Related Experiment Video
Updated: May 10, 2026
10:46
Gene Digital Circuits Based on CRISPR-Cas Systems and Anti-CRISPR Proteins
Published on: October 18, 2022
Phenotypic deconstruction of gene circuitry
Jason G Lomnitz1, Michael A Savageau
1Department of Biomedical Engineering, University of California, Davis, California 95616, USA.
Chaos (Woodbury, N.Y.)
|July 5, 2013
Summary
Researchers developed a novel method to analyze complex gene circuits by breaking them into smaller, mathematically defined parts. This approach helps identify and understand the full range of system behaviors for easier experimental testing.
Area of Science:
- Systems biology
- Computational biology
- Synthetic biology
Background:
- Understanding the full behavioral range of complex nonlinear gene circuits is difficult.
- Existing methods struggle to provide a global perspective on gene circuit dynamics.
Purpose of the Study:
- To present a new method for deconstructing complex gene circuits into nonlinear subsystems.
- To enable identification, enumeration, and analysis of qualitatively distinct phenotypes within a system design space.
Main Methods:
- Deconstructing complex systems into nonlinear subsystems based on mathematically defined phenotypes.
- Representing subsystems within a system design space for analysis.
- Illustrating the method with a two-gene circuit example.
Main Results:
- The method efficiently characterizes large regions of system design space.
- It allows for the identification and enumeration of diverse system phenotypes.
- Alternative hypotheses for experimental testing are quickly generated.
Conclusions:
- This approach provides a powerful framework for understanding complex gene circuit behavior.
- It facilitates the exploration and design of synthetic gene circuits.
- The method aids in navigating system design space for experimental validation.
Related Concept Videos
01:09Epistasis Analysis
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
02:46Genetic Screens
Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
01:16In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
02:33Combinatorial Gene Control
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.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
02:08Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...