SPONGE: Simple Prior Omics Network GEnerator

Gene regulatory networks modelled from experimental data can be improved through the use of prior biological knowledge on e.g. transcription factor binding. There are several tools that utilise this information. However, the prior networks used with them are often not updated and may fail to reflect the most up-to-date information. Here we present SPONGE, a Python module designed to access information across biological databases, chiefly JASPAR and STRING, to model two types of networks—a prior gene regulatory network mapping transcription factors to genes based on their predicted binding sites, and a prior protein-protein interaction network mapping potential interactions between transcription factors. SPONGE is mainly designed to work with the PANDA algorithm and the corresponding NetZoo family of tools. However, the networks are provided in an easily adaptable format for other tools. SPONGE was designed with ease of use in mind, and it provides sensible default values for all of its parameters while giving the users freedom to fine-tune them. The code for the Python module and the documentation can be found in our GitHub repository .