Vladyslav

I would be very interested in seeing the PDB report that you received. If
you wish to share, please send it directly to me.

Cheers

Nigel

---
Nigel W. Moriarty
Building 33R0349, Molecular Biophysics and Integrated Bioimaging
Lawrence Berkeley National Laboratory
Berkeley, CA 94720-8235
Email : nwmoria...@lbl.gov
Web  : CCI.LBL.gov
ORCID : orcid.org/0000-0001-8857-9464


On Thu, Aug 17, 2023 at 10:25 AM Oganesyan, Vaheh <
vaheh.oganes...@astrazeneca.com> wrote:

> Whatever it is worth, I agree with Dale. I see those “Major validation
> issues” all the time. Some structures at medium resolution (2-3A), and some
> are at high (1.1-1.4A). Not all Arg residues are “in violation”. At low and
> medium resolution cases it is hard to argue. But high resolution electron
> density maps are showing correct fit, yet those Arg are called an “issue”.
> Fixing restrains for all Arg is not right solution. Embracing the
> difference and understanding why those are different feels like scientific.
>
>
>
> Thank you.
>
>
>
> *Vaheh Oganesyan, Ph.D.*
>
> *R&D* *| Biologics Engineering*
>
> One Medimmune Way, Gaithersburg, MD 20878
>
> T:  301-398-5851
>
> *vaheh.oganes...@astrazeneca.com <oganesy...@medimmune.com>*
>
>
>
>
>
>
>
> *From:* CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> * On Behalf Of *Vladyslav
> Yadrykhinsky
> *Sent:* Thursday, August 17, 2023 11:44 AM
> *To:* CCP4BB@JISCMAIL.AC.UK
> *Subject:* Re: [ccp4bb] How to fix ARG planarity outliers?
>
>
>
> Hello,
>
>
>
> Thank you for your feedback.
>
> Yes, I meant those that appear in pdb validation report.
>
>
>
> I will try to inspect surrounding residues as well as run with suggested
> keywords and let you know how it went.
>
>
>
> Thank you!
>
>
>
> Best regards,
>
> Vladyslav
> ------------------------------
>
> *From:* CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> on behalf of Keitaro
> Yamashita <kyamash...@mrc-lmb.cam.ac.uk>
> *Sent:* Thursday, August 17, 2023 5:03:00 PM
> *To:* CCP4BB@JISCMAIL.AC.UK <CCP4BB@JISCMAIL.AC.UK>
> *Subject:* Re: [ccp4bb] How to fix ARG planarity outliers?
>
>
>
> Hi,
>
> I assume the planarity you mentioned is what is discussed in Moriarty
> et al (2020) https://doi.org/10.1107/S2059798320013534
>
> As shown there, it is known to have some deviation. In Refmac (or in
> the CCP4 monomer library) it is restrained using a torsion angle with
> 5 degree sigma instead of the planarity restraint. You can tighten the
> restraint using an even smaller sigma. The keyword could be:
>
> restr tors include resi ARG name chi5 sigma 2.0
>
> By the way, did you mean by "outliers" those from the PDB validation
> report? I have had a feeling that their criterion is a bit too strict.
> Could anyone from the PDB tell how the outlier of the ARG sidechain is
> calculated?
>
> Best regards,
> Keitaro
>
> On Thu, 17 Aug 2023 at 15:02, Vladyslav Yadrykhinsky
> <vladyslav.yadrykhin...@student.uib.no> wrote:
> >
> > Hello,
> >
> > I am refining a structure and I have ARG planarity outliers in the
> sidechain.
> > Could someone please tell me how should I set the planarity restraint in
> REFMAC5 (version 5.8.0403) to correct them?
> >
> > Should I use: plane [value1] [value2] in the advanced settings? If so,
> what values 1 and 2 should be? My current weight restraints are 0.128....
> >
> > Please let me know if you need more information and I will appreciate
> any assistance on the matter.
> >
> > Best regards,
> > Vladyslav
> >
> > ________________________________
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