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Related Concept Videos

DNA Base Pairing02:27

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Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
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During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
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Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base pairs. The strength of an acid or base is quantified in its ionization constant, Ka or Kb, which represents the extent of the acid or base ionization reaction. For the conjugate acid-base pair HA / A−, the ionization equilibrium equations and ionization constant expressions are
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Single-Strand DNA Binding Proteins01:03

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Metal-mediated base pairs in parallel-stranded DNA.

Jens Müller1

  • 1Westfälische Wilhelms-Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 30, 48149 Münster, Germany.

Beilstein Journal of Organic Chemistry
|March 23, 2018
PubMed
Summary
This summary is machine-generated.

Metal-mediated base pairs in parallel-stranded DNA offer novel ways to introduce metal functionality. These DNA structures show enhanced stability with certain metal ions compared to traditional DNA, expanding nucleic acid chemistry applications.

Keywords:
DNAmetal-mediated base pairsnucleic acids

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Area of Science:

  • Nucleic Acid Chemistry
  • Supramolecular Chemistry
  • Bioinorganic Chemistry

Background:

  • Metal-mediated base pairs replace hydrogen bonds with coordinate bonds to transition metal ions in DNA.
  • This technique allows site-specific introduction of metal-based functionality into nucleic acids.
  • Traditional DNA structures (B-DNA) have antiparallel strands, enforcing a cisoid glycosidic bond orientation.

Purpose of the Study:

  • To review metal-mediated base pairs specifically within parallel-stranded DNA duplexes.
  • To compare the stability of these metal-mediated base pairs in parallel versus antiparallel DNA.
  • To detail experimental conditions that stabilize parallel-stranded DNA duplexes with metal mediation.

Main Methods:

  • Review of literature on metal-mediated base pairs in parallel-stranded DNA.
  • Comparison of metal complex stability in parallel and antiparallel DNA duplexes.
  • Analysis of experimental conditions for stabilizing parallel DNA structures.

Main Results:

  • Metal-mediated base pairing is a versatile strategy applicable to parallel-stranded DNA.
  • Parallel-stranded DNA duplexes can accommodate metal-mediated base pairs with transoid glycosidic bond orientation.
  • Certain metal complexes, like cytosine-Ag(I)-cytosine, are more stabilizing in parallel DNA than antiparallel DNA.

Conclusions:

  • Parallel-stranded DNA offers a unique platform for metal-mediated base pair formation.
  • This approach expands the utility of metal-mediated base pairing beyond natural antiparallel DNA.
  • Understanding stabilization conditions is key to harnessing parallel-stranded metal-mediated DNA.