408d | pdb_0000408d

STRUCTURAL BASIS FOR RECOGNITION OF A-T AND T-A BASE PAIRS IN THE MINOR GROOVE OF B-DNA

spinqualitylabelsall models 408d, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 408d is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: IPY Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Polyamide dimers containing three types of aromatic rings-pyrrole, imidazole, and hydroxypyrrole-afford a small-molecule recognition code that discriminates among all four Watson-Crick base pairs in the minor groove. The crystal structure of a specific polyamide dimer-DNA complex establishes the structural basis for distinguishing T.A from A.T base pairs. Specificity for the T.A base pair is achieved by means of distinct hydrogen bonds between pairs of substituted pyrroles on the ligand and the O2 of thymine and N3 of adenine. In addition, shape-selective recognition of an asymmetric cleft between the thymine-O2 and the adenine-C2 was observed. Although hitherto similarities among the base pairs in the minor groove have been emphasized, the structure illustrates differences that allow specific minor groove recognition. A structural basis for recognition of A.T and T.A base pairs in the minor groove of B-DNA.,Kielkopf CL, White S, Szewczyk JW, Turner JM, Baird EE, Dervan PB, Rees DC Science. 1998 Oct 2;282(5386):111-5. PMID:9756473 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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