Hi Faisal,
There are no clearly defined targets for rmsd because it is the rms of
values with different standard deviations. You should use rmsZ instead
(reported by Refmac) because the deviations are on the same scale. For rmsZ,
any value below 1.0 is fine if it gives you the best fit with the data. I
would not recommend aiming for a specific value.
HTH,
Robbie
> -----Original Message-----
> From: CCP4 bulletin board [mailto:[log in to unmask]] On Behalf Of
> Faisal Tarique
> Sent: Wednesday, June 04, 2014 22:53
> To: [log in to unmask]
> Subject: [ccp4bb] ideal rms bond and rms angle
>
> Dear all
>
> I request you to please tell me the ideal rms bond and rms angle for a
> perfectly refined structure..As we can see in order to have optimum R and
> Rfree we often adjust the weighing factor in Refmac so as the R and Rfree
> changes it brings changes in rms bond and rms angle as well..Does the
quality
> of a structure depends upon the value of these rms deviation ? And what is
> the ideal value for these ?
>
> --
> Regards
>
> Faisal
> School of Life Sciences
> JNU
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