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Questions and Answers
Which protein is responsible for removing methyl groups on the MCP receptors?
Which protein is responsible for removing methyl groups on the MCP receptors?
- CheR
- CheB (correct)
- SAM
- CheA
What is the role of CheB methylesterase in the feedback loop?
What is the role of CheB methylesterase in the feedback loop?
- To reset the receptor for excitation (correct)
- To increase the negative charge on the receptor
- To activate the CheA kinase activity
- To remove attractant from the environment
What is the effect of CheB esterase-dependent removal of MCP methyl groups?
What is the effect of CheB esterase-dependent removal of MCP methyl groups?
- It neutralizes the negative charges on the signaling domains of an MCP dimer
- It intensifies the electrostatic force, repelling the MCP struts from each other (correct)
- It reduces the repulsive electrostatic effects, allowing the MCP struts to move closer to each other
- It increases the CheA-PO4 level, leading to higher CheA kinase activity
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