Can anyone suggest a program for analysing protein-protein interfaces (ASA, Planarity, Gap volume index, Residues etc.)?

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Pandjassarame Kangueane

ASA - SURFACE RACER. This user friendly.

SURFNET will help with others - http://www.ebi.ac.uk/thornton-srv/software/SURFNET/

You can also look at of my work on PPI.

http://www.biomedical-informatics.net/research/ppi/

Adnan Sljoka

Whatif has relevant and total ASA calculations per residue and per atom

http://swift.cmbi.ru.nl/servers/html/index.html

Zeeshan Arshad

Is it also help to somehow calculate the planarity index of the compounds?

Annemarie Honegger

You can run ePisa http://www.ebi.ac.uk/pdbe/pisa/ not only on crystal interfaces, but also for interfaces in complexes. It gives you the ASA and an estimate of the interaction energy, list hydrogen bonds and salt bridges