AMPcombi : AntiMicrobial Peptides parsing and functional classification tool

This tool parses the results of antimicrobial peptide (AMP) prediction tools into a single table and aligns the hits against a reference AMP database for functional classifications.

For parsing: AMPcombi is developed to parse the output of these AMP prediction tools:

For classification: AMPcombi is developed to offer functional annotation of the detected AMPs by alignment to an AMP reference databases, for e.g.,:

Alignment to the reference database is done using diamond blastp v.2.0.15

======================

Installation

======================

To install AMPcombi:

Add dependencies of the tool; python > 3.0, biopython, pandas and diamond. Installation can be done using:

• pip installation

pip install AMPcombi

• git repository

git clone https://github.com/Darcy220606/AMPcombi.git

• conda

conda env create -f ampcombi/environment.yml

or

 conda install -c bioconda AMPcombi

======================

Usage:

======================

There are two basic commands to run AMPcombi:

1. Using --amp_results

ampcombi \
--amp_results path/to/my/result_folder/ \
--faa path/to/sample_faa_files/

Here the head folder containing output files has to be given. AMPcombi finds and summarizes the output files from different tools, if the folder is structured and named as: /result_folder/toolsubdir/samplesubdir/sample.tool.filetype.

• Note that the filetype ending might vary and can be specified with --tooldict, if it is different from the default. When passing a dictionary via command line, this has to be done as a string with single quotes ' ' and the dictionary keys and items with double quotes " ". i.e. '{"key1":"item1", "key2":"item2"}'
• Note that --sample_list can also be given if only specfic samples are needed from the driectory.

The path to the folder containing the respective protein fasta files has to be provided with --faa. The files have to be named with <samplename>.faa.

Structure of the results folder:

amp_results/
├── tool_1/
|   ├── sample_1/
|   |   └── sample_1.tool_1.tsv
|   └── sample_2/
|   |   └── sample_2.tool_1.tsv
├── tool_2/
|   ├── sample_1/
|   |   └── sample_1.tool_2.txt
|   └── sample_2/
|   |   └── sample_2.tool_2.txt
├── tool_3/
    ├── sample_1/
    |   └── sample_1.tool_3.predict
    └── sample_2/
        └── sample_2.tool_3.predict

2. Using --path_list and --sample_list

ampcombi \
--path_list path_to_sample_1_tool_1.csv path_to_sample_1_tool_1.csv \
--path_list path_to_sample_2_tool_1.csv path_to_sample_2_tool_1.csv \
--sample_list sample_1 sample_2 \
--faa path/to/sample_faa_files/

Here the paths to the output-files to be summarized can be given by --path_list for each sample. Together with this option a list of sample-names has to be supplied. Either the path to the folder containing the respective protein fasta files has to be provided with --faa or, in case of only one sample, the path to the corresponding .faa file. The files have to be named with <samplename>.faa.

Input options:

• Note: The fasta file corresponding to the AMP database should not contain any characters other than ['A','C','D','E','F','G','H','I','K','L','M','N','P','Q','R','S','T','V','W','Y']
• Note: The reference database table should be tab delimited.

Output:

The output will be written into your working directory, containing the following files and folders:

<pwd>/
├── amp_ref_database/
|   ├── amp_ref.dmnd
|   ├── general_amps_<DATE>_clean.fasta
|   └── general_amps_<DATE>.tsv
├── sample_1/
|   ├── sample_1_amp.faa
|   ├── sample_1_ampcombi.csv
|   └── sample_1_diamond_matches.txt
├── sample_2/
|   ├── sample_2_amp.faa
|   ├── sample_2_ampcombi.csv
|   └── sample_2_diamond_matches.txt
├── AMPcombi_summary.csv
├── AMPcombi_summary.html
└── ampcombi.log

======================

Contribution:

======================

AMPcombi is a tool developed for parsing results from published AMP prediction tools. We therefore welcome fellow contributors who would like to add new AMP prediction tools results for parsing and alignment.

Adding a new tool to AMPcombi

In ampcombi/reformat_tables.py

• add a new tool function to read the output to a pandas dataframe and return two columns named contig_id and prob_<toolname>
• add the new function to the read_path function

In ampcombi/main.py

• add your default tool:tool.fileending to the default of --tooldict

======================

Authors: @louperelo and @darcy220606