Well we're just on the edge of our seats - what is it about the relationship between atomic theory and the molecular surfaces of nanometer-sized machine components that says ATP is a machine?
No, my comment about atomic theory was in response to Taq's apparent surprise that the surfaces of molecular machine components are ball-and-stick-ish. Like duh, what did he/she/it expect? We're dealing with the nano-meter scale here.
ATP isn't a machine, by the way. ATP is a molecule. ATP synthases are machines, however. If you dispute that, then you're more than welcome to cite a single scientific paper that argues that ATP synthases aren't machines. Go ahead. I'll be here writing up other responses while you do that little exercise.