Download MendeleyHigh-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: https://doi.org/10.1371/journal.ppat.1005567
- Primary Citation of Related Structures:
5ELB, 5ELC, 5ELD, 5ELE, 5ELF - 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 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.
Organizational Affiliation:
Department of Chemistry, University of Oslo, Blindern, Norway.
