Dimerization of a ubiquitin variant leads to high affinity interactions with a ubiquitin interacting motif.
Manczyk, N., Veggiani, G., Gish, G.D., Yates, B.P., Ernst, A., Sidhu, S.S., Sicheri, F.(2019) Protein Sci 28: 848-856
- PubMed: 30793400 
- DOI: 10.1002/pro.3593
- Primary Citation of Related Structures:  
6NJG - PubMed Abstract: 
We previously described structural and functional characterization of the first ubiquitin variant (UbV), UbV.v27.1, engineered by phage display to bind with high affinity to a specific ubiquitin interacting motif (UIM). We identified two substitutions relative to ubiquitin (Gly10Val/His68Tyr) that were critical for enhancing binding affinity but could only rationalize the mechanism of action of the Tyr68 substitution ...