Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 11.2CR
How are the structures of a GPCR and an RTK similar? How does initiation of signal transduction differ for these two types of receptors?
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What is the three-dimensional structure of GPCRs? How does the structure of these receptors determine their functions?
a line of cultured cells has a highly active Gs linked system that leads to persistent activation of adenyl cyclase. which of the following treatments is most likely to decrease signaling through this pathway. A) overexpression of G-alpha protein , B) overexpression of phosphodieterase, C) overexpression of ras protein, D) treatment with GTP, E) treatment with a protein kinase C agonist
Compare and contrast GPCR and RTK receptors with respect to
(a)structure (especially the transmembrane region),
(b) activation mechanism, and
(c) initial signal transduction across the membrane.
Chapter 11 Solutions
Campbell Biology
Ch. 11.1 - Explain how signaling is involved in ensuring that...Ch. 11.1 - In liver cells, glycogen Phosphorylase acts in...Ch. 11.1 - Prob. 3CCCh. 11.2 - Prob. 1CCCh. 11.2 - WHAT IF? What would the effect be if a cell made...Ch. 11.2 - MAKE CONNECTIONS How is ligand binding similar to...Ch. 11.3 - What is a protein kinase, and what is its role in...Ch. 11.3 - When a signal transduction pathway involves a...Ch. 11.3 - What is the actual signal that is being transduced...Ch. 11.3 - WHAT IF? If you exposed a cell to a ligand that...
Ch. 11.4 - How can a targct cell's response to a single...Ch. 11.4 - WHAT IF? If two cells have different scaffolding...Ch. 11.4 - Prob. 3CCCh. 11.4 - Prob. 4CCCh. 11.5 - Give an example of apoptosis during embryonic...Ch. 11.5 - WH AT IF? If apoptosis occurred when it should...Ch. 11 - What determines whether a cell responds to a...Ch. 11 - How are the structures of a GPCR and an RTK...Ch. 11 - What is the difference between a protein kinase...Ch. 11 - What mechanisms in the cell terminale its response...Ch. 11 - What is an explanation for the similarities...Ch. 11 - Binding of a signaling molecule to which type of...Ch. 11 - The activation of receptor tyrosinc kinases is...Ch. 11 - Lipid-soluble signaling molecules, such as...Ch. 11 - Consider this pathway: epinephrine G...Ch. 11 - Apoptosis involves all but which of the following?...Ch. 11 - Which Observation suggestcd to Sutherland the...Ch. 11 - Prob. 7TYUCh. 11 - DRAW IT Draw the following apoptotic pathway,...Ch. 11 - EVOLUTION CONNECTION Identify the evolutlonary...Ch. 11 - Prob. 10TYUCh. 11 - SCIENCE, TECHNOLOGY, AND SOCIETY The aging process...Ch. 11 - WRITE ABOUT A THEME: ORGANIZATION The properties...Ch. 11 - SYNTHESIZE YOUR KNOWLEDGE There are five basic...
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- What do the cytoplasmic domain of a G protein-coupled receptor and the adaptor protein in the RTK pathway have in common?arrow_forwardIn which of the following signaling pathways does ligand binding induce the phosphorylation of the receptor molecules? (Check all that apply.) A The TGF-beta pathway. B The Hedgehog/smoothened pathway. The Notch/Delta pathway. D) The Receptor-tyrosine kinase pathway. E) The canonical Wnt pathway.arrow_forwardWhat is signal transduction? Illustrate and describe the molecular events in signal transduction pathways involving 1) G-protein-coupled receptors and 2) enzyme linked receptors.arrow_forward
- What is the largest family of cell surface receptors (>1% of the human genome)?arrow_forwardSort the following steps of GPCR signal propagation (you may not use all the steps): A) Dephosphorylation of GPCR B) G protein dissociation to adenylate cyclase and GTP binds to the G protein C) Ligand binding to GPCR D) G protein dissociation from GPCR and GDP binds to the G protein E) Synthesis of CAMP F) Activation of PKA G) G protein association to adenylate cyclase H) G protein dissociation from GPCR and GTP binds to the G protein O F, C, H, F, B OC OB, D, A, E, H O C, H, G, E, F OA, G, H, B, Earrow_forwardMy boss has given me the purified extracellular portion of the Notch receptor. As Delta/Notch signaling occurs between cells, I know that both the Notch receptor and and Delta are most likely "comfortable" in the environment of the blood, not the cytosol, nucleus, mitochondria, etc... I want to purify Delta, the signal. What would be true of the most specific purification technique I could choose, i.e. the technique that will result in the fewest proteins in the fraction containing Delta? Do not worry about whether the protein works after fractionation yet. Pick ALL that apply. I would use ion exchange chromatography. I would use size exclusion chromatography I would use affinity chromatography I would use a water based mobile phase of 7.4 I would use an acetonitrile mobile phase with a pH of 7.4 I would use a water based mobile phase of pH 7.2 I would use an acetonitrile phase of 7.2 I…arrow_forward
- How is down-regulation possible in regulation receptors?arrow_forwardIf a cell expresses a dominant-negative tyrosine-kinase-linked receptor (RTK) that lacks the kinase domain, which of the following will still happen in response to a growth factor that binds the RTK? A Receptor cross-phosphorylation. Activation of target proteins by Ras. C) Receptor dimerization. D) Binding of the growth factor to its receptor. Interaction of Ras with the activated receptor. Barrow_forwardWhat is the JAK family responsible for? What types of signaling happens within these types of receptors?arrow_forward
- Different cell types express different types of receptors; even asingle cell may express multiple receptor types. Explain?arrow_forward7. A) What effect does the compound GppNHp, when applied to the inside of a cell during whole cell patch clamp recording, have on Cav2 channels at presynaptic terminals? B) What is the mechanism by which this compound affects G-protein signaling and Ca√2 channel activity? B. A.arrow_forwardEven in the presence of a Ras-GAP, a single amino acid change in as renders it incapable of hydrolyzing GTP. This mutation is known as Ras+ and is a cancer-causing mutation. What effect do you think this mutation will have on signaling downstream of Ras+? Why? a)A mutation would turn on the signaling pathway all of the time. b)Even if a route is mutated, it can still be turned on or off. c)Due to a mutation, the signaling pathway would always be off.arrow_forward
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