Beta-catenin Gain-of-function
Beta-catenin Gain-of-function - Related Videos
09:41
Reconstitution Of β-catenin Degradation In Xenopus Egg Extract
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Cited by 4 •
2014
A method is described for analyzing protein degradation using radiolabeled and luciferase-fusion proteins in Xenopus egg extract and its adaptation for high-throughput screening for small molecule modulators of protein degradation.
01:23
Catenins
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2023
Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins. Catenins in Cell Junctions Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
09:31
Assessing Replication and Beta Cell Function in Adenovirally-transduced Isolated Rodent Islets
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Cited by 16 •
2012
This protocol allows one to identify factors that modulate functional beta cell mass to find potential therapeutic targets for the treatment of diabetes. The protocol consists of a streamlined method to assess islet replication and beta cell function in isolated rat islets following manipulation of gene expression with adenoviruses.
01:15
Gain
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2024
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions. Gain: Suppose Vin is the input and Vout is the output signal to a circuit. The input and output signals have the amplitude A and B and a phase angle of 0° and θ°,...
06:18
Measurement of Specific Mycobacterial Mistranslation Rates with Gain-of-function Reporter Systems
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Cited by 10 •
2019
In this article, we present two complementary methods to measure specific rates of translational error and mistranslation in the model mycobacterium, Mycobacterium smegmatis, using gain-of-function reporter systems. The methods can be employed to measure accurate error rates in low throughput or relative error rates in a more high-throughput setting.
FAQs
Activating mutations or altered Wnt signaling can prevent the phosphorylation step that normally marks cytoplasmic beta-catenin for degradation. As a result, the protein remains available to accumulate and support signaling rather than being rapidly removed. This persistence gives cells a sustained beta-catenin signal, which can alter gene expression and cellular behavior beyond normal pathway control.
Beta-catenin has functions connected to cell adhesion as well as Wnt-dependent transcription. A gain-of-function state can therefore influence tissue organization while also changing which genes are activated in the nucleus. Considering both roles is important in biology because altered adhesion and altered gene expression may contribute together to changes in cell fate, proliferation, and tissue patterning.
Nuclear accumulation places beta-catenin where it can activate TCF/LEF target genes. This converts an abnormal increase in protein stability into a transcriptional response that can persist in affected cells. The resulting gene-expression changes provide a mechanistic link between dysregulated Wnt signaling and outcomes such as altered developmental decisions or increased cellular proliferation.
Constitutive activity can influence cell fate, proliferation, and tissue patterning. These outcomes reflect different levels of biological organization: cells may adopt altered developmental identities, divide inappropriately, or contribute to abnormal tissue arrangement. Examining all three helps researchers distinguish a direct signaling effect from a broader developmental or disease-related consequence of pathway dysregulation.
Researchers study this altered state to examine how excessive beta-catenin signaling affects developmental decisions and tissue patterning. Because beta-catenin normally participates in Wnt-dependent gene expression, increased activity can reveal how persistent pathway output changes cell fate during development. Such models help connect molecular signaling changes with abnormal biological structures or developmental outcomes.
Persistent beta-catenin activity can provide a model for investigating how dysregulated Wnt signaling contributes to tumor formation. Its effects on target-gene activation and cell proliferation are especially relevant when researchers examine how abnormal signaling may shift cells away from normal growth control. The approach links a defined molecular alteration with disease-associated cellular behavior.
These studies can connect altered beta-catenin regulation with changes in gene expression, cell fate, proliferation, and tissue patterning. They also help evaluate the contribution of dysregulated Wnt signaling to disease rather than treating the pathway as an isolated molecular event. In biology, this provides a framework for relating protein-level abnormalities to developmental and tumor-related outcomes.