The existence of multiple conformers of interleukin-21 directs engineering of a superpotent analogue.
Bondensgaard, K., Breinholt, J., Madsen, D., Omkvist, D.H., Kang, L., Worsaae, A., Becker, P., Schiodt, C.B., Hjorth, S.A.(2007) J Biol Chem 282: 23326-23336
- PubMed: 17565991 
- DOI: 10.1074/jbc.M701313200
- Primary Citation of Related Structures:  
2OQP - PubMed Abstract: 
The high resolution three-dimensional structure of human interleukin (hIL)-21 has been resolved by heteronuclear NMR spectroscopy. Overall, the hIL-21 structure is dominated by a well defined central four-helical bundle, arranged in an up-up-down-down topology, as observed for other cytokines ...