It might be, because the mmCIF versions work fine with MG.

On Wed, 10 Nov 2021 at 12:16, Harry Powell - CCP4BB <
0000193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote:

> Hi folks
>
> Been a while, but I’ve been doing some work on checking that some files
> are valid PDB files and went back to the documentation; as far as I can
> work out, the best solution to this is John Walker’s, because “MODEL 0” is
> not allowed in the standard (maybe it is for mmCIF…) -
>
> > On 27 Aug 2021, at 16:39, John R. Walker <j.roman.wal...@gmail.com>
> wrote:
> >
> > I just change MODEL 0 to MODEL 1 then it works fine.
> >
> > John
>
> As far as I can see (from a small sample of the 150,000 AlphaFold models,
> soon to be a few more...) all the PDB files downloadable from
> alphafold.ebi.ac.uk are non-conformant. The documentation on PDB files
> that I have been able to find easily says -
>
> > Details
> >
> > * This record is used only when more than one model appears in an entry.
> Generally, it is
> > employed only for NMR structures. The chemical connectivity should be
> the same for each model.
> > ATOM, HETATM, SIGATM, SIGUIJ, ANISOU, and TER records for each model
> structure are
> > interspersed as needed between MODEL and ENDMDL records.
> >
> > * The numbering of models is sequential beginning with 1.
>
> Harry
>
> >
> > On Fri, Aug 27, 2021 at 11:03 AM Schreuder, Herman /DE <
> herman.schreu...@sanofi.com> wrote:
> > Dear Nick,
> >
> >
> >
> > I had just looked at a pdb downloaded from the alphafold server without
> problems. However, then I realized that I had looked at the alphafold model
> after I had it superimposed on my own structure. Loading the alphafoldmodel
> directly in coot failed for me as well.
> >
> >
> >
> > By looking into the pdb file, I discovered that the alphafold file has a
> “MODEL” record just before the coordinates and an “ENDMDL” record after the
> coordinates. After deleting these two records, the alphafold pdb loads fine.
> >
> >
> >
> > Hope this helps,
> >
> > Herman
> >
> >
> >
> > Von: CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> Im Auftrag von
> Nicholas Keep
> > Gesendet: Freitag, 27. August 2021 16:51
> > An: CCP4BB@JISCMAIL.AC.UK
> > Betreff: Re: [ccp4bb] A "funny" thing related to AlphaFold2 ....
> >
> >
> >
> > Has anyone made use of an Alpha Fold PDB as opposed to CIF.  On the half
> > dozen or so I have tried to read into CCP4mg or coot the PDB has always
> > failed but the CIF is fine.  I can then write out a PDB if I want.
> >
> > I could add to the conspiracy theories that this is EBI trying to
> > normalise use of CIF format, but I suspect it is something much more
> > mundane, that should be addressed.
> >
> > Best wishes
> >
> > Nick
> >
> > --
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-- 
Dr Jon Agirre
Royal Society Olga Kennard Research Fellow
York Structural Biology Laboratory / Department of Chemistry
University of York, Heslington, YO10 5DD, York, UK
http://www.york.ac.uk/chemistry/research/ysbl/people/staff/jagirre/
Office: /B/K/065 Phone: +44 (0) 1904 32 8252
Twitter: @glycojones
<https://york.ac.uk/open-research>

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