High-Resolution Crystal Structures Elucidate the Molecular Basis of Cholera Blood Group Dependence.Heggelund, J.E., Burschowsky, D., Bjrnestad, V.A., Hodnik, V., Anderluh, G., Krengel, U.
(2016) Plos Pathog. 12: e1005567-e1005567
- PubMed: 27082955
- DOI: 10.1371/journal.ppat.1005567
- Primary Citation of Related Structures:
- PubMed Abstract:
Cholera is the prime example of blood-group-dependent diseases, with individuals of blood group O experiencing the most severe symptoms. The cholera toxin is the main suspect to cause this relationship. We report the high-resolution crystal structure ...
Cholera is the prime example of blood-group-dependent diseases, with individuals of blood group O experiencing the most severe symptoms. The cholera toxin is the main suspect to cause this relationship. We report the high-resolution crystal structures (1.1-1.6 Å) of the native cholera toxin B-pentamer for both classical and El Tor biotypes, in complexes with relevant blood group determinants and a fragment of its primary receptor, the GM1 ganglioside. The blood group A determinant binds in the opposite orientation compared to previously published structures of the cholera toxin, whereas the blood group H determinant, characteristic of blood group O, binds in both orientations. H-determinants bind with higher affinity than A-determinants, as shown by surface plasmon resonance. Together, these findings suggest why blood group O is a risk factor for severe cholera.
The National Institute of Chemistry, Ljubljana, Slovenia.,Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.,Department of Chemistry, University of Oslo, Blindern, Norway.