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Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
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The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
Fixing Double-strand Breaks02:04

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The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
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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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Video Experimental Relacionado

Updated: Jun 2, 2026

Using Modified Synthetic Oligonucleotides to Assay Nucleic Acid-Metabolizing Enzymes
05:33

Using Modified Synthetic Oligonucleotides to Assay Nucleic Acid-Metabolizing Enzymes

Published on: July 5, 2024

Las nucleasas FEN: se unen, se doblan, se deshilachan, se cortan.

R Scott Williams1, Thomas A Kunkel

  • 1Laboratory of Structural Biology, National Institute of Environmental Health Sciences, National Institutes of Health, DHHS, Research Triangle Park, NC 27709, USA. williamsrs@niehs.nih.gov

Cell
|April 19, 2011
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores descubrieron mecanismos moleculares clave detrás de las especificidades de la nucleasa RAD2/FEN. Estos hallazgos avanzan en nuestra comprensión de los procesos de replicación y mantenimiento del ADN.

Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • La bioquímica es la bioquímica.
  • Genética La genética.

Sus antecedentes:

  • La superfamilia de nucleasas RAD2/FEN juega un papel crucial en la replicación y el mantenimiento del ADN.

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  • Comprender las especificidades de escisión de estas nucleasas es vital para comprender las vías de reparación del ADN.