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Mutation: Any detectable and heritable change in the genetic material that causes a change in the Genotype and which is transmitted to daughter cells and to succeeding generations.
 JoVE Immunology and Infection

Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency

1Viral Populations and Pathogenesis lab and CNRS 3015, Institut Pasteur


JoVE 2953

The present article describes the steps required to isolate and characterize RNA polymerase fidelity variants of RNA viruses and how to use mutation frequency data to confirm fidelity changes in tissue culture.

 JoVE Biology

Aip1p Dynamics Are Altered by the R256H Mutation in Actin

1Department of Pediatrics, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, 2Department of Biochemistry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa


JoVE 51551

Disease-causing mutations in actin can alter cytoskeletal function. Cytoskeletal dynamics are quantified through imaging of fluorescently tagged proteins using total internal fluorescence microscopy. As an example, the cytoskeletal protein, Aip1p, has altered localization and movement in cells expressing the mutant actin isoform, R256H.

 JoVE Clinical and Translational Medicine

Primary Orthotopic Glioma Xenografts Recapitulate Infiltrative Growth and Isocitrate Dehydrogenase I Mutation

1Department of Neurology, Vanderbilt University Medical Center, 2Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, 3Neurology Service, Veteran Affairs TVHS


JoVE 50865

Malignant gliomas constitute a heterogeneous group of highly infiltrative glial neoplasms with distinct clinical and molecular features. Primary orthotopic xenografts recapitulate the histopathological and molecular features of malignant glioma subtypes in preclinical animal models.

 JoVE Biology

Combining Magnetic Sorting of Mother Cells and Fluctuation Tests to Analyze Genome Instability During Mitotic Cell Aging in Saccharomyces cerevisiae

1Department of Biological Sciences, Rensselaer Polytechnic Institute


JoVE 51850

Mutation rates in young Saccharomyces cerevisiae cells measured through fluctuation tests are used to predict mutation frequencies for mother cells of different replicative ages. Magnetic sorting and flow cytometry are then used to measure actual mutation frequencies and age of mother cells to identify any deviations from predicted mutation frequencies.

 JoVE Biology

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules

1Department of Chemical and Biological Engineering, Princeton University


JoVE 50476

We developed computational de novo protein design methods capable of tackling several important areas of protein design. To disseminate these methods we present Protein WISDOM, an online tool for protein design (http://www.proteinwisdom.org). Starting from a structural template, design of monomeric proteins for increased stability and complexes for increased binding affinity can be performed.

 JoVE Biology

Transgenic Rodent Assay for Quantifying Male Germ Cell Mutant Frequency

1Environmental Health Science and Research Bureau, Health Canada, Environmental Health Centre


JoVE 51576

De novo mutations in the male germline may contribute to adverse health outcomes in subsequent generations. Here we describe a protocol for the use of a transgenic rodent model for quantifying mutations in male germ cells induced by environmental agents.

 JoVE Immunology and Infection

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

1Greehey Children's Cancer Research Institute, UT Health Science Center at San Antonio, 2Department of Cellular and Structural Biology, UT Health Science Center at San Antonio, 3Department of Pathology, UT Health Science Center at San Antonio, 4Department of Microbiology, UT Health Science Center at San Antonio, 5Cancer Therapy and Research Center, UT Health Science Center at San Antonio


JoVE 50752

Here we describe an in vivo mutagenesis assay for small numbers of purified hematopoietic cells using the LacI transgenic mouse model. The LacI gene can be isolated to determine the frequency, location, and type of DNA mutants spontaneously arisen or after exposure to genotoxins.

 JoVE Immunology and Infection

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

1Institute for Bioscience and Biotechnology Research, University of Maryland


JoVE 4216

A novel directed evolution method specific to the field of thermostability engineering was developed and consequently validated for bacteriolytic enzymes. After only one round of random mutagenesis, an evolved bacteriolytic enzyme, PlyC 29C3, displayed greater than twice the residual activity when compared to the wild-type protein after elevated temperature incubation.

 JoVE Biology

In Vitro Reconstitution of Light-harvesting Complexes of Plants and Green Algae

1Department of Physics and Astronomy, VU University Amsterdam


JoVE 51852

This protocol details the reconstitution of light-harvesting complexes in vitro. These integral membrane proteins coordinate chlorophylls and carotenoids and are responsible for harvesting light in higher plants and green algae.

 JoVE Biology

Investigating Protein-protein Interactions in Live Cells Using Bioluminescence Resonance Energy Transfer

1Language and Genetics Department, Max Planck Institute for Psycholinguistics, 2Donders Institute for Brain, Cognition and Behaviour


JoVE 51438

Interactions between proteins are fundamental to all cellular processes. Using Bioluminescence Resonance Energy Transfer, the interaction between a pair of proteins can be monitored in live cells and in real time. Furthermore, the effects of potentially pathogenic mutations can be assessed.

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