Table 1.

Comparison with other PPI prediction databases

	PrePPI [16]	HOMCOS [17]	PRISM [28]	Interactome3D [29]	MEGADOCK-Web
Number of PPI predictions	1,350,000	–	30,475	227,815	28,331,628
Comprehensive PPI prediction					✓
Search a single protein query	✓		✓	✓	✓
Search a pair protein query	✓	✓	✓	✓	✓
Viewing of multiple modeled complex structures		✓	✓	✓	✓
Mapping biochemical pathways				✓	✓
Template-free PPI prediction					✓

The numbers of archived PPI predictions as of June 1, 2017 are shown. Because HOMCOS is an on-demand prediction server, the number of PPI predictions is shown as ‘-’. ‘✓’ and blank cells indicate enable and disable