Hi Sergei

I assume that you used the term "drug-like fragments" because you would like to 
sort out candidates? The paper referenced by Bernhard is a good way to go, but 
it reflects exactly the problem of PPIs, namely that proteins with well defined 
binding pockets for substrates (such as kinases) are easily recognized while 
the algorithm has problems finding pockets of other PPIs.

I get the feeling that a more directed approach is to test the fragments in 
vitro rather than by simulation. The thought behind is to select for fragments 
that show measurable effects with fast and material-saving methods rather than 
focusing on putative pockets that might or not be recognized by your fragments.

A good example of such a work-flow is https://pubmed.ncbi.nlm.nih.gov/23344974/

best, matthias

[https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image.png]<https://pubmed.ncbi.nlm.nih.gov/23344974/>

Using a fragment-based approach to target protein-protein interactions - 
PubMed<https://pubmed.ncbi.nlm.nih.gov/23344974/>
pubmed.ncbi.nlm.nih.gov
The ability to identify inhibitors of protein-protein interactions represents a 
major challenge in modern drug discovery and in the development of tools for 
chemical biology. In recent years, fragment-based approaches have emerged as a 
new methodology in drug discovery; however, few examples of smal …




Dr. Matthias Barone

AG Kuehne, Rational Drug Design

Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)
Robert-Rössle-Strasse 10
13125 Berlin

Germany
Phone: +49 (0)30 94793-284

________________________________
From: CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> on behalf of Sergei Strelkov 
<sergei.strel...@kuleuven.be>
Sent: Monday, January 25, 2021 8:02:07 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] Characterising potential drug-binding pockets


Dear everyone,


In a drug discovery project where our aim is to interfere with some PPIs, we 
could obtain binding of drug-like fragments in several potentially interesting 
pockets on our target. We would like to make a projection on how promising 
these individual pockets are. One way of doing this is through the Sitemap 
program (Halgren, T. A. Identifying and characterizing binding sites and 
assessing druggability. J. Chem. Inf. Model 49, 377–389 (2009)). Are there 
other tools around to do this? In particular, we would like to have accurate 
numbers for the pocket volume, surface, no. of H-bond donors and acceptors, 
average hydrophobicity, etc etc.


Thank you,

Sergei




Prof. Sergei V. Strelkov Laboratory for Biocrystallography Department of 
Pharmaceutical Sciences, KU Leuven O&N2, Campus Gasthuisberg, Herestraat 49 bus 
822, 3000 Leuven, Belgium Phone: +32 16 33 08 45, mobile: +32 486 29 41 32 Lab 
pages: 
http://pharm.kuleuven.be/Biocrystallography<http://pharm.kuleuven.be/anafar>

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