How does the binding of a signal molecule activate an RTK for downstream signaling? The RTK changes conformation to stimulate a G-protein. The RTK forms a dimer and cross-phosphorylates itself. The RTK undergoes a cleavage event to release the cytosolic portion. The RTK is an ion channel that opens in response to ligand binding.
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Step 1: The signal molecule binds to the extracellular domain of the receptor tyrosine kinase (RTK). Show more…
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How does the binding of a signal molecule activate an RTK for downstream signaling? ----> The RTK forms a dimer and cross-phosphorylates itself. ----> The RTK is an ion channel that opens in response to ligand binding. ----> The RTK changes conformation to stimulate a G-protein. ---> The RTK undergoes a cleavage event to release the cytosolic portion. Question-2: Which of the following is NOT an intracellular signaling protein activated by an RTK? a. PI-3-kinase b. Trimeric G-proteins c. Ras d. monomeric GTPase Question-3: The active form of a monomeric GTP-binding protein is the.... a. GTPase-activating protein (GAP). b. GTP-bound form. c. guanine nucleotide exchange factor (GEF). d. GDP-bound form
Adi S.
QUESTION 4 When activated, a G-protein has a structure that a. forms a complete complex with three subunits. b. forms a transmembrane domain. c. is bound to GTP. d. is able to bind to extracellular signals. QUESTION 5 How does the binding of a signal molecule activate an RTK for downstream signaling? a. The RTK changes conformation to stimulate a G-protein. b. The RTK is an ion channel that opens in response to ligand binding. c. The RTK undergoes a cleavage event to release the cytosolic portion. d. The RTK forms a dimer and cross-phosphorylates itself.
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