Skip to content

Mur Ligase Meeting May-June 2025 - Postponed #123

@Yuhang-CADD

Description

@Yuhang-CADD

Date: May 13th 2025 & June 10th 2025
Time: 2pm UK time, 13th May 2025, other timezones

Place: https://ucl.zoom.us/j/91379419977

Recording: N/A

Previous Meeting: #122
Who can come?: Anyone. No need to say anything unless you'd like to.

Apologies: @Yuhang-CADD

Decks: Please @opensourceantibiotics/murligase remember that if you share slides/info, to drag and drop those into a comment on this page, below. Very easy and saves @mattodd having to pester you.

Agenda:

Key things today are:

i) Multi-targeting compounds identified from Warwick and Atomwise collections. Updates on any new IC50 or crystallographic or microbiology data.

ii) New data from Warwick on the contributed AZ compounds (IC50s, MICs). Also, any updates on AZ compounds vs Mycobacterium? Need more samples?

iii) Update on crystallographic data of AZ compound 4 (WYH9 compound) in Pae MurD ligase (@scott) [how is the progress going, and whether need more samples?] & AZ5595 (WYH25 compound) in Pae MurC ligase (@LauraDS1 ) [actived site refined, suitable for docking, milestone progress!]

iv) @Yuhang-CADD has delivered the grid data of AZ compounds vs Eco (porin-deleted), Eco (WT), Pae (WT) as major priority **see grid of data here), waiting for Warwick team's IC50s and MICs as well as Crick team's ACC data to complete the paper.

v) @Yuhang-CADD designs for Multitargeting chapter & CC4CARB to announce.

(please add if you'd like to prioritise anything)

1) Multi-targeting Compounds from the Warwick/NEU Enamine Collection and Atomwise Compounds

  • @AJLloyd105 to update on further enzymatic screening of compounds from the Warwick Enamine Collection and Atomwise libraries, following discovery of the hits shown here.
  • @LauraDS1 to update on any soaking and/or co-crystallisation experiments with these compounds, following (last update here.
    Update on crystallography trials at The University of Kansas (Scott Lovell, via @bartrum): Compound J06 (Z2010503124).
  • @gfsfernandes to update on current research in design of improved binders vs TB murs. Note - new repository for this project at https://github.com/opensourceantibiotics/Series3-TB_MurLigase. In last meeting, @AJLloyd105 had tested the first batch of compounds from @gfsfernandes vs MurE. There was some inhibition of the coupled biochemical assay. High concentrations were needed, which raises queries about solubility (which should be measured for these compounds). Another assay was employed, with methylthioguanosine. We probably need SPR, or something else biophysical, though ADP-glo is also possible. Several compounds gave some evidence of inhibition (e.g. GF-62) and IC50s will be measured. It is possible that aggregation may also be affecting these compounds (@loriferrins shared https://www.ncbi.nlm.nih.gov/books/NBK442297/). @Yuhang-CADD will help send @gfsfernandes samples to Warwick.
  • In the last meeting @loriferrins and team (Sam Spijkers-Shaw, Thomas ("Tommy") Waltz-Chesnaye and Cole Iannuzzi (taking over from Tommy) reported. Compounds to be shipped to Warwick then AZ.

2) Multi-targeting Elaborated Fragments from Diamond Fragment Screen

3) Variants of AZ Compounds

These will include guanidinium and pyridinium derivatives to try to combat efflux.

  • @Yuhang-CADD AZ samples delivered, need to complete the grid data of AZ compounds vs Eco (porin-deleted), Eco (WT), Pae (WT) as major priority **
  • Accumulation assay - Crick team has finished testing Yuhang's AZ compounds against EcoK12 and has expressed Pae PAO1 for the next round of testing. Will have the full data soon in May.

4) New Protein Structures

Laura's new full length Pae MurC with WYH78 (AZ13) in the ATP binding pocket, waiting for full refinement and deposit into PDB. PDB list.

5) De Novo Computational Modelling

  • @mattodd to organise what is known of the competition compounds and what is needed to write the work up for publication.

@Yuhang-CADD has paused synthesis of @jhjensen2's originally-suggested compounds (last update was here while the AZ derivatives are being made.

6) CC4CARB Proposal (#93)

  • Successful! Next step plans discussed Dec 2024, awaiting further moves/notifications.

7) Misc/AOB

Last time @AJLloyd105 reported on the evaluation, enzymatically, of "double-headed" compounds containing uridine and ATP binders: . These were found to be binders and will be investigated further (need to upload deck). @AJLloyd105 to update as appropriate.

8) Mothballs (if no actions then these need to be linked in wiki and closed)

@mattodd is in the process of converting old items to the wiki

Next Meeting

8th July 2025

L'esprit de l'escalier

If you'd like to follow up after the meeting, please comment below. You can also email, but please be clear if anything in the email should not be public domain - the default is always open.

Metadata

Metadata

Assignees

Labels

Type

No type
No fields configured for issues without a type.

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions