BIM-46187 is a protein inhibitor that binds to the a-subunit of the G. protein. It prevents the GDP/GTP exchange and preventsactivity of the G protein. Which of the following would you expect to see lower levels of as a result? You can select more than oranswer.S-SNH2Mol. M: 795.11Image: https://aobious.com/aobious/protein-inhibitors/1086-bim-46187.htmlSelect one or more:O a. Cyclic AMP (CAMP)O b. Tyrosine kinaseO .HSPO d. Adenylyl Cyclase (AC)O e.DAGO f. JAKO g. IP3

Cell signaling is the conversion of the information in a signal into cellular response. Ligands,…

Answered: BIM-46187 is a protein inhibitor that…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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In trimetric G proteins the only function of the bamma y complex is to allow reactivating of the a subunit ? True or false
Starting from the situation below, explain the next immediate steps that occur after the agonist ligand binds to the GPCR. Describe what happens in terms of the GTP and the heterotrimeric G protein structure. www www Ligand α В GTP ZAN Y Copyright ©2009 Pearson Education, Inc. GDP
One form of anemia results when individuals have a deficiency in the enzyme phosphatidylinositol glycan A (PIGA). This enzyme is required for the membrane attachment of proteins anchored by glycolipids to the plasma membrane, using what is called a ‘GPI-linkage.’ Included in the group of GPI-linked cell surface proteins is DAF/CD55. These individuals become anemic because: DAF/CD55 prevents the lysis of red blood cells by infecting pathogens. DAF/CD55 normally prevents the spleen from clearing healthy red blood cells from the circulation. In the absence of PIGA, the red blood cell membrane is bare of proteins allowing increased access of complement activating proteins to attach to the cell membrane. DAF/CD55 is a complement inhibitory protein that inactivates any C3 convertase that may form on host cell surfaces. In the absence of PIGA, red blood cells are unable to synthesize high levels of hemoglobin.
Increased ROS levels are a hallmark for Alzheimer's Disease. This is accurately described by all but which of the following statements? ROS production is upregulated because of the activity of the enzyme NADPH oxidase Oxidative phosphorylation is increased, leading to enhanced ROS generation via the ETC Amyloid precursor protein is converted in higher amounts to the amyloid peptide facilitating greater amounts of aggregation BACE1 levels are transcriptionally increased via hypoxia inducible factor Mitochondrial pyruvate flux is reduced 00000
For each of the following examples, indicate whether the drug is acting on physical process, chemical process or enzymatic system (your answer should be only; Physical, Chemical or Enzymatic). A. A drug is used as an antidote in lead poisoning and acts by binding to lead particles in body (chelation therapy). B. A drug acts to reduce flatulence and acts by reducing the surface tension of intestinal gas bubbles in the GI tract (e.g. Simethicone). C. A drug competes with alpha-glucosidase in intestine to reduce glucose conversion from disaccharides (e.g. Acarbose).
What step ends the first-half of the chymotrypsin mechanism? Attack of water on the acyl-enzyme intermediate. Selected Collapse of the first tetrahedral intermediate, releasing of the C-terminal peptide fragment and formation of the acyl-enzyme intermediate. Deprotonation of serine by the histidine. Collapse of the second tetrahedral intermediate leading to the final products. REVIEW QUESTION 1/1 CONTINUE MacBook Pro https://virginiacommonwealth.instructure.com/courses/42082/assignments/271397 esc OT
Ligand binding to proteins may occur with varying strengths; some ligands bind tightly to proteins while others bind less tightly. The strengths of reversible binding are determined experimentally by varying concentrations of ligands, and measuring the saturation of the protein in the various ligand concentrations. One such laboratory study investigated the binding of a hormone to three different receptor proteins in the cell membrane. The data collected are shown in the table below: 1) Provide a brief explanation as to why ligand binding to proteins must be a reversible process. 2) Calculate the dissociation constant (Kd) for the hormone binding to each of the three proteins.
Draw a diagram of the "general model" aka “protein-protein interaction model" of suppression to show how it works (or how it can be used to find interacting proteins.)
Azathioprine is an immunosuppressant drug used in kidney transplants. In vivo, azathioprine is metabolized to the hypoxanthine analog 6- mercaptopurine, which is then converted into 6-mercaptopurine ribose monophosphate, the active form of the drug. 6- Mercaptopurine ribose monophosphate also inhibits de novo purine synthesis, reducing uric acid levels in the blood and urine. However, when administered to Lesch – Nyhan patients, there was no effect on uric acid levels. Explain why this is the case.
To answer this question, please reference the Problem Solving Video: pH and pK, of an Amino Acid. Proteases are enzymes that cleave peptide bonds using general acid-base catalysis. General acid-base catalysis relies on a protor donor or acceptor other than water. Proteases rely on proton transfer to create strong nucleophiles from active-site amino acid residues. In the protease chymotrypsin, an active-site serine is a potent nucleophile. A nearby residue, His 57, interacts with serine to increase its reactivity. A schematic of chymotrypsin's active site illustrates the active site Ser 195 and His 57 R groups. The Asp 102 residue helps position the His 57 residue via hydrogen bonding. Asp 102 [His] [His+] His 57 6.0 -H-N Chymotrypsin is a digestive enzyme with a catalytic optimum between pH 7.8 and 8.0. However, due to the presence of gastric juice, chymotrypsin often functions in an environment of pH 5.5-7.0. Incorrect The imidazole group of free histidine has a pK₂ of 6.0. Use the…
The Graph below shows the binding curves of two proteins (A and B) for the same ligand (L). Use this Graph and determine the dissociation constant, K, for both proteins. Which protein (A or B) has a greater affinity for ligand L? Which of the two proteins would be more easily inhibited by an antagonist? 1.0 Y 0.5 2 A 4 6 B 8 [L] (μM) 10 12 14 16
For the following problem, indicate whether enzyme is repressed (-) or produced (+). Please show all possible outcomes.

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