1uln

Crystal Structure of Pokeweed Lectin-D1

spinqualitylabelsall models 1uln, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1uln is a 1 chain structure with sequence from Phytolacca americana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.65Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LED2_PHYAM N-acetyl-D-glucosamine binding lectin. Shows no hemagglutinating activity towards rabbit erythrocytes and weak activity towards trypsin-treated erythrocytes. Has mitogenic activity towards human peripheral blood lymphocytes (HPBL). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Pokeweed lectin (PL), a lectin specific for N-acetylglucosamine-containing saccharides, stimulates peripheral lymphocytes to undergo mitosis by binding to their cell surfaces. Four types of lectins have been isolated from the roots of pokeweed (Phytolacca americana) and shown to contain homologous domains but to have different molecular sizes and biological properties. PL-D, the smallest lectin in the group, has two isolectins, PL-D1 and PL-D2. PL-D1 consists of 84 amino-acid residues, while PL-D2 is identical to PL-D1 in sequence except for the lack of two C-terminal residues, Leu83 and Thr84. The crystal structures of PL-D1 and PL-D2 were solved by the molecular-replacement method and refined to 1.65 and 1.5 A resolution with R factors of 17.2 and 17.6%, respectively. The PL-Ds are composed of two repetitive chitin-binding domains, each of which has four S-S bridges and one putative carbohydrate-binding site. The two carbohydrate-binding sites in PL-D are located on one side of the molecule. The relative orientation of the two domains in PL-D1 differs from that in PL-D2. Two C-terminal residues of PL-D1 are invisible in the present crystal structure, indicating the flexibility of the region. PL-D2 has a Ca2+ ion bound to the C-terminus on the molecular surface. A wide distribution of acidic residues is characteristically observed on one side of the C-terminal region of PL-D. Structures of two lectins from the roots of pokeweed (Phytolacca americana).,Fujii T, Hayashida M, Hamasu M, Ishiguro M, Hata Y Acta Crystallogr D Biol Crystallogr. 2004 Apr;60(Pt 4):665-73. Epub 2004, Mar 23. PMID:15039554 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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