When adrenaline (epinephrine) binds to its integral membrane receptor, this initiates an intracellular signalling cascade, which includes each of the following events (but not necessarily in this order):

1. GTP binds to the Gα subunit
2. cAMP is hydrolysed to give AMP
3. The adrenergic receptor undergoes a conformational change
4. ATP is converted to cAMP and pyrophosphate
5. GDP dissociates from the Gα subunit
6. The Gα subunit binds to adenylyl cyclase

What is the correct order of these events?