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Related Concept Videos

Complexation Equilibria: The Chelate Effect01:19

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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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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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EDTA: Chemistry and Properties01:22

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Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
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Drug-receptor bonds are formed through various chemical forces when drugs interact with target cells. Covalent bonds, strong and irreversible, are exemplified by DNA-alkylating anticancer agents that inhibit cell division. However, such irreversible drug binding lacks selectivity and can modify the DNA of the surrounding healthy cells. Covalent binding often contributes to tissue toxicity, as seen with chloroform and paracetamol metabolites binding to the liver, causing hepatotoxicity.
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Homologous Recombination02:31

Homologous Recombination

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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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Author Spotlight: Quantitative Detection of DNA Protein Crosslinks and Their Post-Translational Modifications
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Metal complex interactions with DNA.

Benjamin J Pages1, Dale L Ang, Elisé P Wright

  • 1Nanoscale Organisation and Dynamics Group, School of Science and Health, University of Western Sydney, Locked Bag 1797 Penrith South DC, NSW 2751, Australia.

Dalton Transactions (Cambridge, England : 2003)
|November 28, 2014
PubMed
Summary
This summary is machine-generated.

Metal complexes interact with diverse DNA structures through various binding modes. This review explores these interactions, highlighting their potential in therapeutics and as tools for DNA structural studies.

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Area of Science:

  • Coordination Chemistry
  • Biophysical Chemistry
  • Genomic Sciences

Background:

  • Advances in biophysical, spectroscopic, and genomic methods reveal diverse DNA structures.
  • Transition metal complexes exhibit growing diversity due to varied coordination, geometry, redox potentials, and ligand effects.

Purpose of the Study:

  • To review the interactions between metal complexes and DNA.
  • To explore various binding modes and DNA structural forms.

Main Methods:

  • Biophysical techniques
  • Spectroscopic methods
  • Genomic approaches

Main Results:

  • Metal complexes interact with DNA via covalent/coordinate and non-coordinate modes (electrostatic, groove binding, intercalation).
  • The diversity of metal complexes leads to varied biological interactions with DNA.

Conclusions:

  • Metal complexes offer potential as therapeutic agents.
  • Metal complexes serve as valuable tools for probing DNA structure and interactions.