Table 2.

List of resources for ubiquitination site identification.

Databases	Information	Reference
PhosphositePlus Database	Most comprehensive database for protein ubiquitination including most recent studies	[24]
Protein Lysine Modification Database (PLMD)	Contains information on lysine ubiquitination and on other lysine modifications. Potential for investigating PTM crosstalk	[41]
Mammalian Ubiquitination Site Database (mUbiSiDa)	A database of ubiquitination sites assembled in 2013	[44]
Ubiquitin and Ubiquitin-like conjugation Database (UUCD)	A database of actual and predicted ubiquitin and Ubl associated machinery in several species	[45]