Hello, is it definitely due to the TLS refinement? I guess you have tried 
without TLS and don't see the same effect i.e. the B-factors are more 
consistent. It would be good to know.

Best wishes, Jon Cooper. jon.b.coo...@protonmail.com

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-------- Original Message --------
On 2 Aug 2023, 15:42, Thomas, Leonard M. wrote:

> Hello All,
>
> A general questions though phenix.refine is being used for refinement. A 
> student I am working with has a structure that was solved and initially 
> refined using TLS and NCS parameters. They were given the structure to gain 
> some experience in refinement and they have been asking me some questions, I 
> was not involved in the initial work. While everything seems to be happy and 
> the model is correct with good refinement statistics for the most part one 
> thing that I am unsure of is some of the heavier atoms (Phosphate and Sulfer) 
> have very high temperature factors when looking at individual residues or 
> ligands. The temperature factors are at least twice as high as the lighter 
> atoms they are associated with.
>
> I am at a loss to explain what is going on, I really have not used TLS 
> refinement a lot so there is that. Resolution is about 2.5 angstroms with 
> good completeness.
>
> Thoughts?
>
> Thank You in advance
> Len Thomas
>
> Leonard Thomas, Ph.D.
> Biomolecular Structure Core, Director
>
> Oklahoma COBRE in Structural Biology
> Price Family Foundation Institute of Structural Biology
> University of Oklahoma
> Department of Chemistry and Biochemistry
> 101 Stephenson Parkway
> Norman, OK 73019-5251
> Office: (405)325-1126
> lmtho...@ou.edu
> http://www.ou.edu/structuralbiology/cobre-core-facilities/mcl
>
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