Tdp-43 Mutants
Tdp-43 Mutants - Related Videos
13:31
Novel Atomic Force Microscopy Based Biopanning for Isolation of Morphology Specific Reagents against TDP-43 Variants in Amyotrophic Lateral Sclerosis
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Cited by 17 •
2015
Using atomic force microscopy in combination with biopanning technology we created a negative and positive biopanning system to acquire antibodies against disease-specific protein variants present in any biological material, even at low concentrations. We were successful in obtaining antibodies to TDP-43 protein variants involved in Amyotrophic Lateral Sclerosis.
07:07
Measuring Glucose Uptake in Drosophila Models of TDP-43 Proteinopathy
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Cited by 3 •
2021
Glucose uptake is increased in Drosophila motor neurons affected by TAR DNA binding protein (TDP-43) proteinopathy, as indicated by a FRET-based, genetically encoded glucose sensor.
07:14
Optogenetic Phase Transition of TDP-43 in Spinal Motor Neurons of Zebrafish Larvae
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2022
We describe a protocol to induce phase transition of TAR DNA-binding protein 43 (TDP-43) by light in the spinal motor neurons using zebrafish as a model.
06:06
Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
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Cited by 2 •
2020
Here, we describe a S. pneumoniae serotype 1 strain 519/43 that can be genetically modified by using its ability to naturally acquire DNA and a suicide-plasmid. As proof of principle, an isogenic mutant in the pneumolysin (ply) gene was made.
18:01
Paradigms for Pharmacological Characterization of C. elegans Synaptic Transmission Mutants
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Cited by 20 •
2008
This video demonstrates how to employ two neural stimulants, aldicarb and pentylenetetrazole (PTZ), in complementary ways to study synaptic function in the nematode, C. elegans. This complementary approach may also be used to shed light on evolutionarily conserved mechanisms for modulating neuronal synchrony and has implications for epilepsy and seizures.
FAQs
Researchers can examine whether a mutation changes RNA interactions, nuclear localization, protein stability, or cytoplasmic aggregation. These properties provide separate experimental readouts rather than a single measure of dysfunction. Comparing them helps determine whether a mutant primarily affects where TDP-43 is located, how long it persists, how it processes RNA, or whether it accumulates abnormally inside cells.
Nuclear localization indicates whether TDP-43 remains in the cellular compartment where its RNA-processing activity can be assessed. A mutant that redistributes toward the cytoplasm may show altered RNA-related activity alongside aggregation or toxicity. Measuring distribution therefore helps distinguish consequences associated with mislocalization from effects more directly related to changes in protein stability or RNA interactions.
The normal protein provides a reference for interpreting changes in distribution, aggregation, toxicity, and RNA-processing activity. Without that comparison, an observed cellular effect cannot be readily attributed to the mutation. Parallel analysis also helps researchers identify which properties are specifically altered and which remain similar, strengthening conclusions about the mechanism of dysfunction.
A typical workflow introduces mutant constructs into cultured cells or model organisms, then compares their behavior with the normal protein. Researchers assess protein distribution, cytoplasmic aggregate formation, cellular toxicity, and RNA-processing activity. Using the same comparison framework across constructs allows the effects of individual mutations to be related to specific cellular phenotypes rather than examined in isolation.
These models can show whether a mutation is associated with abnormal protein distribution, increased cytoplasmic aggregation, altered stability, cellular toxicity, or disrupted RNA-processing activity. Considering several outcomes together is important because one phenotype may accompany another without explaining it completely. The combined results help connect molecular changes in TDP-43 with broader effects on cellular protein homeostasis.
Mutant constructs provide experimental systems for examining mechanisms associated with amyotrophic lateral sclerosis and frontotemporal dementia. By comparing mutant and normal TDP-43 in cells or model organisms, researchers can investigate how disrupted protein homeostasis relates to aggregation, toxicity, localization, and RNA processing. The same systems also support evaluation of potential therapeutic strategies by revealing disease-relevant cellular effects.