how do phospholipases and phosphotases regulate signal transduction?
Homework Answers
Phospholipases and phosphotases both play an important role in the signal transduction. Phospholipases , specifically phospholipase C is catalyze the conversion of PIP(phosphatidylinositol) that is present in plasma membrane component, into DAG and IP3. Both ths DAG and IP3 act as an important second messanger in case of signal transduction and these molecule mediate the effect of first messanger in case of signal transduction. Therefore, phospholipases help to activate second messanger that carry informatio from the receptor present in cell membrane to the nucleus of the cell.
On the other, phosphotases are the enzyme that remove phosphate group from the molecule. This enzyme help in the corrdination with kinase enzyme in signal tranduction. The ligands having that are attach to the receptor protein and phosphotases mediate the transduction of these messages from receptor to ths nucleus.
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Describe how the signal transduction pathway that involves G proteins is similar to the signal transduction...
Describe how the signal transduction pathway that involves G proteins is similar to the signal transduction pathway involving inositol triphosphate. In a second paragraph describe how these 2 signal transduction pathways differ from one another. In a third paragraph describe how these 2 pathways are turned off.
5. What is the function of phosphatases in signal transduction processes? Amplify the transduction signal so...
5. What is the function of phosphatases in signal transduction processes? Amplify the transduction signal so it affects multiple transducers Amplify the second messengers such as CAMP Inactivate protein kinases and turn off the signal transduction Prevent a protein kinase from being reused when there is another extracellular signal Move the phosphate group of the transduction pathway to the next molecule of a series
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A signal transduction pathway includes the steps listed below. 1. An inactive signal transduction molecule is...
A signal transduction pathway includes the steps listed below. 1. An inactive signal transduction molecule is activated. 2. A transcription factor enters the nucleus. 3. A gene is expressed. 4. A ligand binds to a receptor. 5. A receptor undergoes a conformational change. 6. An active signal transduction molecule binds a transcription factor. Which represents the correct order of these steps? 4, 1, 5, 6, 2, 3. 5, 4, 1, 6, 3, 2. 4, 5, 1, 6, 2, 3. 1,...
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Describe the nature of a ligand-receptor interactionand state how such interactions initiate a signal-transduction system
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-Trace the general mechanism by which a signal transduction pathway occurs (i.e. from signaling molecule to response) Describe the two ways in which signaling proteins act as molecular switches -...
-Trace the general mechanism by which a signal transduction pathway occurs (i.e. from signaling molecule to response) Describe the two ways in which signaling proteins act as molecular switches -Which amino acid residues do kinases typically add phosphate groups? Distinguish between the two types of G proteins -What proteins regulate GTP-binding protein (G proteins) in terms of activation and inactivation? - Distinguish between the three main classes of cell surface receptors.
-Trace the general mechanism by which a signal transduction...
5. What is the function of phosphatases in signal transduction processes? Amplify the transduction signal so it affects multiple transducers Amplify the second messengers such as CAMP Inactivate protein kinases and turn off the signal transduction Prevent a protein kinase from being reused when there is another extracellular signal Move the phosphate group of the transduction pathway to the next molecule of a series
Section 12.3 20) Which process is NOT a feature of visual signal transduction? e. activation of a cGMP phosphodiesterase 1. replacement of all-trans-retinal catalyzed by transducin 8. light absorption by 11-cis-retinal h. change in cell membrane potential Section: 12.3 GPCRs in Vision, Olfaction, and Gustation Section 12.4 21) Receptor tyrosine kinases: e. are dimers. f. do not regulate gene expression. 8. engage in extensive cross talk with other signal transduction systems. h. bind insulin. Section: 12.4 Receptor Tyrosine kinases Section...
-Trace the general mechanism by which a signal transduction pathway occurs (i.e. from signaling molecule to response) Describe the two ways in which signaling proteins act as molecular switches -Which amino acid residues do kinases typically add phosphate groups? Distinguish between the two types of G proteins -What proteins regulate GTP-binding protein (G proteins) in terms of activation and inactivation? - Distinguish between the three main classes of cell surface receptors.
-Trace the general mechanism by which a signal transduction...
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