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Related Concept Videos

Fixing Double-strand Breaks02:04

Fixing Double-strand Breaks

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

Fixing Double-strand Breaks

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...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Mismatch Repair01:36

Mismatch Repair

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Mismatch Repair01:36

Mismatch Repair

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Overview of DNA Repair02:25

Overview of DNA Repair

In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...

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The Smc5/6 complex: more than repair?

A Kegel1, C Sjögren

  • 1Department of Cell and Molecular Biology, Karolinska Insitutet, 171 77 Stockholm, Sweden.

Cold Spring Harbor Symposia on Quantitative Biology
|April 7, 2011
PubMed
Summary
This summary is machine-generated.

The Smc5/6 complex is crucial for genome stability, chromosome replication, segregation, and repair. This review explores its known functions and discusses a potential role beyond DNA repair.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • The Smc5/6 complex is vital for maintaining genome stability.
  • It belongs to the structural maintenance of chromosome (SMC) protein family, alongside cohesin and condensin.
  • Mutations in SMC complexes lead to chromosome instability and DNA damage sensitivity.

Purpose of the Study:

  • To provide an overview of the Smc5/6 complex's functions.
  • To discuss its role in genome stability, including DNA repair pathways.
  • To explore a potential non-repair function of the Smc5/6 complex.

Main Methods:

  • Literature review and synthesis of existing research on the Smc5/6 complex.
  • Analysis of data concerning chromosome segregation, replication, and repair.
  • Comparison of Smc5/6 functions with those of cohesin and condensin.

Main Results:

  • The Smc5/6 complex plays a central role in chromosome replication, segregation, and repair.
  • It is implicated in preventing aberrant DNA links during homologous recombination repair.
  • Evidence suggests Smc5/6 may also maintain the integrity of undamaged chromosomes.

Conclusions:

  • The Smc5/6 complex is essential for multiple aspects of genome maintenance.
  • While its repair functions are increasingly understood, a non-repair role warrants further investigation.
  • Further research is needed to fully elucidate the Smc5/6 complex's contribution to chromosome stability.