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Maxam-Gilbert Sequencing01:05

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In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
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Single-Stranded DNA as Supramolecular Template for One-Dimensional Palladium(II) Arrays.

Antonio Pérez-Romero1, Alicia Domínguez-Martín1, Simona Galli2

  • 1Departamento de Química Inorgánica., Unidad de Excelencia de Química Aplicada a Biomedicina y, Medioambiente, Universidad de Granada, Avda Fuentenueva s/n, 18071, Granada, Spain.

Angewandte Chemie (International Ed. in English)
|February 9, 2021
PubMed
Summary
This summary is machine-generated.

Researchers created novel 1Pd-DNA molecules, forming continuous single chains of palladium (II) ions, through a simple self-assembly process. This breakthrough offers a cost-effective method for atomic-level control over metal chain growth in DNA nanostructures.

Keywords:
DNAbioinorganic chemistrymetal-mediated base pairpalladiumself-assembly

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Area of Science:

  • Supramolecular Chemistry
  • Nanotechnology
  • Biochemistry

Background:

  • Achieving atomic-level control over metal chain growth is challenging and often requires complex, expensive methods.
  • Self-assembly offers a promising route for creating ordered nanostructures.

Purpose of the Study:

  • To develop a simple and cost-effective method for creating continuous single metal chains within DNA molecules.
  • To investigate the structure and properties of these novel 1Pd-DNA hybrids.

Main Methods:

  • Self-assembly reaction between a palladium complex and single-stranded DNA (ss-DNA).
  • Synthesis and characterization of single Pd(II)-base pairs using solution and X-ray diffraction.
  • Structural analysis of 1Pd-DNA hybrids using small-angle X-ray scattering (SAXS) and ab-initio calculations.

Main Results:

  • Successfully prepared 1Pd-DNA molecules with continuous single chains of palladium (II) ions.
  • Characterized Pd(II)-base pairs ([1Pd(N1-A)] and [1Pd(N1-X)]) structurally mimicking Watson-Crick base pairs.
  • 1Pd-DNA hybrids exhibit a double-stranded DNA-like structure where one strand is replaced by stacked Pd(II) complexes.

Conclusions:

  • A simple self-assembly approach enables the formation of continuous Pd(II) chains within DNA.
  • The resulting 1Pd-DNA structures offer a novel DNA-like framework with integrated metal ions.
  • This work provides a foundation for designing new DNA-based nanomaterials with controlled metal incorporation.