121d | pdb_0000121d

MOLECULAR STRUCTURE OF THE A-TRACT DNA DODECAMER D(CGCAAATTTGCG) COMPLEXED WITH THE MINOR GROOVE BINDING DRUG NETROPSIN

spinqualitylabelsall models 121d, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 121d is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The molecular structure of the complex between the minor groove binding drug netropsin and the dodecamer d(CGCAAATTTGCG) has been solved and refined by X-ray diffraction analysis to an R-factor of 19.8% and 2.2-A resolution. The drug lies in the narrow minor groove of the B-DNA fragment, covering five of the six A.T base pairs (from A5.T20 to T9.A16). The long six A.T base pair tract allows the drug to bind in a position that optimizes its contacts with the DNA, establishing hydrogen bonds with O2 of thymines and N3 of adenines. The DNA molecule shows a high propeller twist only at the A6.T19 step of the A-tract. Two three-centered hydrogen bonds are observed in the major groove at half of the A-tract. Molecular structure of the A-tract DNA dodecamer d(CGCAAATTTGCG) complexed with the minor groove binding drug netropsin.,Tabernero L, Verdaguer N, Coll M, Fita I, van der Marel GA, van Boom JH, Rich A, Aymami J Biochemistry. 1993 Aug 24;32(33):8403-10. PMID:8395202 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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