Multivalent Calixarene Complexation of a Designed Pentameric Lectin.
Flood, R.J., Cerofolini, L., Fragai, M., Crowley, P.B.(2024) Biomacromolecules 25: 1303-1309
- PubMed: 38227741 
- DOI: https://doi.org/10.1021/acs.biomac.3c01280
- Primary Citation of Related Structures:  
8R3B, 8R3C, 8R3D - PubMed Abstract: 
We describe complex formation between a designed pentameric β-propeller and the anionic macrocycle sulfonato-calix[8]arene ( sclx 8 ), as characterized by X-ray crystallography and NMR spectroscopy. Two crystal structures and 15 N HSQC experiments reveal a single calixarene binding site in the concave pocket of the β-propeller toroid. Despite the symmetry mismatch between the pentameric protein and the octameric macrocycle, they form a high affinity multivalent complex, with the largest protein-calixarene interface observed to date. This system provides a platform for investigating multivalency.
Organizational Affiliation: 
SSPC, Science Foundation Ireland Research Centre for Pharmaceuticals, School of Biological and Chemical Sciences, University of Galway, University Road, Galway H91 TK33, Ireland.