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What structures or molecular machines are important for protein degradation in eukaryotes?

proteasome


How does Ubiquitin tagging fit into the process of protein degradation?

Ubiquitin tagging allows the 19S subunit of the 26S proteasome to recognize the potential protein substrate.


What are two mechanisms of protein regulation in eukaryote cells?

Two mechanisms of protein regulation in eukaryotic cells are post-translational modifications, such as phosphorylation or glycosylation, that can alter protein activity, stability, or localization. Another mechanism is protein degradation through the ubiquitin-proteasome system, which targets proteins for degradation when they are tagged with ubiquitin.


What is the function of ubiquitins?

Ubiquitins are small proteins that regulate protein degradation by marking target proteins for destruction by the proteasome. They attach to proteins targeted for degradation and signal for their removal from the cell. This process helps maintain cellular homeostasis by controlling protein levels.


The MPF protein complex turns itself off by?

The MPF protein complex turns itself off by triggering the degradation of cyclin subunits through the ubiquitin-proteasome pathway. This degradation reduces the levels of active cyclin-dependent kinase (CDK), which leads to the inactivation of MPF and allows the cell cycle to progress to the next phase.


What would happen initially to cells that lack a functional ubiquitin?

Cells that lack a functional ubiquitin system would have impaired protein degradation through the proteasome pathway. This can lead to accumulation of misfolded or damaged proteins, leading to cellular stress and dysfunction. Ultimately, it may result in cell death or contribute to the development of various diseases.


In what locations can proteasome be located?

Proteasomes are protein complexes. These protein complexes are present in eukaryotes, some bacteria and in archaea. The proteasomes are located in the nucleus and the cytoplasm when looking at eukaryotes.


What is bypass protein?

A bypass protein is one used in rumen protein degradation.


Restriction in protein intake will result in?

Protein degradation and muscle breakdown.


Which phrase describes the purpose of ubiquitin?

Ubiquitin is a small protein that primarily tags other proteins for degradation by the proteasome, a process known as ubiquitination. This modification regulates protein turnover and maintains cellular homeostasis by removing damaged or misfolded proteins. Additionally, ubiquitin can influence various cellular processes, including signal transduction, DNA repair, and cell cycle regulation. Overall, ubiquitin serves as a critical component in maintaining protein quality and regulating various cellular functions.


Where does protein degradation occur in the body?

Protein degradation occurs in the body primarily in the proteasomes, which are specialized structures within cells responsible for breaking down and recycling proteins that are no longer needed.


What is the functiom of pepsinogen?

Pepsinogen is the precursor for Pepsin, an enzyme for the degradation of protein.