Briefly describe why a cell would need a family of chaperone proteins called “heat shock proteins” (HSPs). What is the role of HSPs in the cell? How do HSPs recognize their target? (5 sentence max) Please answer asap and in short
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- ), create a simple flowchart depicting the MC1R pathway. There should be a minimum of five steps in the pathway. Be sure to include reception (protein binding to its ligand), a portion of the transduction pathway (what’s the intracellular reaction? What molecule works intracellularly?), and the cellular response (What’s produced from the cell?).Use the SGF-signaling pathway image as a reference, to answer the following questions. Use the data provided to EXPLAIN if the cell will get to the response step or not. Keep in mind the purpose of this pathway is to cause skin cell division Growth Factor (GF-signal) Activation of GF Receptor (RTK-receptor) To cause Cell proliferation/cell division (Response) Plasma membrane Sos Grb2 (Ras GEF) (adapter) Raf МАРКK Mek МАРКK Activation of target genes that stimulate proliferation Erk МАРК You have a skin cell in a dish and have added Neural Growth Factor (NGF) to the cell media (the liquid the cell needs to live).Part A (Short Response): You are developing a TGF-β agonist, but you don’t yet know which specific proteins it is signaling through. You want to do a single Western blot to measure changes in signaling activity, regardless of which pathway is being activated. For which protein involved in these pathways could you measure the levels in the nucleus of cells and be confident in your results? Why? This part was already posted on chegg, but I didn't understand the answer. I need a thorough explanation, so I can fully understand. Part B (Short Response): There have been many attempts to block TGF-β signaling in cancer through many different mechanisms, but none of been very successful. Why do you think this is? I know they have gotten close to being successful, but I don't know what preventing their success.
- Figure 37.5 Heat shock proteins (HSP) are so named because they help refold misfolded proteins. In response to increased temperature (a “heat shock"), heat shock proteins are activated by release from the NR/HSP complex. At the same time, transcription of HSP genes is activated. Why do you think the cell responds to a heat shock by increasing the activity of proteins that help refold misfolded proteins?Second-messenger systems ultimately bring about the desired cell response by inducing a change in the shape and function of particular designated intracellular proteins. (True or false?)Enumerate SRP binding molecules and indicate the function elicited by each binding AND Explain the molecular mechanism behind SRP inactivation ANSWER BOTH
- TGF-B Receptor I (RI) phosphorylation of Smad2/3 does all of the following EXCEPT: activate Smad2/3 binding to the Co-Smad Smad4 dissociate intramolecular binding of Smad2/3 MH1 and MH2 domains. RI phosphorylation of Smad2/3 does all of these things. release Smad2/3 from the nucleus into the cytoplasm unmask the Smad2/3 nuclear localization signal (NLS).Metabolic syndrome is a clustering of various conditions including high blood pressure, high blood sugar, excess body fat, high serum triglycerides, and low high-density lipoproteins. Scientists studying metabolic syndrome cultured fibroblast cells from a metabolic syndrome patient and a healthy volunteer and challenged the cells to 100 nM insulin. Ten minutes after the stimulus was applied, they used a protein immunoblot to measure the amount of phosphorylated insulin receptor in the cultures. Use the passage to answer the question. Some patients with metabolic syndrome can continue to gain weight even if they consume fewer calories than other human adults. Based on this finding, which conclusion is MOST likely true? A. Patients with metabolic syndrome do not eliminate as many calories during excretion. B. Patients with metabolic syndrome do not expend as much energy during muscle contractions. C. Patients with metabolic syndrome have more efficient…Metabolic syndrome is a clustering of various conditions including high blood pressure, high blood sugar, excess body fat, high serum triglycerides, and low high-density lipoproteins. Scientists studying metabolic syndrome cultured fibroblast cells from a metabolic syndrome patient and a healthy volunteer and challenged the cells to 100 nM insulin. Ten minutes after the stimulus was applied, they used a protein immunoblot to measure the amount of phosphorylated insulin receptor in the cultures. Use the passage to answer the question. Insulin, in addition to regulating blood glucose, also promotes satiety. Ghrelin, on the other hand, is a peptide hormone that promotes hunger. Which statement BEST predicts the effect of ghrelin release on the insulin receptor? A. It increases insulin receptor expression. B. It decreases insulin receptor expression. C. It increases insulin receptor phosphorylation. D. It decreases insulin receptor phosphorylation.
- Metabolic syndrome is a clustering of various conditions including high blood pressure, high blood sugar, excess body fat, high serum triglycerides, and low high-density lipoproteins. Scientists studying metabolic syndrome cultured fibroblast cells from a metabolic syndrome patient and a healthy volunteer and challenged the cells to 100 nM insulin. Ten minutes after the stimulus was applied, they used a protein immunoblot to measure the amount of phosphorylated insulin receptor in the cultures. Use the passage to answer the question. A scientist hypothesizes that dysregulated insulin signaling is responsible for the development of excess body fat in metabolic syndrome patients. Based on the data, which of these, if true, would BEST support this hypothesis? A. Phosphorylated insulin receptor decreases the use of free energy in fibroblasts. B. Phosphorylated insulin receptor increases the use of free energy in fibroblasts. C. Phosphorylated insulin receptor…Metabolic syndrome is a clustering of various conditions including high blood pressure, high blood sugar, excess body fat, high serum triglycerides, and low high-density lipoproteins. Scientists studying metabolic syndrome cultured fibroblast cells from a metabolic syndrome patient and a healthy volunteer and challenged the cells to 100 nM insulin. Ten minutes after the stimulus was applied, they used a protein immunoblot to measure the amount of phosphorylated insulin receptor in the cultures. Use the passage to answer the question. The level of insulin in the blood is regulated by negative feedback. Which observation MOST supports this model? A. Insulin secretion increases metabolic syndrome symptoms. B. Insulin secretion decreases metabolic syndrome symptoms. C. Insulin receptor phosphorylation increases insulin secretion. D. Insulin receptor phosphorylation decreases insulin secretion.The progressive loss of cardiac myocytes due to cell death has been associated with cardiac dysfunction and heart failure. Which of the following would lead to a significant loss of cardiac myocytes? Select all that apply Treatment of rapamycin which results in inhibition of mTOR activity Prolonged or severe ER stress with increased accumulation of unfolded proteins Activation of AMPK and phosphorylation of the TSC1 complex mTOR activation and phosphorylation of Ulk1
