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Thanks for those which answer to my question. I am posting here again
the original question, followed by a summary of the suggestions.
_____________________
Dear colleagues,
I just solved a structure by SAD using a soaked crystal with NaI, on a 2.1A
dataset, spacegroup C2. Using this dataset I partially constructed a model.
Now I would like to extend the phases to a native dataset which was
processed at 1.95A resolution, spacegroup also C2. Which is the correct way
to do this and still be able to use my partially constructed model?
Thank you all in advance,
Mario Sanches
_____________________
Bernhard Rupp suggested using Arp/Warp, which I did. Unfortunately it
crashes. I tried using the native dataset only and "start from a
existing model" and also run DM after importing the phases from the NaI
derivative and feed these dataset to Arp/Warp. In both cases Arp/Warp
starts the construction so as the "Cycle 0" has a few aminoacids and in
the "Cycle 1" it throws all residues out and finally fails.
Debanu Das suggested to run Resolve. It is still running and apparently
it is working. The best cycle up to now is the first one, with 197 out
of 372 residues built and 46 docked to the sequence.
As my native and derivative datasets are slightly non-isomorphous I
didn't try to refine the model against the native dataset in Refmac, as
suggested by Ramanathan Natesh and Ana Gonzalez.
Finally,I run a molecular replacement (as suggested by Ana Gonzalez and
Debanu Das) using the partial model against my native dataset. It worked
greatly and I am now finishing the model building.
Thanks for all the answers.
Mario Sanches
