Thermodynamic and structural consequences of flexible loop deletion by circular permutation in the streptavidin-biotin system.
Chu, V., Freitag, S., Le Trong, I., Stenkamp, R.E., Stayton, P.S.(1998) Protein Sci 7: 848-859
- PubMed: 9568892 
- DOI: 10.1002/pro.5560070403
- Primary Citation of Related Structures:  
1SWF, 1SWG - PubMed Abstract: 
A circularly permuted streptavidin (CP51/46) has been designed to remove the flexible polypeptide loop that undergoes an open to closed conformational change when biotin is bound. The original termini have been joined by a tetrapeptide linker, and four loop residues have been removed, resulting in the creation of new N- and C-termini ...