Re: [ccp4bb] NCS axis detrmination

2017-06-30 Thread Eleanor Dodson
Old fashioned and basic, but why not just use the dot product cos (Diff) = l1 l2 +m1 m2 +n1 n2 where l m n are the direction cosines of the two rotation axes. The output of GESANT or LSQKAB give you the direction cosines. Any calculator will do the sum! Eleanor On 30 June 2017 at 03:06, Ge

Re: [ccp4bb] NCS axis detrmination

2017-06-29 Thread Genevieve Evans
Hi Vandra, For changes in a dimer when comparing two crystal forms, in addition to looking at the change in the NCS axis, you may want to consider the following software: DynDom S. Hayward, A. Kitao, H. J. C. Berendsen, "Model-Free Methods of Analyzing Domain Motions in Proteins from Simulation

Re: [ccp4bb] NCS axis detrmination

2017-06-29 Thread Zhijie Li
Hi Vandna, Assuming you have two copies, chain A and B. In UCSF chimera: 1) open two copies of the pdb (model #0 and #1) 2) in command line, type: match #1:.B@CA #0:.A@CA showMatrix true Besides moving model #1 chain B to model #0 chain A, the match command also outputs the r

[ccp4bb] NCS axis detrmination

2017-06-29 Thread Vands
Hi every one , I am looking for a tool to perfectly determine the NCS axis. I have two forms of crystals where diamer is with NCS but on a comparison of both forms, it looks like NCS axis is little off when i superpose two forms, i would like to measure rotation or translat

Re: [ccp4bb] ncs axis...

2011-11-25 Thread Tommi Kajander
yes, ok, i got it. one point should be enough since i have the direction of the axis direction from self rotation. just out-smarted myself. (not very difficult it appears... which i knew alraedy anyway...) -tommi On Nov 25, 2011, at 11:43 AM, Clemens Vonrhein wrote: > Hi Tommi, > > I'm

Re: [ccp4bb] ncs axis translation

2011-11-25 Thread Clemens Vonrhein
Hi Tommi, I'm not sure, but do you already have the mid-point and want to get RT operators only? Or do you have the rotational component and the translation is missing? In that case you could try GETAX (also available from the CCP4i gui) which takes the rotation as input (plus a rough description

[ccp4bb] ncs axis translation

2011-11-25 Thread Tommi Kajander
Hi, anybody have a script to to find a translation for 2-fold NCS (rotaion) axis based on the center of NCS symmetry..?? (ie to the midpoint of line between to heavy atoms) This search option doenst seem to be endoed anywhere (why??) ...stupid me... Thanks, tommi