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The Datafile PD-CD 5
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rasmol
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scipts
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antibody
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!Antibody
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AB2_TXT
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1996-03-03
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This document has the following sections:
INSTALLATION OF RASWIN SCRIPT
OPERATION OF SCRIPT
SCRIPT SPEED/PACING/TIMING
SCRIPT REVISION HISTORY
- - - - - - - - - - - - - - - - - - - - - - - - - - -
INSTALLATION OF RASWIN SCRIPT
Each script consists of a top level script plus many
subscripts and some PDB files. It is therefore
advisable to install each script in a separate
subdirectory. For example, assuming you have installed
the RasWin program files in C:\RASWIN, the script ANTIBOD2.TOP
could be installed in C:\RASWIN\ANTIBOD2.
To do this, copy the packed file AB2ZIP.EXE into the
desired subdirectory, and then run it as a DOS program
at the DOS prompt (which will unpack it).
Now run Windows. In Windows, with the RasWin icon
selected, select File, Preferences, and change the
Working Directory to the one containing the unpacked
script files. (If you want access to RasWin's built-in
help, you must also copy RASWIN.HLP into the working
directory.)
If you have several scripts, you may wish to create a
separate RasWin icon for each. This would enable you
to change scripts smoothly during a lecture, without
changing the working directory. With the RasWin icon
highlighted, select File, Copy. Now use File,
Properties to change the working directory to the one
for the script, and the Description (which will appear
under the icon) to the script name. Thus you will end
up with a script-name-labeled RasWin icon for each
script.
If you wish, you can even configure the Properties to
run the script automatically when the icon is
double-clicked. To do this, put '-script antibod2.top'
after RASWIN.EXE in the Command Line slot of the
Properties box. [WARNING: there is a bug in RasWin
beta 2.6. Scripts started in this way terminate at the
first pause, returning the RasMol> prompt. Therefore,
scripts will have to be run manually, with a 'script
antibod2.top' command in the command window, until this is
fixed.]
OPERATION OF SCRIPT
ANTIBOD2.TOP is the top-level script. Start it by typing
'script antibod2.top' in the RasWin command line window,
then pressing Enter.
This script has frequent pauses. Press the spacebar to
continue. During the initial portion of the script,
prior to the display of the F(ab')2, you are encouraged
to rotate each image with the mouse before proceeding.
Once the F(ab')2 appears, it is best not to rotate the
image manually as subsequent views make assumptions
about the previous orientation of the molecule. After
the all-magenta representation of lysozyme appears, it
is OK to rotate manually again, as the 'discontinuous'
and 'flat' views of the lysozyme epitope are
re-oriented properly by the script. If you are
projecting this script in a lecture, it is best to do a
practice run without manual rotation (so you can see
the intended views), then re-run the script and try
rotating images. By such practice runs you can
optimize your rotation strategy.
If you need a shorter script for a lecture, sections
can be omitted by editing the file ANTIBOD2.TOP. You
can run each .SCR file manually (e.g. 'script
igdomain.scr') to see what it does. Insert '#' at the
beginning of each script line you wish to omit (this
converts it to a comment).
SCRIPT SPEED/PACING/TIMING
RasWin32 beta 2.6 (the 32 bit program) is several times
faster than RasWin 2.6 (the 16 bit program). To run
RASWIN32 you may need a Windows accessory package which
is provided free by MicroSoft. For details see:
http://www.umass.edu/microbio/rasmol/getras.htm
Script execution speed is affected by the speed of your
computer, the speed of your graphics card, the screen
resolution, and the size of the RasWin graphics window.
Starting with a full-screen graphics window, you can
speed up execution by reducing the resolution from
1024 x 768 to 800 x 600 to 640 x 480 pixels. This is
usually done with a SetRes (or related) icon in the
Windows Control Panel. Further increases in speed can
be obtained by reducing the size of the graphics window
(to less than full-screen). Quick previewing of scripts
can be done very quickly in a tiny graphics window.
REVISIONS OF SCRIPT
1/29/96: (ANTIBODY.TOP, the original version which
preceded ANTIBOD2.TOP.) To work around a bug
identified by Roger Sayle, reduced ssbonds commands in
S-S.SCR and IGG1-A.SCR from 300 to 200. This should
prevent the 'Unhandled exception' crash observed by
several people. If anyone still experiences this
problem, try reducing the 200's to 150's.
3/3/96: Completed revisions and released ANTIBOD2.
This revision includes the whole IgG1 molecule
structure provided by Eduardo Padlan, and shows
the carbohydrates and their linkages to the protein.
Additional small rotations were inserted at frequent
points; thus, manual rotation is less necessary
during lecture projections. This version is likely
to be too slow with the 16-bit version of RasWin;
use the 32-bit version!
-Eric Martz
emartz@microbio.umass.edu