Thank you everyone for the help. I am sorry about phenix related question. But 
since the question was refinement related I thought it will be ok to ask on 
ccp4bb.

Thank you
Dhiraj
________________________________
From: Oleg Sobolev <[email protected]>
Sent: Monday, March 29, 2021 6:18 PM
To: Srivastava, Dhiraj <[email protected]>
Cc: [email protected] <[email protected]>
Subject: [External] Re: [ccp4bb] phenix refinement for bent DNA

Hi Dhiraj,

    I have structure with bent DNA. I am trying to refine the structure using 
phenix. do I need to turn off the DNA secondary structure restraints during 
refinement?
Application of secondary structure restraints depends on the quality of the 
experimental data. The most basic parameter to consider would be a resolution. 
For lower-resolution SS restraints might help to keep a reasonable geometry of 
the structure. The bent DNA should also work fine with SS since they are 
restraining base pairs and stacking pairs which normally don't distort too much.

P.S. There is a separate bulletin board for Phenix-specific questions:
http://www.phenix-online.org/mailman/listinfo/phenixbb

Best regards,
Oleg Sobolev.


Thank you
Dhiraj

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