Primary Citation of Related Structures: 1JZN, 1MUQ
PubMed Abstract:
Rattlesnake venom lectin (RSL) from the western diamondback rattlesnake (Crotalus atrox) is an oligomeric galactose-specific C-type lectin. The X-ray crystal structure of RSL, in complex with lactose and thiodigalactoside, at 2.2 and 2.3 A resolution, respectively, reveals a decameric protein composed of two 5-fold symmetric pentamers arranged in a staggered, back-to-back orientation ...
Rattlesnake venom lectin (RSL) from the western diamondback rattlesnake (Crotalus atrox) is an oligomeric galactose-specific C-type lectin. The X-ray crystal structure of RSL, in complex with lactose and thiodigalactoside, at 2.2 and 2.3 A resolution, respectively, reveals a decameric protein composed of two 5-fold symmetric pentamers arranged in a staggered, back-to-back orientation. Each monomer corresponds to a single canonical C-type lectin carbohydrate recognition domain devoid of accessory domains and is disulfide-bonded to a monomer in the other pentamer. The structure is the first example of that of a carbohydrate complex of a vertebrate galactose-specific C-type lectin. The 10 carbohydrate-binding sites, located on the rim of the decamer, suggest a role for multivalent interactions and a mechanism for RSL's ability to promote receptor cross-linking and cell aggregation.
Related Citations:
Isolation and characterization of three Ca2+-dependent beta-galactoside-specific lectins from snake venoms Gartner, T.K., Ogilvie, M.L. (1984) Biochem J 224: 301
Complete primary structure of a galactose-specific lectin from the venom of the rattlesnake Crotalus atrox.
Homologies with Ca2(+)-dependent-type lectins Hirabayashi, J.T., Kusunoki, T., Kasai, K. (1991) J Biol Chem 266: 2320
Organizational Affiliation:
Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
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