Ubiquitin-activating enzyme E1PDB ID: 1R4N
Several enzymes are needed to recognize obsolete proteins and add ubiquitin to them. This enzyme is similar to E1, the enzyme that activates ubiquitin.
Discussed Structures from Ubiquitin
Walden, H., Podgorski, M.S., Huang, D.T., Miller, D.W., Howard, R.J., Minor, D.L., Holton, J.M., Schulman, B.A. (2003) The structure of the APPBP1-UBA3-NEDD8-ATP complex reveals the basis for selective ubiquitin-like protein activation by an E1. Mol Cell 12: 1427-37