Ubiquitination is one of the most abundant forms of PTM in all living organisms, which is important for the mainstream of all biological and cellular processes. For example, signal transduction pathways, DNA repair, and protein degradation. Some of the ubiquitination pathways are related with many cancers, such as gastric cancer, leukaemia, and lung cancer. According to such serious issue, Several databases has been published by computational researchers, so that we have compiled all of those databases into one simple and friendly forum for the scientific community