If a mutation is introduced into I-KBα that inhibits it phosphorylation by the IKK complex, this would prevent: O dimerization of the p50 and p65 subunits. translocation of NF-kB into the nucleus. O TAK1 phosphorylation of IKKB. recruitment of Nemo to the IKK complex.
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- An SH2-containing protein contains a mutation that changes its binding pocket such that tyrosine and phosphotyrosine bind with equal affinity. As a result, MEK activity: does not change with receptor dimerization and transautophosphorylation decreases due to changes in Raf activation increases with ligand binding-induced dimerization decreases due to allosteric inhibition of SH2-domain bindingWhen a signal ligand binds to the extracellular portion of the RTK receptor, in the MAP kinase pathway, what is the first kinase to be activated?What is meant by intrinsic GTPase activity? Exchange of GDP for GTP on the a-subunit of the G protein Inhibition of GBCR receptor activity Activation of Adenylyl Cyclades Breakdown of cAMP by phosphodiesterase Spontaneous hydrolysis of GTP on the a-subunit of the G-protein
- Cyclic adenosine monophosphate (CAMP) is a molecule that can act as anallosteric activator of kinase enzymes inside of the cytoplasm. Describehow CAMP molecules affect kinase enzymes?Does adenylate cyclase become more active when the inhibitory (Gia) protein is mutated and increases its intrinsic GTPase activity?Which of the following is a type of signal transduction pathway controlling gene expression? All of these Protein subunit dissociation pathway Receptor-associated kinase pathway None of these Cytosolic kinase pathway
- Which of the following are characteristics of “small” monomeric Ras GTPases? A. Membrane bound B. Act as molecular switches between GTP & GDP C. They interact with receptors directly to regulate upstream events D. They are activated upon GTP binding E. None of the aboveMutations that inactivate p53 have a recessive phenotype, whereas mutations affecting Ras are dominant. Explain the difference.Under what conditions does the CAP protein become a functional activating protein? Group of answer choices when cAMP is absent and CAP is bound to glucose when glucose is absent and CAP is bound to cAMP none of these when glucose is abundant and CAP is bound to cAMP when cAMP is abundant and CAP is bound to glucose