A cavity-forming mutation in insulin induces segmental unfolding of a surrounding alpha-helix.
Xu, B., Hua, Q.X., Nakagawa, S.H., Jia, W., Chu, Y.C., Katsoyannis, P.G., Weiss, M.A.(2002) Protein Sci 11: 104-116
- PubMed: 11742127 
- DOI: 10.1110/ps.32102
- Primary Citation of Related Structures:  
1K3M - PubMed Abstract: 
To investigate the cooperativity of insulin's structure, a cavity-forming substitution was introduced within the hydrophobic core of an engineered monomer. The substitution, Ile(A2)-->Ala in the A1-A8 alpha-helix, does not impair disulfide pairing between chains ...