1jo2

Crystal Structure of the B-DNA Hexamer (CgATCG).Daunomycin Complex Containing a Ribose at the Intercalation Site

spinqualitylabelsall models 1jo2, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1jo2 is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: DM1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The crystal structure of a DNA/RNA chimera (dC)(rG)d(ATCG) complexed with the anticancer drug daunomycin has been determined at 1.5 A resolution with R(work) and R(free) of 19.7 and 23.3%, respectively, for 2767 reflections. The complex crystallizes in space group P4(1)2(1)2, with unit-cell parameters a = b = 28.05, c = 53.16 A, and contains one nucleic acid strand and one daunomycin molecule in the asymmetric unit. To our knowledge, this is the first crystal structure of a DNA/RNA chimera complexed with an intercalating drug. The DNA/RNA chimera adopts the B-form helical conformation, with the 2'-hydroxyl group in the major groove of the duplex, forming hydrogen bonds to N7 and the anionic phosphate oxygen of its 3'-side adenine. The present results indicate that the replacement by the ribose sugar in the DNA sequence does not change the geometry and intercalation pattern of daunomycin. A model of B-form RNA has been built based on the present structure. The model indicates that the interactions of the 2'-hydroxyl groups in the B-form duplex depend on their 3'-side nucleotides. Structure of a B-form DNA/RNA chimera (dC)(rG)d(ATCG) complexed with daunomycin at 1.5 A resolution.,Shi K, Pan B, Sundaralingam M Acta Crystallogr D Biol Crystallogr. 2003 Aug;59(Pt 8):1377-83. Epub 2003, Jul 23. PMID:12876339 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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