Phosphorylation of CheA

Question 1

What is the fn of the MCP

Answer 1

regulates the rate of CheA autophosphorylation

Question 2

What happens when attractants bind to the MCP

Answer 2

inhibits autophoshorylation of CheA. The filament will rotate CCW and cell will run

Question 3

What happens if no attractant is bound to the MCP

Answer 3

CheA will autophosphorylate then CheA-P will phophorylate CheY. CheY-P will interact w.FliM. filament will turn CW and cell tumbles

Question 4

What happens after cell tumbles

Answer 4

a few secs later CheZ will dephosphorlyate CheY-P. the Pi will be recycled

Question 5

How is CheB phosphorylated

Answer 5

CheA-P also phosphorylates Che-B

Question 6

What is the fn of CheB-P

Answer 6

demethylates the MCP. If no attractant is bound to MCP the level of MCP methylation will be low

Question 7

How is CheA phosphorylated

Answer 7

CheA takes ATP to produce ADP as waste produce and becomes CheA-P