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Related Concept Videos

Proofreading01:31

Proofreading

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Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase...
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Proofreading01:43

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Translesion DNA Polymerases02:10

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Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
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PCR01:32

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Bacterial RNA Polymerase00:43

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Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
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The Replisome03:01

The Replisome

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DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
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Related Experiment Video

Updated: Feb 28, 2026

DNA Polymerase Activity Assay Using Near-infrared Fluorescent Labeled DNA Visualized by Acrylamide Gel Electrophoresis
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DNA Polymerase Activity Assay Using Near-infrared Fluorescent Labeled DNA Visualized by Acrylamide Gel Electrophoresis

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DNA polymerases and biotechnological applications.

Joos Aschenbrenner1, Andreas Marx1

  • 1Department of Chemistry, Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany.

Current Opinion in Biotechnology
|June 16, 2017
PubMed
Summary

DNA polymerases are crucial for molecular biology techniques like PCR and sequencing. Ongoing research focuses on discovering novel DNA polymerases with customized properties for advanced biotechnological applications.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Enzymology

Background:

  • DNA polymerases are essential enzymes for DNA replication, fundamental to both basic research and clinical diagnostics.
  • Key molecular biology techniques such as the polymerase chain reaction (PCR) and DNA sequencing rely heavily on the high fidelity of DNA polymerases.
  • Significant advancements in understanding DNA polymerases over the past 60 years have enabled critical biotechnological applications.

Purpose of the Study:

  • To highlight the indispensable role of DNA polymerases in modern biotechnology.
  • To underscore the need for novel DNA polymerases with specialized characteristics.
  • To review recent developments in engineering DNA polymerases for diverse applications.

Main Methods:

  • Characterization of DNA polymerase enzymes.
  • Enzyme engineering for optimized performance in PCR and sequencing.
  • Development of enzymes capable of utilizing unnatural substrates.

Main Results:

  • DNA polymerases exhibit high fidelity in DNA replication, crucial for biotechnological applications.
  • Advances in enzyme characterization have facilitated major molecular biology techniques.
  • Novel DNA polymerases have been developed with tailored properties for specific PCR and sequencing needs.
  • Engineered enzymes can synthesize and reverse transcribe modified nucleic acids using unnatural substrates.

Conclusions:

  • DNA polymerases are foundational to molecular biology and biotechnology.
  • Continuous innovation in DNA polymerase technology is essential to meet expanding application demands.
  • The development of engineered DNA polymerases broadens the scope of nucleic acid synthesis and modification.