Loading
PDBj
MenuPDBj@FacebookPDBj@X(formerly Twitter)PDBj@BlueSkyPDBj@YouTubewwPDB FoundationwwPDBDonate
RCSB PDBPDBeBMRBAdv. SearchSearch help

4AGR

Structure of a tetrameric galectin from Cinachyrella sp. (Ball sponge)

Summary for 4AGR
Entry DOI10.2210/pdb4agr/pdb
Related4AGG 4AGV
DescriptorGALECTIN, CHLORIDE ION (3 entities in total)
Functional Keywordssugar binding protein
Biological sourceCINACHYRELLA
Total number of polymer chains4
Total formula weight64331.81
Authors
Freymann, D.M.,Focia, P.J.,Sakai, R.,Swanson, G.T. (deposition date: 2012-01-31, release date: 2012-08-29, Last modification date: 2024-11-13)
Primary citationFreymann, D.M.,Nakamura, Y.,Focia, P.J.,Sakai, R.,Swanson, G.T.
Structure of a Tetrameric Galectin from Cinachyrella Sp. (Ball Sponge).
Acta Crystallogr.,Sect.D, 68:1163-, 2012
Cited by
PubMed Abstract: The galectins are a family of proteins that bind with highest affinity to N-acetyllactosamine disaccharides, which are common constituents of asparagine-linked complex glycans. They play important and diverse physiological roles, particularly in the immune system, and are thought to be critical metastatic agents for many types of cancer cells, including gliomas. A recent bioactivity-based screen of marine sponge (Cinachyrella sp.) extract identified an ancestral member of the galectin family based on its unexpected ability to positively modulate mammalian ionotropic glutamate receptor function. To gain insight into the mechanistic basis of this activity, the 2.1 Å resolution X-ray structure of one member of the family, galectin CchG-1, is reported. While the protomer exhibited structural similarity to mammalian prototype galectin, CchG-1 adopts a novel tetrameric arrangement in which a rigid toroidal-shaped 'donut' is stabilized in part by the packing of pairs of vicinal disulfide bonds. Twofold symmetry between binding-site pairs provides a basis for a model for interaction with ionotropic glutamate receptors.
PubMed: 22948917
DOI: 10.1107/S0907444912022834
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2.1 Å)
Structure validation

229183

PDB entries from 2024-12-18

PDB statisticsPDBj update infoContact PDBjnumon