This sort of information is summarised on the MSDpisa site
http://www.ebi.ac.uk/msd/
Eleanor
U Sam wrote:
In this connection I like to know how symmetry (in degrees and
translation) is calculated between two or more molecules in the
asymmetric unit (A.U.).
Suppose if I download a PDB then I like to know the symmetry axis and
center coordinate of symmetry axis between two or more molecules in A.U.
Thanks
------------------------------------------------------------------------
Date: Sun, 8 Jul 2007 09:45:30 +0800
From: [EMAIL PROTECTED]
Subject: Re: [ccp4bb] how to convert matrix to angle
To: CCP4BB@JISCMAIL.AC.UK
Thanks a lot.
You are so kind.
On 7/7/07, *Kay Diederichs* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Jiamu Du schrieb:
> Dear all:
> I want to calculate the rotation angle between two similar
domains. By
> using Coot, I can superposr the two domain and get the
rotation matrix.
> But how to convert this matrix to an angle. Is there any
program can
> calculate this ?
> Thanks.
>
Jiamu Du,
If you have the rotation matrix
a11 a12 a13
a21 a22 a23
a31 a32 a33
then
(a11 + a22 + a33 - 1) / 2
is the cosine of the angle you're looking for.
HTH,
Kay
--
Kay Diederichs
http://strucbio.biologie.uni-konstanz.de
email: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> Tel +49 7531 88 4049
Fax 3183
Fachbereich Biologie, Universität Konstanz, Box M647, D-78457
Konstanz
--
Jiamu Du
State Key Laboratory of Molecular Biology
Institute of Biochemistry and Cell Biology Shanghai Institutes for
Biological Sciences
Chinese Academy of Sciences (CAS)
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