[ccp4bb]: Problem to find a suitable solution by MR method

["Yunqing Liu" <yqliu@sibs.ac.cn>]

***  For details on how to be removed from this list visit the  ***
***          CCP4 home page http://www.ccp4.ac.uk         ***

Dear all:
Does anyone experience or know some structure determination cases by molecular replacement method that AmoRe program helps to find the correct solution after CNS program fails to find a suitable one?
I have a starting model which is 50% identity and 70% positive to my protein in the primary sequence. In my protein there is a big flexible domain. I fail to find a suitable solution with CNS program with the whole model or the partial model. So, I turn to AmoRe and try to change the variables in the ROTFUN of AmoRe program like following:

CELL_MODEL <a> <b> <c>            --- I think these parameters define the outer sphere in the Patterson vectors
SPHERE <Irmax>                     --- I think these parameters define the inner sphere in the Patterson vectors

But I still can't find a suitable solution to start my model building.  Here, I am eager for any advice from the structure determination communities who ever knows or experiences such problems.
Great Thanks!


　　　　　　　　Yunqing Liu
　　　　　　　　yqliu@sibs.ac.cn
　　　　　　　　　　2003-04-28