Sugar-binding proteins, or lectins, are ubiquitous molecules. Lectins are involved in many types of interaction, which are of first importance in the social life of many cells. The structure of lectins have been extensively studied using X-ray diffractometry, NMR and molecular modeling.

About one hundred of 3D-structures are now available for lectins. About half of them crystallized in the complexed form, therefore allowing atomic level studies of the interaction between protein and sugars.

The present database offers an extensive list of the known 3D-structures of lectins. The different families have been classified based upon their fold. Useful links allow to reach bibliographic information, and also atomic coordinates at the PDB and other protein databanks with structural information. Images are provided to illustrate the beauties of protein/carbohydrate interactions.

It is the hope of the authors that glycobiologists will enjoy traveling through this collection.