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Related Concept Videos

Bacterial Transcription01:53

Bacterial Transcription

39.6K
RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
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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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Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
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Engineering a bacterial tape recorder.

Alexander Prokup1, Alexander Deiters

  • 1Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (USA).

Chembiochem : a European Journal of Chemical Biology
|March 31, 2015
PubMed
Summary
This summary is machine-generated.

Scientists created a bacterial DNA recorder that writes and reads information, improving on previous cellular memory systems. This scalable, reversible DNA data storage responds to external signals like light.

Keywords:
genomic memoryrecombinasessynthetic biology

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Area of Science:

  • Synthetic Biology
  • Molecular Biology
  • Biotechnology

Background:

  • Cellular memory systems store information within biological systems.
  • Existing platforms rely on DNA recombinase function but have limitations in scalability and recording capacity.
  • There is a need for improved methods for recording and retrieving information in bacterial genomes.

Purpose of the Study:

  • To develop a novel method for producing and integrating single-stranded DNA into bacterial genomes.
  • To create a scalable and high-capacity DNA data storage system.
  • To enable reversible DNA memory storage responsive to exogenous signals.

Main Methods:

  • Development of a modular DNA writing system utilizing DNA recombinase function.
  • Integration of single-stranded DNA into specific genomic locations in bacteria.
  • Implementation of response mechanisms to exogenous signals, including analogue inputs like light exposure.

Main Results:

  • Successful production and genomic integration of single-stranded DNA in bacteria.
  • Demonstration of a cellular tape recorder-like system for writing and reading DNA information.
  • Enhanced scalability and recording capacity compared to previous DNA memory platforms.
  • Achieved reversible memory storage and recording in response to analogue inputs.

Conclusions:

  • The developed system offers a significant advancement in bacterial DNA data storage.
  • This modular memory writing system expands the synthetic biology toolbox.
  • The improved scalability and responsiveness provide new possibilities for biological recording and information processing.