model.predict_on_batch(batch['inputs'])

Make predictions for custom files directly

pred = model.pipeline.predict(dl_kwargs, batch_size=4)

Get the model

library(reticulate)
kipoi <- import('kipoi')
model <- kipoi$get_model('Divergent421')

Make a prediction for example files

predictions <- model$pipeline$predict_example()

Use dataloader and model separately

# Download example dataloader kwargs
dl_kwargs <- model$default_dataloader$download_example('example')
# Get the dataloader
dl <- model$default_dataloader(dl_kwargs)
# get a batch iterator
it <- dl$batch_iter(batch_size=4)
# predict for a batch
batch <- iter_next(it)
model$predict_on_batch(batch$inputs)

Make predictions for custom files directly

pred <- model$pipeline$predict(dl_kwargs, batch_size=4)

Get the docker image

docker pull kipoi/kipoi-docker:sharedpy3keras1.2-slim

Get the full sized docker image

docker pull kipoi/kipoi-docker:sharedpy3keras1.2

Get the activated conda environment inside the container

docker run -it kipoi/kipoi-docker:sharedpy3keras1.2-slim

Test the model

docker run kipoi/kipoi-docker:sharedpy3keras1.2-slim kipoi test Divergent421 --source=kipoi

Make prediction for custom files directly

# Create an example directory containing the data
mkdir -p $PWD/kipoi-example 
# You can replace $PWD/kipoi-example with a different absolute path containing the data 
docker run -v $PWD/kipoi-example:/app/ kipoi/kipoi-docker:sharedpy3keras1.2-slim \
kipoi get-example Divergent421 -o /app/example 
docker run -v $PWD/kipoi-example:/app/ kipoi/kipoi-docker:sharedpy3keras1.2-slim \
kipoi predict Divergent421 \
--dataloader_args='{'intervals_file': '/app/example/intervals_file', 'fasta_file': '/app/example/fasta_file'}' \
-o '/app/Divergent421.example_pred.tsv' 
# check the results
head $PWD/kipoi-example/Divergent421.example_pred.tsv

Install apptainer

https://apptainer.org/docs/user/main/quick_start.html#quick-installation-steps

Make prediction for custom files directly

kipoi get-example Divergent421 -o example
kipoi predict Divergent421 \
--dataloader_args='{"intervals_file": "example/intervals_file", "fasta_file": "example/fasta_file"}' \
-o 'Divergent421.example_pred.tsv' \
--singularity 
# check the results
head Divergent421.example_pred.tsv

Schema

Inputs

Single numpy array

Name: None

Shape: (1000, 4)

Doc: 1000 base pair sequence of one-hot encoding ACGT

Targets

Single numpy array

Name: None

Shape: (421,)

Doc: Binary 0/1 output for chromatin accessibility in the designated range. 0 = inaccessible, 1 = accessible.

Dataloader

Defined as: kipoiseq.dataloaders.SeqIntervalDl

Doc: Dataloader for a combination of fasta and tab-delimited input files such as bed files. The dataloader extracts regions from the fasta file as defined in the tab-delimited `intervals_file` and converts them into one-hot encoded format. Returned sequences are of the type np.array with the shape inferred from the arguments: `alphabet_axis` and `dummy_axis`.

Authors: Ziga Avsec , Roman Kreuzhuber

Type: Dataset

License: MIT

Arguments

intervals_file : bed3+<columns> file path containing intervals + (optionally) labels

fasta_file : Reference genome FASTA file path.

num_chr_fasta (optional): True, the the dataloader will make sure that the chromosomes don't start with chr.

label_dtype (optional): None, datatype of the task labels taken from the intervals_file. Example: str, int, float, np.float32

use_strand (optional): reverse-complement fasta sequence if bed file defines negative strand. Requires a bed6 file

ignore_targets (optional): if True, don't return any target variables

Model dependencies

conda:

h5py=2.10.0
tensorflow<=1.4.1
keras=1.2.2
bioconda::pysam=0.15.3
bioconda::kipoiseq
python=3.6.15
pip=21.3

pip:

Dataloader dependencies

conda:

bioconda::pybedtools
bioconda::pyfaidx
bioconda::pyranges
numpy
pandas

pip:

kipoiseq