what enzymes phosphorylate/dephosphorylate proteins and what is the importance of this for protein function?
what enzymes phosphorylate/dephosphorylate proteins and what is the importance of this for protein function?
Homework Answers
Kinases and phosphotransferases are the enzymes that phosphotylate/ dephosphorylate protein. Phosphorylation is done on specific amino acids in protein generally serine and threonine. Phosphorylation converts active enzyme to inactive or inactive to active form according to the protein that is being phosphorylate. In this way it controls cellular activities i.e. during cell division phosphorylation of lamins causes breakdown of nuclear membrane, phosphorylation of histones change the chromatin structure.
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what enzymes phosphorylate/dephosphorylate proteins and what is
the importance of this for protein function?
Answer ALL questions please. ALL QUESTIONS 1) Protein kinase A (PKA) is a family of enzymes...
Answer ALL questions please. ALL QUESTIONS
1) Protein kinase A (PKA) is a family of enzymes that are part of cell signal systems, and their effect is to phosphorylate proteins, altering their activity. As an example, PKA can phosphorylate the enzyme acetyl- CoA carboxylase, causing it to activate. The ?G for this phosphorylation is +4.2 kcal/mol. How is ATP used to phosphorylate this enzyme, and how does phosphorylation affect enzyme activity?
1. What are the different types of proteins and their function? 2. Explain the meaning and importance of the primary, secondary, tertiary and quaternary structures of a protein and the factors that...
1. What are the different types of proteins and their function? 2. Explain the meaning and importance of the primary, secondary, tertiary and quaternary structures of a protein and the factors that cause its denaturation.
Amino Acids and Proteins 4. What are the different types of proteins and their function? 5....
Amino Acids and Proteins 4. What are the different types of proteins and their function? 5. Explain the meaning and importance of the primary, secondary, tertiary and quaternary structures of a protein and the factors that cause its denaturation.
1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which...
1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which of the statements are TRUE? (Multiple answers: You can select more than one option) A. Phosphorylated enzymes behave like competitive inhibitors B The presence of a phosphate acts as a non-competitive inhibitor/activator. No change in Km but significant change in Vmax C. The presence of a phosphate group induces a conformational change that modifies the affinity and catalytic ability of a target enzyme D....
1. What are the different types of proteins and their function? 2. Explain the meaning and...
1. What are the different types of proteins and their function? 2. Explain the meaning and importance of the primary, secondary, tertiary and quaternary structures of a protein and the factors that cause its denaturation.
12. Protein classification according function of proteins. Examples
12. Protein classification according function of proteins. Examples
Which of the following statements correctly matches a membrane protein with its function. -Structural proteins bind...
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
Phosphatases are a family of enzymes that remove phosphate groups from specific proteins; these phosphate groups had been added to the proteins by protein kinases. Vanadate is an inhibitor of phosphat...
Phosphatases are a family of enzymes that remove phosphate groups from specific proteins; these phosphate groups had been added to the proteins by protein kinases. Vanadate is an inhibitor of phosphatases in eukaryotic cells. What effect would vanadate have on the response of cells to signals received by receptor kinases? A) The signal would still bind the receptor, so there would be no effect. B) The response of the cell would last longer than it normally would. C) The response...
Describe the specific mechanisms of enzymes function. Pick a specific enzymes and describe its function and...
Describe the specific mechanisms of enzymes function. Pick a specific enzymes and describe its function and the importance of that function of life. Discuss how the loss of the enzymes would disrupt living processes.
How many Kcal are proteins per gram no matter the source? Calculate how much protein YOU...
How many Kcal are proteins per gram no matter the source? Calculate how much protein YOU should have each day (show your math)? What is the function of enzymes and how do they differ from collagen?
Answer ALL questions please. ALL QUESTIONS
1) Protein kinase A (PKA) is a family of enzymes that are part of cell signal systems, and their effect is to phosphorylate proteins, altering their activity. As an example, PKA can phosphorylate the enzyme acetyl- CoA carboxylase, causing it to activate. The ?G for this phosphorylation is +4.2 kcal/mol. How is ATP used to phosphorylate this enzyme, and how does phosphorylation affect enzyme activity?
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
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