Re: [ccp4bb] phaser: high z score but no sol

2012-04-20 Thread Francis E Reyes
P21.. You sure about this space group? (very high confidences for space group and laue group in pointless?) F On Apr 19, 2012, at 12:20 AM, LISA wrote: > Hi all, > > I am trying to solve one structure by molecular replacement with phaser in > CCP4. This a complex of a multi-domain domains

Re: [ccp4bb] phaser: high z score but no sol

2012-04-20 Thread Bosch, Juergen
L.AC.UK> Subject: [ccp4bb] phaser: high z score but no sol Hi all, I am trying to solve one structure by molecular replacement with phaser in CCP4. This a complex of a multi-domain domains with small ligand. I have structues of this protein in apo state and with other similar ligand. The space

Re: [ccp4bb] phaser: high z score but no sol

2012-04-19 Thread Herman . Schreuder
, 2012 8:20 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] phaser: high z score but no sol Hi all, I am trying to solve one structure by molecular replacement with phaser in CCP4. This a complex of a multi-domain domains with small ligand. I

Re: [ccp4bb] phaser: high z score but no sol

2012-04-19 Thread Ed Pozharski
As Randy pointed out, you should check Patterson map for off-origin peaks. There is also a small chance that you actually have P2 - systematic absences may result from tNCS nearly colinear with crystallographic axis. On Thu, 2012-04-19 at 14:20 +0800, LISA wrote: > Hi all, > > I am trying to sol

Re: [ccp4bb] phaser: high z score but no sol

2012-04-19 Thread Randy Read
Hi, My first guess would be that this crystal possesses translational NCS, and that you're using the "old" (distributed with current old CCP4) version of Phaser that can't handle tNCS. You can tell if this is the case by looking at whether there's a large off-origin peak in the native Patterso

Re: [ccp4bb] phaser: high z score but no sol

2012-04-18 Thread Vellieux Frederic
Hi, If you have the correct solution, clashes may be due to loops. It may be an idea to clip these off for the molecular replacement calculations (loops might be shorter in the structure-to-be-solved than in the search model, they may have different conformations in the structure-to-be-solved

[ccp4bb] phaser: high z score but no sol

2012-04-18 Thread LISA
Hi all, I am trying to solve one structure by molecular replacement with phaser in CCP4. This a complex of a multi-domain domains with small ligand. I have structues of this protein in apo state and with other similar ligand. The space group of this crystal is P21. This crystal should have 4 mol