High-Resolution Three-Dimensional NMR Structure Of The KRAS Proto-Oncogene Promoter Reveals Key Features Of A G-Quadruplex Involved In Transcriptional Regulation [PDF]
, 2017 Non-canonical base pairing within guanine-rich DNA and RNA sequences can produce G-quartets, whose stacking leads to the formation of a G-quadruplex (G4).
Ivashchenko, S. +5 more
core +2 more sources
Advanced Science, EarlyView.Calhm6 drives M2 macrophage polarization via the Chp1‐Camk4‐Creb1 axis, suppressing inflammation through calcium‐dependent ectosomal delivery. Calhm6 deficiency enhances M1 responses, boosting bactericidal activity but exacerbating tissue damage. LPS/IFNγ upregulate Calhm6 via Irf1, while IL‐4/Stat6 inhibits it, balancing immune outcomes.
Yanlong Xin +14 more
wiley +1 more source
Metal-ion binding and metal-ion induced folding of the adenine-sensing riboswitch aptamer domain [PDF]
, 2010 Divalent cations are important in the folding and stabilization of complex RNA structures. The adenine-sensing riboswitch controls the expression of mRNAs for proteins involved in purine metabolism by directly sensing intracellular adenine levels ...
Noeske, Jonas +2 more
core
Kilohertz laser ablation for doping helium nanodroplets
, 2007 A new setup for doping helium nanodroplets by means of laser ablation at kilohertz repetition rate is presented. The doping process is characterized and two distinct regimes of laser ablation are identified.
B. Forkl +6 more
core +1 more source
Tomato EF-Tsmt, a functional mitochondrial translation elongation factor from higher plants [PDF]
, 2003 Ethylene-induced ripening in tomato (Lycopersicon esculentum) resulted in the accumulation of a transcript designated LeEF-Tsmt that encodes a protein with significant homology to bacterial Ts translational elongation factor (EF-Ts).
Benichou, Mohamed +10 more
core +1 more source
Advanced Science, EarlyView.FOXQ1 emerges as a master transcriptional regulator of brain endothelial metabolism, orchestrating mitochondrial function through dual control of calcium signaling and cristae organization. This study reveals that brain endothelial cells rely on oxidative phosphorylation rather than glycolysis alone, challenging the current metabolic paradigm and ...
Wenzheng Zou +8 more
wiley +1 more source
Recognition of two distinct elements in the RNA substrate by the RNA-binding domain of the T. thermophilus DEAD box helicase Hera [PDF]
, 2013 DEAD box helicases catalyze the ATP-dependent destabilization of RNA duplexes. Whereas duplex separation is mediated by the helicase core shared by all members of the family, flanking domains often contribute to binding of the RNA substrate.
Klostermeier, Dagmar +5 more
core +1 more source
Identifying Tipping Points during Healthy Brain Aging through Single‐Nucleus Transcriptomic Analysis
Advanced Science, EarlyView.This study applies single‐nucleus transcriptomics and systems dynamics to uncover nonlinear aging patterns in healthy human brains. By introducing dynamic network biomarker theory, the authors identify a critical tipping point at ages 56–60 during aging, and highlight glial instability as a key mediator.
Peiru Wu +9 more
wiley +1 more source
Crystal structure of disodium 2-amino-6-oxo-6,7-dihydro-1H-purine-1,7-diide heptahydrate
Acta Crystallographica Section E: Crystallographic Communications, 2015 In the title compound, disodium 2-amino-6-oxo-6,7-dihydro-1H-purine-1,7-diide heptahydrate, 2Na+·C5H3N5O2−·7H2O, the structure is composed of alternating (100) layers of guanine molecules and hydrated Na+ ions. Within the guanine layer, the molecules are
Dvir Gur, Linda J. W. Shimon
doaj +1 more source
Non-Empirically Tuned Range-Separated DFT Accurately Predicts Both Fundamental and Excitation Gaps in DNA and RNA Nucleobases [PDF]
, 2012 Using a non-empirically tuned range-separated DFT approach, we study both the quasiparticle properties (HOMO-LUMO fundamental gaps) and excitation energies of DNA and RNA nucleobases (adenine, thymine, cytosine, guanine, and uracil).
Foster, Michael E., Wong, Bryan M.
core +2 more sources