7e4e | pdb_00007e4e

NMR solution structures of DNA minidumbbell containing a N1-methyladenine

spinqualitylabelsall models 7e4e, 5 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7e4e is a 1 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NA NonStd Res: MA7 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed DNA methylation is a prevalent regulatory modification in prokaryotes and eukaryotes. N(1)-methyladenine (m(1)A) and N(6)-methyladenine (m(6)A) have been found to be capable of altering DNA structures via disturbing Watson-Crick base pairing. However, little has been known about their influences on non-B DNA structures, which are associated with genetic instabilities. In this work, we investigated the effects of m(1)A and m(6)A on both the structure and thermodynamic stability of a newly reported DNA minidumbbell formed by two TTTA tetranucleotide repeats. As revealed by the results of nuclear magnetic resonance spectroscopic studies, both m(1)A and m(6)A favored the formation of a T.m(1)A and T.m(6)A Hoogsteen base pair, respectively. More intriguingly, the m(1)A and m(6)A modifications brought about stabilization and destabilization effects on the DNA minidumbbell, respectively. This work provides new biophysical insights into the effects of adenine methylation on the structure and thermodynamic stability of DNA. Effects of Adenine Methylation on the Structure and Thermodynamic Stability of a DNA Minidumbbell.,Wan L, Lam SL, Lee HK, Guo P Int J Mol Sci. 2021 Mar 31;22(7). pii: ijms22073633. doi: 10.3390/ijms22073633. PMID:33807305 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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