Structure of S-lectin, a developmentally regulated vertebrate beta-galactoside-binding protein.
收藏PubMed Central1994-02-15 更新2026-05-16 收录
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https://pmc.ncbi.nlm.nih.gov/articles/PMC43172/
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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. IMAGES:
提供机构：
National Academy of Sciences
创建时间：
1994-02-15
