A zinc clasp structure tethers Lck to T cell coreceptors CD4 and CD8.
Kim, P.W., Sun, Z.Y., Blacklow, S.C., Wagner, G., Eck, M.J.(2003) Science 301: 1725-1728
- PubMed: 14500983 
- DOI: 10.1126/science.1085643
- Primary Citation of Related Structures:  
1Q68, 1Q69 - PubMed Abstract: 
The T cell coreceptors CD4 and CD8 both associate via their cytoplasmic tails with the N-terminus of the Src-family tyrosine kinase Lck. These interactions require zinc and are critical for T cell development and activation. We examined the folding and solution structures of ternary CD4-Lck-Zn2+ and CD8alpha-Lck-Zn2+ complexes ...