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Related Concept Videos

Mutations01:39

Mutations

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Overview
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Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
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Viral Mutations00:36

Viral Mutations

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A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
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Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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Mutations in Microorganisms01:18

Mutations in Microorganisms

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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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Point and Frameshift Mutations01:30

Point and Frameshift Mutations

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Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
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Isolation of Functional Cardiac Immune Cells
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How a mutation undermines cardiac function.

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    Summary
    This summary is machine-generated.

    A mutated troponin T protein causes cardiac hypertrophy, a condition where the heart muscle thickens. This genetic mutation affects heart function and can lead to serious cardiovascular issues.

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    Area of Science:

    • Cardiology
    • Molecular Biology
    • Genetics

    Background:

    • Cardiac hypertrophy is a significant risk factor for heart failure.
    • Troponin T is a critical component of the cardiac muscle contractile apparatus.
    • Genetic mutations can alter protein function, leading to disease.

    Discussion:

    • This study investigates a specific mutation in troponin T and its direct link to the development of cardiac hypertrophy.
    • The research elucidates the molecular mechanisms by which the mutated troponin T disrupts normal cardiac function.
    • Understanding these mechanisms is crucial for developing targeted therapies.

    Key Insights:

    • A novel mutation in troponin T has been identified as a direct cause of cardiac hypertrophy.
    • The mutation leads to altered calcium sensitivity and impaired relaxation in cardiac myocytes.
    • This finding provides a new molecular target for understanding and treating hypertrophic cardiomyopathy.

    Outlook:

    • Further research will focus on the long-term consequences of this mutation and its progression.
    • Investigating potential therapeutic interventions targeting the mutated troponin T pathway.
    • Exploring the broader implications for other genetic cardiomyopathies.