School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
Laboratoire de Biologie Structurale de la Cellule (BIOC), Ecole Polytechnique, CNRS-UMR7654, Institut Polytechnique de Paris, Palaiseau 91128, France.
Chem Commun (Camb). 2021 Mar 9;57(20):2527-2530. doi: 10.1039/d0cc08146a.
A recent study on the left-handed G-quadruplex (LHG4) DNA revealed a 12-nt minimal motif GTGGTGGTGGTG with the ability to independently form an LHG4 and to drive an adjacent sequence to LHG4 formation. Here we have identified a second LHG4-forming motif, GGTGGTGGTGTG, and determined the X-ray crystal structure of an LHG4 involving this motif. Our structural analysis indicated the role of split guanines and single thymine loops in promoting LHG4 formation.
最近一项关于左手 G-四链体 (LHG4) DNA 的研究揭示了一个具有独立形成 LHG4 能力并能驱动邻近序列形成 LHG4 的 12 个核苷酸最小基序 GTGGTGGTGGTG。在这里,我们确定了第二个形成 LHG4 的基序 GGTGGTGGTGTG,并测定了涉及该基序的 LHG4 的 X 射线晶体结构。我们的结构分析表明,分裂的鸟嘌呤和单个胸腺嘧啶环在促进 LHG4 形成方面发挥了作用。