5nkl

Crystal structure of the large fragment of DNA polymerase I from Thermus Aquaticus in a closed ternary complex with the artificial base pair dDs-dPxTP

spinqualitylabelsall models 5nkl, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5nkl is a 3 chain structure with sequence from Thermus aquaticus and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.7Å Ligands: 91N, 91R, 91T, ACT, DOC, GOL, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DPO1_THEAQ Publication Abstract from PubMed Hydrophobic artificial nucleobase pairs without the ability to pair through hydrogen bonds are promising candidates to expand the genetic alphabet. The most successful nucleobase surrogates show little similarity to each other and their natural counterparts. It is thus puzzling how these unnatural molecules are processed by DNA polymerases that have evolved to efficiently work with the natural building blocks. Here, we report structural insight into the insertion of one of the most promising hydrophobic unnatural base pairs, the dDs-dPx pair, into a DNA strand by a DNA polymerase. We solved a crystal structure of KlenTaq DNA polymerase with a modified template/primer duplex bound to the unnatural triphosphate. The ternary complex shows that the artificial pair adopts a planar structure just like a natural nucleobase pair, and identifies features that might hint at the mechanisms accounting for the lower incorporation efficiency observed when processing the unnatural substrates. Structural Basis for Expansion of the Genetic Alphabet with an Artificial Nucleobase Pair.,Betz K, Kimoto M, Diederichs K, Hirao I, Marx A Angew Chem Int Ed Engl. 2017 Sep 18;56(39):12000-12003. doi:, 10.1002/anie.201704190. Epub 2017 Jun 27. PMID:28594080 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also DNA polymerase 3D structures

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