Messages

1

MD simulations / Clarification on how DNA radius is computed from 3DNA/DSSR

« on: February 03, 2026, 08:21:48 am »

Dear Xiang-Jun,
I am using 3DNA to analyze DNA structures from molecular-dynamics simulations.
I get the standard 3DNA output files with base-pair and helical axis information.

I want to calculate the DNA radius from these 3DNA results.
Could you please tell me:

Which output values or parameters from 3DNA should be used to compute the DNA radius, and how exactly should it be calculated from the 3DNA analysis?

Thank you.

Best regards,
Mamta Yadav

2

MD simulations / Re: overwritten output files

« on: January 13, 2025, 10:00:17 am »

Hi Xian- Jung,
thanks for your quick response.
I use the simple script of 3dna -
 for i in $(seq 1 3700); do
    find_pair output-filename.pdb.${i} frame${i}.bps
    analyze frame${i}.bps
done

Thanks
Mamta

3

MD simulations / overwritten output files

« on: January 13, 2025, 04:52:30 am »

Dear all,
I am analyzing the helical parameters of DNA using 3700 frames from my MD simulation, with each frame having a corresponding `.bps` file. When using a `for` loop with the `analyze` command, the output is being overwritten instead of being saved in separate files for each frame.I am using x3dna-v2.4 version. Is it possible to configure the program so that it records the data for all frames without overwriting the output?                                                                                                              Thanks for your help!
Mamta