How to calculate the number of interfacial water molecules?

Hii all!

So I am studying protein DNA interactions. Can anyone guide me on how I can calculate the number of water molecules in the interface of protein and DNA?

Thank you!

as far as I know there is not GMX tools doing this. But you could use gmx select ( to identify those molecules and write them a dynamic index.

Here you find the syntax for gmx select

I hope it helps