P4PC: A Portal for Bioinformatics Resources of piRNAs and circRNAs

Background: PIWI-interacting RNAs (piRNAs) and circular RNAs (circRNAs) are two kinds of non-coding RNAs (ncRNAs) that play important roles in epigenetic regulation, transcriptional regulation, post-transcriptional regulation of many biological processes. Although there exist various resources, it is still challenging to select such resources for specific research projects on ncRNAs. Methods: In order to facilitate researchers in finding the appropriate bioinformatics sources for studying ncRNAs, we created a novel portal named P4PC that provides computational tools and data sources of piRNAs and circRNAs. Results: 249 computational tools, 126 databases and 420 papers are manually curated in P4PC. All entries in P4PC are classified in 5 groups and 26 subgroups. The list of resources is summarized in the first page of each group. Conclusion: According to their research proposes, users can quickly select proper resources for their research projects by viewing detail information and comments in P4PC. Database URL is http://www.ibiomedical.net/Portal4PC/ and https://43.138.46.5/Portal4PC/.