Re: [ccp4bb] Extra positive density seen after TLS refinement?

2012-02-18 Thread Ethan Merritt
On Saturday, 18 February 2012, Naveed A Nadvi wrote: > Dear crystallographers, > > > > I am fairly new in crystallographic work and structure determination, but I > thought this would be the best place to post my questions. We had collected > structural data for a protein that diffracted to 3

[ccp4bb] question about input .hkl file for SHELXD

2012-02-18 Thread Lu Yu
Hi, I was confused with the input .hkl file for SHELXD. I was using ccp4 to prepare these files, and I am not sure whether I was doing it correctly. 1st I did scale2mtz to generate .mtz file 2nd I used mtz2various to convert .mtz to .hkl format. I also found a program prephadata which can convert

Re: [ccp4bb] Extra positive density seen after TLS refinement?

2012-02-18 Thread Nian Huang
MolProbability score doesn't mean too much in your case, since you are essentially using a 1.5 A model against a 3 A database. The differences in the blobs might caused by the different delta sigma settings when you were viewing these two models. I have successfully used TLS for a 3 A dataset befor

[ccp4bb] a question for PDB_extract for RCSB depositation

2012-02-18 Thread Dialing Pretty
Dear All, For the PDB_extract, one item to be filled is "Deposit Structure Factor Used for Final Refinement". If this way the structure factor which could be downloaded from RCSB after depositation will be not the final structure factor corresponding to the final deposited PDB file, as for wha

[ccp4bb] [ccp4]questions about SHELXD

2012-02-18 Thread Lu Yu
Hi all, I was trying to use SHELXD program for protein peptides (6-7 residues) for the very first time, and I got the .pdb file which should be the correct solution. However, in the .pdb file, the atoms are labeled as ABC and they are not recognized as amino acids. My question is normally what pr