Re: [PyMOL] Selecting Negative Residues

[DeLano S. <de...@de...>]

Buz,

This is something PyMOL didn't handle well until recently, but I think you
can now prefix the minus sign with a backslash in order to force PyMOL to
interpret the value numerically instead of as a range.

# create some negative residue identifiers

load $TUT/1hpv.pdb
alter chain A, resi=int(resi)-200
set seq_view

# test selections

indicate resi \-127

indicate resi \-136-\-129

A bit ugly, but it works!

Cheers,
Warren


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DeLano Scientific LLC
Subscriber Support Services
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-----Original Message-----
From: pym...@li...
[mailto:pym...@li...] On Behalf Of Buz Barstow
Sent: Thursday, August 21, 2008 12:32 PM
To: pym...@li...
Subject: [PyMOL] Selecting Negative Residues

Dear All,

Does anyone know how to select residues with negative sequence numbers in
Pymol?

I have a protein molecule with two residues with negative sequence numbers
(-2 and -1). When I issue the command:

cmd.select('temp', 'resi -2 and name CA')

Pymol selects the alpha carbons of residues -2 to +2.

How can I tell Pymol that I don't want to select a range?

Thanks, and all the best,

--Buz

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