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Re: [ccp4bb] how to convert matrix to angle
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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999
Previous message:
Subject: Re: Kay Diederichs Email
From: James Stroud jstroud {- at -} MBI {- dot -} UCLA {- dot -} EDU
Date: 2007-07-07		Next message:
Subject: Re: how to convert matrix to angle
From: "Das, Debanu" debanu {- at -} SLAC {- dot -} STANFORD {- dot -} EDU
Date: 2007-07-07


Subject: Re: how to convert matrix to angle
From: Jiamu Du jiamudu {- at -} GMAIL {- dot -} COM
Date: 2007-07-07

Thanks a lot.
You are so kind.



On 7/7/07, Kay Diederichs 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: Kay.Diederichs@uni-konstanz.de 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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