Answered: Normal p53 is a tumor suppressor gene,…

Normal p53 is a tumor suppressor gene, when mutated it loses this function. Explain how a tissue expressing normal p53 would lose control and have over-proliferation of the cells based on p53 levels.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter6: Reproduction At The Cellular Level

Section: Chapter Questions

Problem 15CTQ: Explain the difference between a proto-oncogene and a tumor suppressor gene.

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Genomic studies

Genomic studies (genomics) is the study of the whole genome of an organism. Using bioinformatics and high-performance computing, genomic researchers examined massive amounts of deoxyribonucleic acid (DNA)-sequence data to discover variations or mutations that affect drug response, health, or disease. Genomics is a much younger discipline than genetics, having only emerged in the last few decades as a result of technological advancements in DNA sequencing and computational biology.

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Normal p53 is a tumor suppressor gene, when mutated it loses this function. Explain how a tissue expressing normal p53 would lose control and have over-proliferation of the cells based on p53 levels.

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Tumor suppressor proteins can assist in slowing down the cell cycle under appropriate conditions. In humans, the TP53 gene encodes a tumor suppressor called p53. Most mutations in the TP53 gene result in a mutant form of p53 that can no longer function to slow down the cell cycle, which can lead to a cell becoming cancerous. However, some mutant forms of p53 actually possess the ability to increase a cell's resistance to anticancer treatments. Which of the following BEST describes the latter type of mutation? loss-of-function mutation gain-of-function mutation suppressor mutation reverse mutation
Despite being small animals, naked mole rats are almost entirely resistant to cancer. Watch the following brief video on one potential mechanism for the prevention of cancer in naked mole rats. https://youtu.be/bhNBeuhxkF0?si=38aelHLW1N6vN8-b Based on what you know about mitosis and cancer cells, why would a mechanism that prevents cell crowding reduce the likelihood of cancer developing?
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p53 gene, as is the Rb gene, is a tumor suppressor gene. p53 protein binds to DNA leading to the simulation of p21 that work together with cdk2. When p21 is defective and cannot joined to cdk2 the cell cannot pass through to the next stage of cell division. Mutated p53 cannot bind to DNA in an effective way, and therefore the p21 protein is not available to act as the 'stop signal' for cell division. Thus cells divide uncontrollably, and form tumors. Hi, can you please elaborate on this: based on the info above, what is the relationship between genetics and environment in the development of these type of cancer. Which factor (genetics or environment) is playing a larger role in the generation of these types of cancers?