Hi Harry,

Have you tried MAXIT from the PDB? It can be installed locally:

https://sw-tools.rcsb.org/apps/MAXIT/index.html

Best,

Nick Clark

Nicholas D. Clark (He/Him)
PhD Candidate
Malkowski Lab
University at Buffalo
Department of Structural Biology
Jacob's School of Medicine & Biomedical Sciences
955 Main Street, RM 5130
Buffalo, NY 14203

Cell: 716-830-1908


On Fri, Feb 23, 2024 at 7:36 AM Harry Powell <
0000193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote:

> Hi Martin, Marcin, Arturo, Avinash
>
> First off, I’m **NOT** saying that there’s anything wrong with the CIF
> files produced by these routes - just that AlphaFill doesn’t like them (it
> *does* like CIFs from AlphaFold -
>
> > alphafill process alphafold.cif filled.cif
> > 1DKE
>  =========-----------------------------------------------  14%
>
> But (while Alphafold models are wonderful, have put us all out of jobs,
> etc, etc) they are just a starting point for my project and, for this
> purpose, no good in themselves.
>
> Martin, Marcin - gemmi would be a good way to go, but -
>
> > >>> import gemmi
> > >>> structure = gemmi.read_structure('old.pdb')
> > >>> structure.make_mmcif_document().write_file('new.cif')
> >
> > alphafill process new.cif filled.cif
> > Structure file does not seem to contain polymers, perhaps
> pdbx_poly_seq_scheme is missing?
>
> > gemmi convert old.pdb gemmi.cif
> > alphafill process gemmi.cif filled.cif
> > Structure file does not seem to contain polymers, perhaps
> pdbx_poly_seq_scheme is missing?
>
> :-(
>
> Arturo - I’ve never scripted PyMol, but saving as CIF from the graphics
> interface -
>
> > alphafill process pymol.cif filled.cif
> > Structure file does not seem to contain polymers, perhaps
> pdbx_poly_seq_scheme is missing?
>
>
> Avinash - Maxit *might* work, but I fell at the first hurdle - although
> the help page says
>
> > Note: It is highly recommended to utilize binary distribution,
>
> it’s not obvious where to get this. So I download and try to build from
> source, and get (after unpacking and setting ENVs) -
>
> > make
> > Warning: this seems to be an unsupported operating system.
> >
> > Supported systems are:
> >   SunOS ...... version 4.1.x and 5.2 or higher
> >   Linux ...... any version
> >   SGI IRIX ... version 5.3-6.4
> > make: *** [Makefile:32: compile] Error 1
>
> which is odd, because this is a new Linux system installed this week
>
> > [hpowell@ld-mjeste3 maxit-v11.100-prod-src]$ more /etc/redhat-release
> > Rocky Linux release 9.3 (Blue Onyx)
>
> best wishes all
>
> Harry
>
>
>
> >
> > On 23 Feb 2024, at 11:55, Martin Malý <martin.maly...@email.cz> wrote:
> >
> > Dear Harry,
> >
> > You can try to read your PDB file and save it as mmCIF using gemmi:
> >
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgemmi.readthedocs.io%2Fen%2Flatest%2Fmol.html%23reading&data=05%7C02%7Cndclark2%40g-mail.buffalo.edu%7C211237fcc56e48de6bda08dc346bc149%7C96464a8af8ed40b199e25f6b50a20250%7C0%7C0%7C638442885643631876%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=kPhUsO0dv9gty%2F08hhxQw5IlXdJGu%2BkXlxyLUKYNLm4%3D&reserved=0
> >
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgemmi.readthedocs.io%2Fen%2Flatest%2Fmol.html%23id3&data=05%7C02%7Cndclark2%40g-mail.buffalo.edu%7C211237fcc56e48de6bda08dc346bc149%7C96464a8af8ed40b199e25f6b50a20250%7C0%7C0%7C638442885648007195%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=hWTaO6gd4gJkDaPGMB5e5cx5mCPaqpVKnrrNKcngeN4%3D&reserved=0
> >
> > Best wishes,
> > Martin
> >
> >
> >> Hi folks
> >>
> >> I am in the situation of having coordinates of apoproteins (i.e.
> polypeptide chains without prosthetic groups) in PDB format - but I need
> them in mmCIF format so I can run them through a locally built copy of
> AlphaFill.
> >>
> >> I need something I can install locally, so web services are a no-no.
> >>
> >> I’ve tried obabel and Coot to convert the PDB to mmCIF, but AlphaFill
> doesn’t like the files produced. Before I spend time searching through
> available options on the interweb, does anyone know of a utility that can
> provide me with suitable mmCIFs? Note that I *only* have the coordinates
> because they come from modelling.
> >>
> >> I’m assuming that I’ve run obabel and Coot correctly!
> >>
> >> obabel:
> >>
> >>> alphafill process protein_obabel.cif  filled.cif
> >>> Structure file does not seem to contain polymers, perhaps
> pdbx_poly_seq_scheme is missing?
> >>
> >> Coot:
> >>
> >>> alphafill process protein_A-coot-0.cif filled.cif
> >>> Error reading file ‘protein_A-coot-0.cif'
> >>>  >> parse error at line 2: This file does not seem to be an mmCIF file
> >>
> >> Harry
> >> ########################################################################
> >>
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