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Related Concept Videos

Epistasis Analysis01:09

Epistasis Analysis

5.9K
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...
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Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Gene-Environment Interactions01:20

Gene-Environment Interactions

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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
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Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Related Experiment Video

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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
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Analysis of Gene-Gene Interactions.

Brian S Cole1, Molly A Hall1,2, Ryan J Urbanowicz1

  • 1Department of Biostatistics and Epidemiology, Institute for Biomedical Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.

Current Protocols in Human Genetics
|October 19, 2017
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Epistasis, or gene-gene interactions, significantly impacts complex traits and disease susceptibility. This unit explores methods for identifying these interactions and discusses ongoing research in the field.

Keywords:
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Area of Science:

  • Genetics and Bioinformatics
  • Complex Trait Analysis

Background:

  • Epistasis, the interaction between genes, plays a crucial role in the genetic basis of complex traits.
  • Identifying gene-gene interactions presents significant challenges in genetic research.
  • Understanding epistasis is vital for comprehending disease susceptibility.

Purpose of the Study:

  • To introduce the concept of epistasis and its importance in complex traits.
  • To review methodologies for discovering gene-gene interactions.
  • To discuss current research trends in epistasis.

Main Methods:

  • Historical overview of epistasis.
  • Review of statistical methods for epistasis detection.
  • Exploration of machine learning approaches for gene-gene interaction discovery.

Main Results:

  • Epistasis is a key factor in the genetic architecture of complex traits.
  • Various statistical and machine learning methods can identify gene-gene interactions.
  • Meta-analysis and replication are crucial for validating findings.

Conclusions:

  • Epistasis is fundamental to understanding complex traits and diseases.
  • Advanced computational methods are essential for discovering gene-gene interactions.
  • Future research directions include meta-analysis and replication studies.