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: [log in to unmask]
> Subject: Re: [ccp4bb] how to convert matrix to angle
> To: [log in to unmask]
>
> Thanks a lot.
> You are so kind.
>
>
>
> On 7/7/07, *Kay Diederichs* <[log in to unmask]
> <mailto:[log in to unmask]>> 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: [log in to unmask]
> <mailto:[log in to unmask]> 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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