Re: [ccp4bb] Problem with getting protein-inhibitor complex structure

2010-08-28 Thread Tzu-Ping Ko
Hello, If the data are being collected at cryogenic temperatures and no inhibitor has been included in the cryoprotectant, perhaps the inhibitor would diffuse out of the active site? Ping + T z u - P i n g K o < kotp...@gate.sin

[ccp4bb] how to tie waters in refmac

2010-07-18 Thread Tzu-Ping Ko
Dear CCP4BB users: Thanks to Dr. Murshudov's instructions, I can now tie the waters to their original positions. There are 230 water mols in my model. I did: 1. make a file (eg harmonic.key) that says: external harmonic residues from 1 X to 230 X sigma 0.2 2. select harmonic.key in the "include

[ccp4bb] how to tie water mols in refmac

2010-07-16 Thread Tzu-Ping Ko
Dear CCP4BB users: I have recently switched to use REFMAC5 instead of CNS in the final refinement of a structure. The TLS method gave much better R/Rfree values than did CNS (17/22 vs 25/28 at 2A). In CNS there is a harmonic term to tether some specified atoms to their original positions. I use t