5M2L

Structure of DNA tetrameric AGCGA-quadruplex adopted by 15-mer d(GCGAGGGAGCGAGGG), VK34, oligonucleotide found in regulatory region of the PLEKHG3 human gene

5M2L の概要

• エントリーDOI: 10.2210/pdb5m2l/pdb
• NMR情報: BMRB: 34054
• 分子名称: DNA (5'-D(*GP*CP*GP*AP*GP*GP*GP*AP*GP*CP*GP*AP*GP*GP*G)-3') (1 entity in total)
• 機能のキーワード: agcga-quadruplex, tetramer, agcga-quadruplex family, gaga-quartet, g-g n1-carbonyl symmetric base pair, plekhg3 gene, dna
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 19060.34

構造登録者

Kocman, V.,Plavec, J. (登録日: 2016-10-13, 公開日: 2017-05-31, 最終更新日: 2024-05-15)

主引用文献

Kocman, V.,Plavec, J.
Tetrahelical structural family adopted by AGCGA-rich regulatory DNA regions.
Nat Commun, 8:15355-15355, 2017

PubMed Abstract: Here we describe AGCGA-quadruplexes, an unexpected addition to the well-known tetrahelical families, G-quadruplexes and i-motifs, that have been a focus of intense research due to their potential biological impact in G- and C-rich DNA regions, respectively. High-resolution structures determined by solution-state nuclear magnetic resonance (NMR) spectroscopy demonstrate that AGCGA-quadruplexes comprise four 5'-AGCGA-3' tracts and are stabilized by G-A and G-C base pairs forming GAGA- and GCGC-quartets, respectively. Residues in the core of the structure are connected with edge-type loops. Sequences of alternating 5'-AGCGA-3' and 5'-GGG-3' repeats could be expected to form G-quadruplexes, but are shown herein to form AGCGA-quadruplexes instead. Unique structural features of AGCGA-quadruplexes together with lower sensitivity to cation and pH variation imply their potential biological relevance in regulatory regions of genes responsible for basic cellular processes that are related to neurological disorders, cancer and abnormalities in bone and cartilage development.

PubMed: 28513602
DOI: 10.1038/ncomms15355

実験手法

SOLUTION NMR