Results 61 to 70 of about 13,927,214 (311)
Metal Cations in G-Quadruplex Folding and Stability
Frontiers in Chemistry, 2016 This review is focused on the structural and physicochemical aspects of metal cation coordination to G-Quadruplexes (GQ) and their effects on GQ stability and conformation. G-quadruplex structures are non-canonical secondary structures formed by both DNA
Debmalya Bhattacharyya +2 more
semanticscholar +1 more source
Topologies of G-quadruplex: Biological functions and regulation by ligands.
Biochemical and Biophysical Research Communications - BBRC, 2020 G-Quadruplex (G4) is one of the higher-order structures occurring in guanine-rich sequences of nucleic acids, and plays critical roles in biological processes. The G4-forming sequences can generate three kinds of topologies, i.e., parallel, anti-parallel,
Yue Ma, Keisuke Iida, K. Nagasawa
semanticscholar +1 more source
G-Quadruplexes as Sensing Probes [PDF]
Molecules, 2013 Guanine-rich sequences of DNA are able to create tetrastranded structures known as G-quadruplexes; they are formed by the stacking of planar G-quartets composed of four guanines paired by Hoogsteen hydrogen bonding. G-quadruplexes act as ligands for metal ions and aptamers for various molecules.
Ruttkay-Nedecký, Branislav +5 more
openaire +4 more sources
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
A new cationic porphyrin derivative (TMPipEOPP) with large side arm substituents: a highly selective G-quadruplex optical probe. [PDF]
PLoS ONE, 2012 The discovery of uncommon DNA structures and speculation about their potential functions in genes has brought attention to specific DNA structure recognition.
Li-Na Zhu +4 more
doaj +1 more source
Isothermal folding of G-quadruplexes [PDF]
Methods, 2012 Thermodynamic studies of G-quadruplex stability are an essential complement to structures obtained by NMR or X-ray crystallography. An understanding of the energetics of quadruplex folding provides a necessary foundation for the physical interpretation of quadruplex formation and reactivity.
Gray, Robert D, Chaires, Jonathan B
openaire +2 more sources
An epithelial GPR35 isoform supports tumor‐associated transcriptional and metabolic phenotypes
FEBS Letters, EarlyView.GPR35 generates two functionally distinct isoforms with previously unresolved roles. GPR35‐short mediates immune‐cell chemotaxis, while GPR35‐long is enriched in colorectal cancer epithelium, where it supports increased metabolism, proliferation, and tumor‐associated transcriptional programs.
Jørgen D. Rønneberg +14 more
wiley +1 more source
A Photoresponsive Supramolecular G-Quadruplex [PDF]
Organic Letters, 2013 Photoirradiation of a hexadecameric supramolecular G-quadruplex leads to a diastereoselective [2 + 2] cyclodimerization of half of its constituent subunits, which in turn shifts the equilibrium toward the formation of a precise heteromeric octamer.
José M, Rivera, Diana, Silva-Brenes
openaire +2 more sources
Molecular Oncology, EarlyView.Cytarabine is a key therapy for acute myeloid leukaemia (AML), but its efficacy is limited by the dNTPase SAMHD1, which hydrolyses its active metabolite. Screening nucleotide biosynthesis inhibitors revealed that IMPDH inhibitors selectively sensitise SAMHD1‐proficient AML cells to cytarabine.
Miriam Yagüe‐Capilla +9 more
wiley +1 more source
Formation of G-quadruplex and Its Utilizing for an Automated Spectrometric Detection of Cisplatin
International Journal of Electrochemical Science, 2015 Here, we studied the formation of G-quadruplex using spectrophotometric methods (peroxidase activity of G-quadruplex) and verifications of obtained results by voltammetry (cytosine-adenine (CA) or guanine (G) peaks height).
Branislav Ruttkay-Nedecky +9 more
doaj +1 more source