6t1d | pdb_00006t1d

Pleurotus Ostreatus Lectin (POL), compelx with melibiose

spinqualitylabelsall models 6t1d, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6t1d is a 6 chain structure with sequence from Oyster mushroom. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, GLC, GLA Related: 6t0q Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Pleurotus ostreatus Lectin (POL) is a 353 amino acid chain lectin that can be purified from the fruiting bodies of the very well-known and widely diffused edible oyster mushrooms (Pleurotus ostreatus). The lectin has been partially characterized by different groups and, although it was crystallized about 20 years ago, its three-dimensional structure and the details of its interactions with carbohydrates are still unknown. This paper reports the three-dimensional structure and ligand-binding properties of POL. We have determined the X-ray structure of the apo-protein purified from the fruiting bodies of the mushroom and that of the recombinant protein in complex with melibiose to a resolution of about 2 A. The lectin is a homodimer in which the two polypeptide chains are linked by a disulfide bridge. A POL monomer is composed of two highly homologous beta-jellyroll domains each of which containing a calcium-dependent carbohydrate binding site. A high degree of sequence similarity is observed between the two carbohydrate binding modules present in each monomer. The structure of the lectin in complex with melibiose reveals that a POL dimer has four calcium dependent carbohydrate-binding sites. The interaction with sugars in solution has been characterized by ITC and Saturation transfer difference (STD) NMR and it sheds new light on the molecular determinants of POL specificity. The lectin exhibits in vitro antiproliferative effects against human cancer cell lines and presents structural similarity with the prototype member of the CBM67 family, the non-catalytic domain of Streptomyces avermitilis alpha-Rhamnosidase. Structure and properties of the oyster mushroom (Pleurotus ostreatus) lectin (POL).,Perduca M, Destefanis L, Bovi M, Galliano M, Munari F, Assfalg M, Ferrari F, Monaco HL, Capaldi S Glycobiology. 2020 Jan 27. pii: 5716261. doi: 10.1093/glycob/cwaa006. PMID:31985778 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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