So, If kinases [i.e., A Kinase in mitosis or MOKIRs in meiosis] function was blocked by mutation, what would result?

Q5: Would A Kinase mutant cells enter anaphase more quickly than normal cells (mitosis)?
Q6: Would Separase be active before all kinetochores were attached to spindle fibers?
Q7: Would APC and CDC20 not bind to each other?
Q8: Would Securin be destroyed through Ubiqutin-mediated proteolysis?

Question

13-12-2022
Biology

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So, If kinases [i.e., A Kinase in mitosis or MOKIRs in meiosis] function was blocked by mutation, what would result?

Q5: Would A Kinase mutant cells enter anaphase more quickly than normal cells (mitosis)?
Q6: Would Separase be active before all kinetochores were attached to spindle fibers?
Q7: Would APC and CDC20 not bind to each other?
Q8: Would Securin be destroyed through Ubiqutin-mediated proteolysis?

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tutorconsortium271 tutorconsortium271 · Answer 1 · 2022-12-15T08:00:31+01:00

Securin is ubiquitinated by the APCCdc20 complex and sent to the 26S proteasome for destruction. As a result, free separase is produced, which has the ability to dissolve cohesin and start chromosome separation.

What purpose does ubiquitination serve?

Daily biological processes depend heavily on ubiquitination. The proteasome, which breaks down and reuses the substrates, is the pathway's primary target for proteins. It performs a variety of tasks, such as cellular functions, apoptosis, protein processing, immunological response, and DNA repair, as was already mentioned.

What causes ubiquitination to happen?

Associated proteins enzymes (E1s), proteolysis enzymes (E2s), & ubiquitin ligases (E3s), respectively, carry out the three key processes of ubiquitylation: activation, conjugated, and ligation.

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