8tam

Sequence specific (AATT) orientation of Hoechst molecules at two unique minor groove binding sites within a self-assembled 3D DNA lattice (4x6)

spinqualitylabelsall models 8tam, resolution 2.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8tam is a 4 chain structure with sequence from Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.95Å Ligands: CO, HT1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The structural analysis of guest molecules in rationally designed and self-assembling DNA crystals has proven an elusive goal since its conception. Oligonucleotide frameworks provide an especially attractive route toward studying DNA-binding molecules by using three-dimensional lattices with defined sequence and structure. In this work, we site-specifically position a suite of minor groove binding molecules, and solve their structures via X-ray crystallography as a proof-of-principle toward scaffolding larger guest species. Two crystal motifs were used to precisely immobilize the molecules DAPI, Hoechst, and netropsin at defined positions in the lattice, allowing us to control occupancy within the crystal. We also solved the structure of a three-ring imidazole-pyrrole-pyrrole polyamide molecule, which sequence-specifically packs in an antiparallel dimeric arrangement within the minor groove. Finally, we engineered a crystal designed to position both netropsin and the polyamide at two distinct locations within the same lattice. Our work elucidates the design principles for the spatial arrangement of functional guests within lattices and opens new potential opportunities for the use of DNA crystals to display and structurally characterize small molecules, peptides, and ultimately proteins of unknown structure. Site-Specific Arrangement and Structure Determination of Minor Groove Binding Molecules in Self-Assembled Three-Dimensional DNA Crystals.,Simmons CR, Buchberger A, Henry SJW, Novacek A, Fahmi NE, MacCulloch T, Stephanopoulos N, Yan H J Am Chem Soc. 2023 Dec 6;145(48):26075-26085. doi: 10.1021/jacs.3c07802. Epub , 2023 Nov 21. PMID:37987645 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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