Depends how you define "surface." If you mean "some other group of atoms"
then you can easily compute that at any time and even display it real time.
If you mean "isosurface" that, too, might be able to be done, but I might
have to add something to make that work.
By "rotatable" I presume you mean independently of that surface. That's not
a problem, and translation is part of it. You just use:
select protein
set allowRotateSelected TRUE
set dragSelected TRUE
Now you can use ALT-SHIFT-LEFT and ALT-LEFT to translate and rotate the
protein relative to the underlying surface atoms.
Now, say you want to update something as that happens. You will need to use
the latest development version of Jmol, because what I describe next is not
in Jmol 12.0. We have a callback called "atomMovedCallback" that can send a
message either to Jmol or to your page JavaScript to do something. In this
case it would report the distance of "atomX" to the nearest atom of
"surfaceAtoms" where you have already defined them as, perhaps:
atomX = {22.ca} # CA for residue 22
surfaceAtoms = {not protein}
select protein
set echo top left
set atomMovedCallback "jmolScript:checkDistance"
function checkDistance() {
Var dmin = 1e10
for (Var x in {surfaceAtoms}) {
Var d = x.distance(atomX)
if (d < dmin) { dmin = d }
}
Var s = format("%3.1f Angstroms", dmin)
echo @s
}
Something like that!
Bob Hanson
On Wed, Jun 15, 2011 at 7:13 AM, Martin Hediger <[email protected]> wrote:
> Dear Jmol Users, I'm new to the Jmol list, I'm looking forward to a nice
> community interaction.
>
> I would like to implement the following on a website:
> A protein structure should be displayed and it should be rotatable by
> the user. At the same time, the distance between a given point in the
> structure (e.g. a residue alpha-C atom) and a surface "below" the
> structure should be computable (once the structure is oriented the way
> it should be. The background is that we want to model a binding event of
> a protein on a nanowire surface, so the orientation of the molecule is
> critical.
>
> How could I achieve this?
>
> Kind regards and thank you for answers.
> Martin
>
>
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--
Robert M. Hanson
Professor of Chemistry
St. Olaf College
1520 St. Olaf Ave.
Northfield, MN 55057
http://www.stolaf.edu/people/hansonr
phone: 507-786-3107
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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