Re: [ccp4bb] MrBump and Balbes Molecular Replacement of multiple copies in ASU Failed even with high homology model

2016-11-01 Thread zaigham mahmood khan
Yes, Eleanor D. is right. I had a similar experience. MR did not provide me the solution with monomeric protein. However, when i used dimer as a search model, it appeared to be a low-hanging fruit afterwards. May be you have a similar situation, there are very less possibilities to explain

Re: [ccp4bb] MrBump and Balbes Molecular Replacement of multiple copies in ASU Failed even with high homology model

2016-11-01 Thread Eleanor Dodson
With such a lot of molecules, I would check for oligamers. Look at the MOLREP self rotation - is there anything obvious? Send the*.ps if you like and I can comment. And do the models form oligimers? If so search with that.. Eleanor And as Randy says - try PHASER .. On 31 October 2016 at

Re: [ccp4bb] MrBump and Balbes Molecular Replacement of multiple copies in ASU Failed even with high homology model

2016-10-31 Thread Randy Read
Dear Alex, We’ve had very good luck using Phaser to place large numbers of copies of good models. It’s in this kind of case where the increased sensitivity of the likelihood approach really helps. I would suggest trying the different choices of model as alternatives, and you might also want