On Nov 1, 2005, at 5:51 p, adriano ceccarelli wrote:

Hi Tim,

I have downloaded the SPV and done the job, but I had to rely on the "quick fit" built in alignment because it was really impossible to do it by hand. However now I have the file I wanted and the animation in Jmol playing. It is still a bit "jumpy", and also there is no possibilty to animate the hypothetical incoming and outgoing objects, such as Ca ions, ATP, ADP etc....but I think students might like it.
So, many thanks for your suggestions.

hi Adriano,

if you are using the anim command to implement your animation, check out <http://www.stolaf.edu/people/hansonr/jmol/docs/#animation> for some helpful tweaks. especially see the fps.

to animate the movement of a ligand, you would need to model it in each pdb file, then align the structures based only on the backbones of the protein. Jmol can't do this, you're right. you might look around for some energy minimization tools or molecular modeling software.

there are ways to fake it purely for the visual effect. for example, you could increase the diameter of the ligand in each successive frame of your animation, so that it seems to fade into view. far from scientifically accurate, of course, but it does draw attention.


regards,

tim



Il giorno 29/ott/05, alle ore 16:55, Timothy Driscoll ha scritto:


On Oct 29, 2005, at 10:04 a, adriano ceccarelli wrote:



Tim,
many thanks. I tried and in principle it works beautifully. Unfortunately the models are all placed and rotated differently, so it would be reeeeeeeally difficult to get a smooth animation. Unless, of course, there are some trick I am unaware of.....:-))




hi Adriano,

ah; you need to align the structures first. Jmol can not do this, but try SwissPdbViewer or VMD. SPV can load multiple models, align them, and export as a multiple-model file that you can then open and animate in Jmol. I don't know much about aligning in VMD, except that it can be done.

best,

tim




Il giorno 29/ott/05, alle ore 01:35, Timothy Driscoll ha scritto:




On Oct 28, 2005, at 7:17 p, adriano ceccarelli wrote:






Hi all,
I would like to display sequentially the various states for which the Ca2+ pump has structures available ina kind of animation. I have read the archives about the possibility obtaining an animation of multiple files but I am a bit confused. How do I get a "concatenated PDB file" ?







hi Adriano,

pretty easy:

1. create a new text file.
2. open one of your structure files and copy the entire contents.
3. paste into the new text file from (1).
4. surround with MODEL # and ENDMDL, like this:

MODEL 1
ATOM...
ATOM...
...
ENDMDL

5. repeat steps 2-4 for each desired structure. end result:

MODEL 1
ATOM...
ATOM...
...
ENDMDL
MODEL 2
ATOM...
ATOM...
...
ENDMDL
MODEL 3
ATOM...
ATOM...
...
ENDMDL
...


in Jmol, each structure can now be accessed using model or (IIRC) frame. see Bob Hanson's script doc for usage details (<http://www.stolaf.edu/people/hansonr/jmol/docs/>).


hope that helps!

tim
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