4m3y | pdb_00004m3y

RB69 DNA polymerase ternary complex with dG/dT at position n-1 of primer/template duplex

spinqualitylabelsall models 4m3y, resolution 1.86Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4m3y is a 3 chain structure with sequence from Escherichia phage RB69. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ATP, CA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DPOL_BPR69 This polymerase possesses two enzymatic activities: DNA synthesis (polymerase) and an exonucleolytic activity that degrades single stranded DNA in the 3'- to 5'-direction. Publication Abstract from PubMed Recent structures of DNA polymerase complexes with dGMPCPP/dT and dCTP/dA mispairs at the insertion site have shown that they adopt Watson-Crick geometry in the presence of Mn2+ indicating that the tautomeric or ionization state of the base has changed. To see whether the tautomeric or ionization state of base-pair could be affect by its microenvironment, we determined ten structures of an RB69 DNA polymerase quadruple mutant with dG/dT or dT/dG mispairs at position n-1 to n-5 of the Primer/Template duplex. Different shapes of the mispairs, including Watson-Crick geometry, have been observed, strongly suggesting that the local environment of base-pairs plays an important role in their tautomeric or ionization states. Mispairs with Watson-Crick Base-pair Geometry Observed in Ternary Complexes of an RB69 DNA Polymerase Variant.,Xia S, Konigsberg WH Protein Sci. 2014 Jan 24. doi: 10.1002/pro.2434. PMID:24458997 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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