[ccp4bb] CCPBioSim Industry Talk

2022-08-15 Thread Sarah Fegan - STFC UKRI
Dear all, Our next industry talk is on Wednesday 28 September 2022 at 2pm UK time. The speaker is John Liebeschuetz from Astex and his talk is "Do proteins ever strain drug-like ligands?" Details and registration at https://www.ccpbiosim.ac.uk/astex2022. If you had registered for the talk in

Re: [ccp4bb] circular peptide structure refinement

2022-08-15 Thread Matthew Snee
Hi All To prevent Phenix removing link records, you can use Readyset to create a parameters file based on LINK records, and feed it to the refinement program, otherwhise they are deleted. Best wishes Matthew. From: CCP4 bulletin board on behalf of Nicholas

[ccp4bb] Multiple AlphaFold DB jobs available at EMBL-EBI

2022-08-15 Thread David Armstrong
** *We are currently recruiting for several positions at the AlphaFold Protein Structure Database (AlphaFold DB)to join the Velankar team at the European Bioinformatics Institute (EMBL-EBI).* * These are exciting opportunities to work as part of EMBL and DeepMind's new partnership to make

[ccp4bb] Postdoc positions

2022-08-15 Thread Quyen Hoang
Hi All, My group has a couple of Postdoc positions available immediately to study the structures and functions of proteins associated with neurodegenerative diseases. The projects utilize cryo-EM and X-ray crystallography along with a battery of other biophysical and biochemical methods. As

Re: [ccp4bb] Quantifying electron density inside of a given volume

2022-08-15 Thread James Holton
There are several programs for integrating electron density, but please let me assure you that it is almost always the wrong thing to do. A much better strategy is occupancy refinement.  Throw in dummy atoms, turn off non-bonded interactions to them, and refine their occupancy until it a)

Re: [ccp4bb] Quantifying electron density inside of a given volume

2022-08-15 Thread Pavel Afonine
Hi James, I like your approach with dummy atoms and occupancy refinement. Dealing with actual maps sounds like hell to me indeed (especially given that we deal with weighted Fourier maps!). Reading this as someone who immediately translates this into a computer code (in my mind), a few things

Re: [ccp4bb] Quantifying electron density inside of a given volume

2022-08-15 Thread Jessica Bruhn
Hi all, There are lots of great suggestions in this thread. I will just add a little trick from small molecule crystallography: when trying to estimate how many atoms can fit in a given volume, you can use the Rule of 18. Take the volume of interest in Angstroms^3 and divide it by 18 Angstroms^3.