Table 1. Summary of SomamiR 2.0 contents*.

Database Contents	Version/Counts
Genome build	GRCH 38
Somatic mutations in pre-miRNA sequences	1779
Somatic mutations in mature miRNA sequences	644
Somatic mutations in miRNA seeds	181
Somatic mutations (records) in experimentally identified miRNA target sites	388 247 (512 047)
Somatic mutations (records) in predicted miRNA target sites	96 181 (2 868 677)
Biological pathways impacted by somatic mutation in miRNA target sites	199
Cancer-associated genes with somatic mutations in their miRNA target sites	3049
Types of cancers	620

*The numbers in the parentheses are the counts of database records for somatic mutations in miRNA target sites. A record consists of a miRNA, a target site of the miRNA and a somatic mutation in the target site. Multiple miRNAs may share same target sites or have overlapping target sites.