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Related Concept Videos

Mutations in Microorganisms01:18

Mutations in Microorganisms

Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
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Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
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Temperature-sensitive mutations made easy: generating conditional mutations by using temperature-sensitive inteins

Guihong Tan1, Ming Chen, Christopher Foote

  • 1Division of Biological Sciences, Bond Life Sciences Center, University of Missouri, Columbia, Missouri 65211-7310, USA.

Genetics
|July 15, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed 41 intein switches, creating novel temperature-sensitive (TS) mutations for gene function studies. These switches allow reversible control over protein activity by simply changing the temperature, overcoming limitations of previous TS alleles.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Temperature-sensitive (TS) mutations are valuable for studying gene function.
  • Generating and identifying TS alleles is challenging, limiting their application in multicellular organisms.

Purpose of the Study:

  • To generate and characterize a novel collection of intein switches for creating TS mutations.
  • To provide a versatile tool for reversible control of protein activity.

Main Methods:

  • Generated and characterized 41 intein switches based on temperature-sensitive Sce VMA mutations.
  • Intein switches were designed to splice at permissive temperatures and fail at non-permissive temperatures.
  • Tested intein switch functionality across five different temperature ranges.

Main Results:

  • The 41 intein switches demonstrated reversible control of protein function via temperature shifts.
  • Intein switches function effectively in temperature ranges from 18°C to 30°C.
  • Successful generation of TS mutations applicable to various experimental conditions.

Conclusions:

  • The developed intein switches offer a powerful and user-friendly method for creating TS mutations.
  • This collection expands the utility of TS alleles in studying gene function across diverse organisms and experimental designs.
  • Intein switches provide tunable, reversible control over protein activity through simple temperature modulation.