Hello CCP4bb,

Based on suggestions from the members of CCP4bb, I used program Curves+ to check the bend (angle) in DNA.

I have given my DNA which has two strands and 13 bases each as an input. I got an output file where I can see other parameters inferred from the structure.

But I am getting a message at the end of the output file which I believe gives me answer for my question.

 (E) Groove parameters

    No groove analysis: P    absent in strand = 1 at level =  11

Please indicate to me what could be the error in this?

Thank you all for answers,

On Wed, Oct 22, 2014 at 2:20 PM, Tim Gruene <[log in to unmask]> wrote:

Dear Sasha,

you can select two pairs of three corresponding atoms at either end of
the stand and calculate the plane normal of each set. The angle between
the normals would be the overall bend.

Best,
Tim

On 10/21/2014 09:53 PM, Sasha Pausch wrote:
> Hello CCP4bb,
>
> May I know how can we calculate or use any server which can calculate the
> overall bend in a DNA (crystal structure)?
>

--
Dr Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen

GPG Key ID = A46BEE1A