Well - there are various traps towards a MR solution. Maybe the data is not very good? What is the resolution and merging r factor?
Assuming data is ok... Most common is that the spacegroup is wrong. Have you tested all possible spacegroups for the Laura group? Both phaser and molrep have options to do this. If there are many copies in the asymmetric unit that could make it difficult.. You say it is a mutant - is the spacegroup and cell similar to the native protein? If that is so you could probably take the native molecule as the “solution” and start refinement from it. But sometimes a dataset has got mislabelled and is actually from a different source altogether. The simbad procedure can look for matches and sometimes finds an answer. Give me some more details of your project and perhaps I can help more. Eleanor On Thu, 3 Mar 2022 at 05:20, Shubhashish Chakraborty < 0000750c9a1ca48b-dmarc-requ...@jiscmail.ac.uk> wrote: > Hello, > I am trying to solve a dataset using molecular replacement. However, > neither Phaser MR nor Molrep can give any solution. > In Phaser, I have received an advisory that Top FTF has not packed. > I have tried molecular replacement using the wild-type protein at > different resolutions (I am working on a mutant). > Also, I have truncated the loops from the input structure. However, none > have worked. > So, what can be the possible way to solve this data set? > > Thank you > > Shubhashish Chakraborty > PhD JRF 2018 > Structural and Molecular Biology Lab (Varma Lab) > Advanced Centre for Treatment, Research and Education in Cancer (ACTREC) > Khargar, Navi Mumbai > E-mail: schakrabo...@actrec.gov.in > > ------------------------------ > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 > ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/
