Download MendeleyStructure of S-lectin, a developmentally regulated vertebrate beta-galactoside-binding protein.
Liao, D.I., Kapadia, G., Ahmed, H., Vasta, G.R., Herzberg, O.(1994) Proc Natl Acad Sci U S A 91: 1428-1432
- PubMed: 8108426
- DOI: https://doi.org/10.1073/pnas.91.4.1428
- Primary Citation of Related Structures:
1SLT - PubMed Abstract:
The crystal structure of a 14-kDa bovine spleen S-lectin complexed with the disaccharide N-acetyllactosamine at 1.9-A resolution reveals a surprising structural relationship to legume lectins, despite the lack of sequence homology. Two monomers associate to form an extended beta-sandwich, each with the same jelly roll topology typical of legume lectins but with dramatically trimmed loops and with different dimer association. Each monomer binds one N-acetyllactosamine molecule in a topologically and spatially different site than that of legume lectins. The carbohydrate-binding site provides an unprecedented paradigm for carbohydrate binding, with a unique network of salt bridges. The specificity for beta-galactose arises from intricate interactions that constrain the position of the O4 atom.
Organizational Affiliation:
Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, Rockville 20850.
