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Related Concept Videos

Combinatorial Gene Control02:33

Combinatorial Gene Control

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
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Programmable trans-splicing riboregulators for complex cellular logic computation.

Yuanli Gao1,2,3, Rizki Mardian3, Jiaxin Ma1,2

  • 1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.

Nature Chemical Biology
|January 3, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed split-intron-enabled trans-splicing riboregulators (SENTRs) for synthetic biology. These SENTRs offer enhanced programmability and orthogonality, enabling complex genetic circuit designs in E. coli.

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Area of Science:

  • Synthetic biology
  • Molecular biology
  • Biotechnology

Background:

  • Synthetic genetic circuits require reliable regulatory mechanisms for scalability.
  • Existing systems face limitations in programmability, performance, predictability, and orthogonality.

Purpose of the Study:

  • To develop a novel class of regulatory elements for synthetic genetic circuits.
  • To enhance the programmability, predictability, and orthogonality of gene regulation.

Main Methods:

  • Design and implementation of split-intron-enabled trans-splicing riboregulators (SENTRs).
  • Utilizing de novo designed external guide sequences for riboregulator function.
  • Employing machine learning for predictability assessment.

Main Results:

  • SENTRs exhibit low leakage expression, wide dynamic range, and low crosstalk.
  • Demonstrated RNA sensing, logic computation, and signal transduction capabilities.
  • Successfully implemented digital logic operations with up to six inputs using orthogonal SENTRs.

Conclusions:

  • SENTRs provide a powerful and versatile post-transcriptional regulatory tool.
  • The technology enables complex gene circuit construction and offers broad biotechnological applications.
  • SENTRs advance the field of synthetic biology with improved genetic control.