Molecular machines are the dream of lot of chemists as I am.
We can mentioned the ATP synthase, composed of a rotor which turns thanks to a protons’ gradient and converted ADP plus P inorganic into ATP during the modification of conformation of alpha beta units.
These videos are really nice to understand the process:
Also, The kinesin which transport protein walking with ” two feet” on microtubules. The energy provided from an ATP stock from kinesin
This video is also well illustrated: