Re: [ccp4bb] British X-ray Crystallographers

2023-05-24 Thread Harry Powell
Hi Jon “Preaching to the choir”! Harry > On 23 May 2023, at 23:16, Jon Cooper > <488a26d62010-dmarc-requ...@jiscmail.ac.uk> wrote: > > I am biased, but this looks like an interesting meeting: > > https://www.rsc.org/events/detail/76719/british-x-ray-crystallographers > > Best wishes,

Re: [ccp4bb] British X-ray Crystallographers

2023-05-24 Thread Harry Powell
gt; Boaz > > Boaz Shaanan, Ph.D. > Dept. of Life Sciences > Ben Gurion University > Beer Sheva, Israel > > On May 24, 2023 11:26, Harry Powell > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: > Hi Jon > > “Preaching to the choir”! > > Harry >

Re: [ccp4bb] British X-ray Crystallographers

2023-05-24 Thread Harry Powell
Hi Gerard I’ve mentioned it to the organiser - we shall see how long the Garmen will be there! Harry > On 24 May 2023, at 10:27, Gerard Bricogne wrote: > > Dear Jon, > > Quite a line-up indeed. > > Might someone at the RSC correct the typo in Elspeth's surname (in two > places)? Or

Re: [ccp4bb] British X-ray Crystallographers

2023-05-24 Thread Harry Powell
t; On 24 May 2023, at 10:17, Harry Powell > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: > > Hi Boaz > > No informaiton on the website about this but I have asked the organiser. > > Harry > >> On 24 May 2023, at 09:58, Boaz Shaanan wrote: >>

Re: [ccp4bb] Error in xdsgui: you have to install generate_XDS.INP in your path

2023-06-05 Thread Harry Powell
Hi David This is *exactly* what I did when implementing iMosflm’s double-clickable icons for Mac, Windows (“proper” Windows, not WSL, CygWin or MSYS) and Linux, many years ago… Since MacOS is based on (may well actually be, I can’t remember…) BSD UNIX, loads of shell things (nearly but not

Re: [ccp4bb] Cannot select any recommended SG for the protein BsAlaDH

2023-08-03 Thread Harry Powell
Apropos Phil’s last point - > > 4. On the model front, go find an AlphaFold model, they have worked for me > multiple times in molecular replacement so far. If there is no extant Alphafold model, it may be worthwhile creating your own via colabfold (duckduckgo it like I did…). Only takes a

Re: [ccp4bb] On the production of a two domain protein

2023-07-26 Thread Harry Powell
Hi Armando At the risk of appearing flippant, why not submit the sequence of the full-length protein to something like Alphafold (readily available to all via ColabFold (see https://colab.research.google.com/github/sokrypton/ColabFold/blob/main/AlphaFold2.ipynb)? I suspect that each of the

[ccp4bb] 1990s-style stereo viewer

2023-07-24 Thread Harry Powell
Hi folks I was wondering if anyone has a photo of the old-style head-mounted stereo viewers that used to be used to see 3D images from wall-eyed stereo pairs? I don’t mean the ones that were used to view the side-by-side stereo images that once appeared in printed journals, but the ones that

Re: [ccp4bb] 1990s-style stereo viewer

2023-07-24 Thread Harry Powell
gt; IGBMC > 1 rue Laurent Fries > 67404 ILLKIRCH - FRANCE > tel: +33 (0)3 69 48 52 82 > From: CCP4 bulletin board on behalf of Harry Powell > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> > Sent: 24 July 2023 16:58:26 > To: CCP4BB@JISCMAIL.AC.UK > Subject: [ccp4bb] 1990s-

Re: [ccp4bb] 1990s-style stereo viewer

2023-07-24 Thread Harry Powell
ed LCD-based shutter glasses connected with a wire > although awfully flickering with a switching frequency in the 8 Hz range! > Wim > > - Mail original - > De: "Harry Powell" <193323b1e616-dmarc-requ...@jiscmail.ac.uk> > À: "CCP4BB" > Env

Re: [ccp4bb] 1990s-style stereo viewer

2023-07-25 Thread Harry Powell
hand drew each vectors line by line - and my god that >> flickered awfully with “complex” objects. >> >> Adrian >> >> Sent from my iPhone >> >>> On 24 Jul 2023, at 18:53, Harry Powell >>> 193323b1e616-dmarc-requ...@jiscmail.ac.uk wro

Re: [ccp4bb] An unknown but strong positive electron density in my crystal

2023-08-11 Thread Harry Powell
Hi > Has anyone seen similar density to this before and/or can suggest how to > model this positive density? Many thanks. Romulan bird of prey? Harry > > Regards, > > Yue Li > > > > To unsubscribe from the CCP4BB list, click the following link: >

Re: [ccp4bb] Patenting ligand binding?

2023-07-28 Thread Harry Powell
I’m left wondering which aspects of the patent application are novel and haven’t already been published elsewhere in the list of references (which include a number of Tamir’s other papers). Others will know - can you patent something that you have already published in a paper? I try to steer

[ccp4bb] Macs, XQuartz, ccp4i2, Coot, iMosflm....

2023-07-28 Thread Harry Powell
Hi folks I note that the installation pages for ccp4i2 tell me that I need _exactly_ version 2.8.0 of XQuartz so that things like Coot, iMosflm, etc will work. The problem with that is that my TrueType fonts seem to have disappeared from XEmacs and I’m left with the spidery bit-mapped fonts (I

Re: [ccp4bb] PDB, mmCIF, chain ID

2023-06-21 Thread Harry Powell
to tell me that the chain ID in legacy PDB format in _atom_site.auth_asym_id in the mmCIF, and not in either of the two items I mentioned previously. best wishes and happy Solstice! Harry > On 9 Jun 2023, at 15:57, Harry Powell > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: &

[ccp4bb] choosing an NMR structure from PDB

2023-05-03 Thread Harry Powell
Hi folks I was wondering. If there is a UniProt entry (for example, P01132, but there are plenty of others) for which I want the “best” (whatever that might mean) representative _experimental_ structure (i.e. not one of these new-fangled predicted models that some folk say have removed the

Re: [ccp4bb] choosing an NMR structure from PDB

2023-05-03 Thread Harry Powell
if high-resolution restraints as RDCs had been used. > Recall that NMR structures are build using monomer libraries that are > seriously different from the x-ray ones. > > Best, > > > E. > > >> On 3 May 2023, at 11:45, Harry Powell >> <193

Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Harry Powell
Hi Marco Further to Pedro’s comment, one way to avoid missing data in cusps is to use a multi-sweep strategy for data collection (as championed by the good folk at Global Phasing over many years). Many of the problems encountered in structure solution can be traced back to a sub-optimal data

Re: [ccp4bb] what is isomorphous?

2023-12-21 Thread Harry Powell
Hi Didn’t Francis Crick have something to say about this in the early 1950s? I’m sure it was published but off the top of my mind I can’t think where (one of the more “established” members of this community will be able to give chapter and verse)! If you want to read something a little more

Re: [ccp4bb] RMSF calculation in pymol

2023-12-15 Thread Harry Powell
Hi Not PyMol, but relevant to the ccp4BB - why not try “gesamt” for this? e.g. for the nmr structure 1q01 - > gesamt pdb1q01.ent -s '/1/A' pdb1q01.ent -s '/2/A' pdb1q01.ent -s '/3/A' > -r0=1.5 -sigma=1.0 -o 1q01_cluster.cif -o-cf -a align.seq gives me an alignment of the first three models

Re: [ccp4bb] RMSD per residue graph for multiple aligned PDB files

2024-01-05 Thread Harry Powell
AFAIK the CCP4 tools “superpose” and “gesamt” both give tables of per-residue RMSD Harry > On 5 Jan 2024, at 10:49, Tomas Malinauskas > wrote: > > Dear All, > > I apologize for asking a somewhat off-topic question. > > I have multiple aligned PDB files loaded in PyMOL, each representing >

Re: [ccp4bb] Fragile Crystals

2023-11-23 Thread Harry Powell
Hi Well worth contacting your favourite (or favorite…) synchrotron about in-plate data collection - I’d imagine that APS has something in-place (there was a report way back in the depths of time [2015, when I still worked in the field…] about a prototype on ID-19?), and that might be easier to

Re: [ccp4bb] What could these crystals be?

2023-11-24 Thread Harry Powell
Hi I can’t see any (obvious) suggestions in the current list of answers to try room temperature diffraction before introducing cryoprotectants and cryocooling your crystals (but I might just have missed it). Often, just the act of changing the conditions that your crystals sit in will

Re: [ccp4bb] [ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-23 Thread Harry Powell
Nick > > > > -- Forwarded message - > From: Nicholas Clark > Date: Fri, Feb 23, 2024 at 8:03 AM > Subject: Re: [ccp4bb] mmCIF files from PDB format for AlphaFill > To: Harry Powell > Cc: Harry Powell > > > Hi Harry, > > MAXIT binar

Re: [ccp4bb] i2 won't accept 90 degree angles in moniclinic

2024-02-23 Thread Harry Powell
Hi Graeme (I may well have mentioned this when we shared an office) et al I’ll add something from my small-molecule crystallography days, when we used point detectors - so this would be pre-1996 which was the last time I used one of these machines. I don’t remember which structure it was (feel

[ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-23 Thread Harry Powell
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

Re: [ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-23 Thread Harry Powell
gt; > to convert pdb to mmCIF . Hope, it was usuful for your modelled coodinates. > > Regards > > Marta > > > > El 2024-02-23 12:32, Harry Powell escribió: > >> Hi folks >> >> I am in the situation of having coordinates of apoproteins (i.e. polypep

Re: [ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-23 Thread Harry Powell
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 >>

Re: [ccp4bb] [ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-26 Thread Harry Powell
Hi folks I’ve made considerable progress in getting to the bottom of this problem. From what I can gather, AlphaFold writes “modelCIF”, which is not quite the same as “mmCIF”, and just saying “CIF” is not unambiguous. So I guess I should have been more aware of this when posting my original

Re: [ccp4bb] Superimposition save as PDB for ccp4 refmac question

2024-02-28 Thread Harry Powell
Hi Marco You could always try the CCP4 tools (since this is the CCP4 BB…) “superpose” or “gesamt” to superpose (or is it “superimpose”? discuss…). Harry > On 28 Feb 2024, at 00:53, Marco Bravo wrote: > > Hello all, > Does anyone know how to save a superimposed pymol or chimerax session as a

Re: [ccp4bb] mmCIF files from PDB format for AlphaFill

2024-02-23 Thread Harry Powell
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

Re: [ccp4bb] Is there a bulletin board (similar to ccp4bb) for small molecule crystallography

2024-03-12 Thread Harry Powell
Hi Fred There *used* to be CCP14 (for small molecules and powders), but this lost funding many years ago. In the UK, I’d contact the National Crystallography Service at Southampton to see if they have any pointers to bulletin boards - I have a vague recollection of one but can’t remember the

Re: [ccp4bb] Rescale merged data?

2024-04-18 Thread Harry Powell
Hi Only comment is that (surely) any decent refinement program these days would down-weight any reflections with negligible I/sig(I) (for example, those in the “unobserved” high resolution regions) so that they do not contribute (significantly) to the refinement. Or am I wrong (I don’t mind

Re: [ccp4bb] Rescale merged data?

2024-04-19 Thread Harry Powell
” surprised, read “you could have knocked me down with a feather”. > On Thu, Apr 18, 2024 at 09:22:04AM +0100, Harry Powell wrote: >> Only comment is that (surely) any decent refinement program these days >> would down-weight any reflections with negligible I/sig(I) (for ex

Re: [ccp4bb] Microscope camera

2024-04-25 Thread Harry Powell
Hi Pat Depends on how much you want to spend. I’d start with a web search for “webcam astrophotography”, which should show options on how to remove a webcam’s lens and mount the cam (not the kens, of course!) on another optical instrument. Back in the day, I had a Philips webcam that had a

[ccp4bb] replacement for Scientific Linux

2024-04-26 Thread Harry Powell
Hi folks For many years I’ve been using Scientific Linux as my OS of choice (when not using my Mac) - but it’s been discontinued. SL was based on RHEL, and had useful things like a less-buggy Fortran/C/C++ compiler than that released by RH. What do people here recommend as a replacement?

Re: [ccp4bb] Lattice-translocation defect (LTD)

2020-02-12 Thread Harry Powell - CCP4BB
Hi Apropos Mosflm - if you have HDF5 files from ESRF (or Diamond, probably elsewhere) you can sum the images internally to whatever rotation range per pseudo image you want (so if you have, say, 0.05º physical images you could process 0.1, 0.15, 0.20º, etc), provided you have installed Mosflm

Re: [ccp4bb] AW: [EXTERNAL] Re: [ccp4bb] Lattice-translocation defect (LTD)

2020-02-12 Thread Harry Powell - CCP4BB
Hi Something else I should have mentioned - in iMosflm you can sum your images for viewing only if you have them as HDF5 or Pilatus CBF (as well as summing them for processing if you have HDF5). Harry > On 12 Feb 2020, at 10:18, Schreuder, Herman /DE > wrote: > > Hi Daniele, > > I agree

[ccp4bb] iMosflm/Mosflm and Eiger 2 images

2020-02-26 Thread Harry Powell - CCP4BB
/introduction.html <https://www.mrc-lmb.cam.ac.uk/harry/imosflm/ver730/introduction.html> As an aside, there are some subtle changes to the installed package in the CCP4 distro which mean that you can’t just swap in the new version. Harry

[ccp4bb] postponement of IUCr XXV to 2021

2020-03-26 Thread Harry Powell - CCP4BB
Hi folks I don’t know if this has been announced anywhere else yet, but this year’s IUCr meeting in Prague has been postponed to 2021 - see https://iucr2020.org/news/ I doubt this will be a surprise to anyone. Keep well Harry

Re: [ccp4bb] AW: [EXTERNAL] Re: [ccp4bb] modelling MET (methionine) and SME (met-sulfoxide)

2020-04-27 Thread Harry Powell - CCP4BB
Hi folks I can’t help feeling that if there are data extending to 0.97Å and there are multiple conformations/multiple components occupying the same region of (real) space/non-unity occupancies, the problem is crying out for SHELXL… Harry > On 27 Apr 2020, at 07:53, Schreuder, Herman /DE >

Re: [ccp4bb] Raw diffraction images for SARS-CoV-2 related structures

2020-03-19 Thread Harry Powell - CCP4BB
Hi > While those text files would be heavy, they'd be still lighter than raw > images and the whole useless white space they carry with them between > reflections. At the risk of extending this thread into a different direction, the "white space (the images) carry with them between

Re: [ccp4bb] Problems with iMosflm under CCP4i2

2020-09-01 Thread Harry Powell - CCP4BB
Hi folks Thank for the name-check Jon - I haven’t been employed on the Mosflm project since 2016, but it’s nice to be remembered. The place to look for a more definitive answer to the problem is in the date-stamped mosflm.lp file (called something like mosflm_202008319_124743.lp) which will

Re: [ccp4bb] Strange Pseudosymmetry Effects

2020-05-29 Thread Harry Powell - CCP4BB
Hi Tim You could send out an SOS to some of the other authors in the same issue, who might have kept a copy - several are “regular" posters on this forum, e.g. Sacha Urzhumtsev Gerard Kleywegt Eleanor Dodson There’s a good chance they’ll be stuck at home at the moment

Re: [ccp4bb] PDB file header lines...

2020-05-29 Thread Harry Powell - CCP4BB
ignored or a parser will throw an error. > > Cheers, > Robbie > >> -Original Message- >> From: CCP4 bulletin board On Behalf Of Harry >> Powell - CCP4BB >> Sent: Friday, May 29, 2020 16:57 >> To: CCP4BB@JISCMAIL.AC.UK >> Subject: [ccp

[ccp4bb] PDB file header lines...

2020-05-29 Thread Harry Powell - CCP4BB
Hi Is there something about “MODEL ” lines (i.e. five characters followed by a space) in PDB files that is completely beyond the pale? I’ve got some PDB files from a protein structure prediction server based in the US that Coot fails to read and that cause QTMG to crash on my Mac. I’ve

Re: [ccp4bb] Question about small molecule crystallography

2020-06-02 Thread Harry Powell - CCP4BB
Hi Just to echo what has been said before, and expand a little. (*) 5mm NMR tubes are wonderful for growing small molecule crystals in the way Artem describes - partly because they have _extremely_ smooth interior surfaces with few nucleation points - so you tend to get fewer, bigger

[ccp4bb] Can anyone hear me?

2020-09-21 Thread Harry Powell - CCP4BB
Hi folks SInce early last week I have had no messages from the BB - and also received a message telling me that I had been unsubscribed automatically because of bounced messages. I _should_ have now been resubscribed, but am not getting anything - and the BB is no longer on JISCMAIL’s list of

Re: [ccp4bb] Can anyone hear me?

2020-09-21 Thread Harry Powell - CCP4BB
even received my own message from the BB… Harry > On 21 Sep 2020, at 09:47, Harry Powell - CCP4BB > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: > > Hi folks > > SInce early last week I have had no messages from the BB - and also received > a message

Re: [ccp4bb] saturn 724 query

2020-10-28 Thread Harry Powell - CCP4BB
Hi I haven’t looked at this for a few years, but I can’t see why you couldn’t; as far as I remember, Mosflm reads Saturn images okay. You would probably need to do low and high resolution runs since the detector is (I think) only 72mm square. Best option would be to try with something like

Re: [ccp4bb] Quote source inquiry [SEC=UNCLASSIFIED]

2020-07-17 Thread Harry Powell - CCP4BB
nd users may think they just have bad crystals despite pretty > diffraction. > > So yes, there are people these days who collect powder data for wavelength > and beam position reference. > > Cheers, > > Tom > > > On 16/7/20, 9:26 pm, "CCP4 bulletin board

Re: [ccp4bb] AW: [EXTERNAL] Re: [ccp4bb] number of frames to get a full dataset?

2020-07-02 Thread Harry Powell - CCP4BB
Dear all I’ve been persuaded that MPR is a useful name (and see that there are shortcomings with both “multiplicity” and “redundancy") and I agree with much of what’s been said most recently in this thread. BTW, just because the Physics definition of a measurement/quantity/whatever is given

Re: [ccp4bb] Macports and Fink - failed building open source pymol on MacOS Catalina

2020-06-15 Thread Harry Powell - CCP4BB
Why not just use QTMG rather than Pymol? This is, after all, the _CCP4_ bulletin board… H > On 14 Jun 2020, at 23:56, Javier Gonzalez wrote: > > Thank you so much Vijaykumar and Kevin, it worked smoothly! > Best wishes, > Javier > > On Sun, Jun 14, 2020 at 5:04 PM Kevin Jin wrote: > My OS

Re: [ccp4bb] Any advice on specs for a new Mac Laptop to run CCP4 and other Xtal Software?

2020-06-08 Thread Harry Powell - CCP4BB
Hi I’d make the decision based largely on where I was going to use it, and how much I was going to have to carry it (and if I ever wanted to use it in coach class). If it was going to be my machine for “on the road”, I’d go for the 13” one, but if it was going to sit on my desk most of the

Re: [ccp4bb] Quote source inquiry

2020-07-16 Thread Harry Powell - CCP4BB
Hi Does anyone bother collecting a powder image (e.g. Si powder) these days so they actually have a reference that can be used to check both the wavelength and the beam centre? Or is this considered just something that old folk do? Harry > On 16 Jul 2020, at 12:19, Gerard DVD Kleywegt wrote:

Re: [ccp4bb] Quote source inquiry

2020-07-16 Thread Harry Powell - CCP4BB
s diffraction-free method, then a Si powder allows a precise calibration > of detector distance (and location of beam centre). > > > With best wishes, > > Gerard. > > -- > On Thu, Jul 16, 2020 at 12:25:55PM +0100, Harry Powell - CCP4BB wrote: >> H

Re: [ccp4bb] External: Re: [ccp4bb] AlphaFold: more thinking and less pipetting (?)

2020-12-08 Thread Harry Powell - CCP4BB
Hi It’s a bit more than science by press release - they took part in CASP14 where they were given sequences but no other experimental data, and did significantly better than the other homology modellers (who had access to the same data) when judge by independent analysis. There were things

Re: [ccp4bb] External: Re: [ccp4bb] AlphaFold: more thinking and less pipetting (?)

2020-12-08 Thread Harry Powell - CCP4BB
represents a typical spread of homologous > models in the PDB. So yes very competitive if you're desperate for a MR > starting model, but not quite yet there for a refined high-resolution > structure. > > Cheers > > -- Ian > > > On Tue, 8 Dec 2020 at 12:11, Harry Powell

Re: [ccp4bb] AW: [ccp4bb] External: Re: [ccp4bb] AlphaFold: more thinking and less pipetting (?)

2020-12-09 Thread Harry Powell - CCP4BB
Hi Actually, since Deep Mind is a commercial organization (funded by shareholders and people who buy their services), I don’t think they are subject to the same rules as academia as regards making their source code public. It would be very nice if they would (could?) make their code public,

Re: [ccp4bb] AlphaFold: more thinking and less pipetting (?)

2020-12-09 Thread Harry Powell - CCP4BB
the field, and haven’t really paid CASP much attention in the past I wouldn’t want to comment about past methods. I’ve got a lot to learn. Harry > On 9 Dec 2020, at 12:35, Bryan Lepore wrote: > > On Dec 9, 2020, at 07:16, Harry Powell wrote: >> >> ...the importa

Re: [ccp4bb] Apple Silicon / XQuartz / X11 / CCP4

2020-11-11 Thread Harry Powell - CCP4BB
Hi To be fair to Apple, the original Rosetta that allowed Power PC executables to run on their Intel chipped computers worked really well. I still have a machine that can run Snow Leopard (OSX 10.6.8), which uses Rosetta to run a very old version of PPC MS Word. The main issue appears to be

Re: [ccp4bb] how to calculate the volume of a small molecule

2020-11-05 Thread Harry Powell - CCP4BB
Hi If it’s just organic, use 18 Å^3 per non-hydrogen - e.g. glucose (C6H12O6) occupies around 12*18 ~= 216Å^3. Atoms like S and P add a little more, but for mental artihmetic and a quick estimate it doesn’t amount to a hill of beans. H > On 5 Nov 2020, at 09:25, vincent Chaptal wrote: > >

Re: [ccp4bb] Converting data set to another format?

2021-05-21 Thread Harry Powell - CCP4BB
it was last updated in 1997…). Harry Powell > On 21 May 2021, at 03:45, Dirk Bussiere > <5f8efc77064a-dmarc-requ...@jiscmail.ac.uk> wrote: > > Dear colleagues, > > I have an old data set collected on a Nonius Kappa CCD (.kcd format). I > would like to convert the

[ccp4bb] Analysis of NMR ensembles

2021-05-26 Thread Harry Powell - CCP4BB
Hi Given that there are plenty of people on this BB who are structural biologists rather than “just” crystallographers, I thought someone here might be able to help. If I have a structure in the PDB (e.g. 2kv5) that is an ensemble of structures that fit the NOEs, is there a tool available

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-26 Thread Harry Powell - CCP4BB
hot areas? > Jürgen > >> On May 26, 2021, at 11:04 AM, Harry Powell - CCP4BB >> <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: >> >> Hi >> >> Given that there are plenty of people on this BB who are structural >> biologists rather than “ju

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-26 Thread Harry Powell - CCP4BB
s of the protein may have been studied through NMR relaxation. > > Smita > > > On Wednesday, May 26, 2021, 10:05:05 AM CDT, Harry Powell - CCP4BB > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: > > > Hi > > Given that there are plenty of

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-27 Thread Harry Powell - CCP4BB
Anyway, thanks to all those who answered my original question - especially Tristan: Chimerax (+ his attached script) Michal, Scott: Theseus (https://theobald.brandeis.edu/theseus/) Bernhard: Molmol (https://pubmed.ncbi.nlm.nih.gov/8744573/ ) Rasmus CYRANGE

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-27 Thread Harry Powell - CCP4BB
; scaled by NMR variability > > in ccp4mg? > > This changes the size of the worm but not the colour. > > On Thu, 27 May 2021 at 09:56, Harry Powell - CCP4BB > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: >> >> Anyway, thanks to all those who answered

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-28 Thread Harry Powell - CCP4BB
> ‐‐‐ Original Message ‐‐‐ > On Thursday, 27 May 2021 08:48, Harry Powell - CCP4BB > wrote: > > Hi Jon > > The RMSD data (also NOEs, chemical shifts, etc) are not in the original > PDB so I would have to calculate them - which takes me to my original > question

Re: [ccp4bb] Lowering R factor from small molecule structure

2021-06-04 Thread Harry Powell - CCP4BB
Hi Yes, ANIS and adding hydrogens (in SHELXL) are good things to do - with 0.8Å data most small molecule crystallographers would do this as a first step after fitting all the non-H atoms. One thing I can’t agree with is to cut the resolution of your data _unless_ you have a very, very good

Re: [ccp4bb] Lowering R factor from small molecule structure

2021-06-04 Thread Harry Powell - CCP4BB
gnificant main-molecule disorder so that comes ahead of adding hydrogens, > and refining unrestrained anisoB (as is the default) for disordered atoms is > asking for trouble. It's not as cookie-cutter as you represent, and I stick > to all my suggestions. > > Phil Jeffrey > Princeton &g

Re: [ccp4bb] Analysis of NMR ensembles

2021-05-27 Thread Harry Powell - CCP4BB
gt;>> >>>> The superpose/overlay of all the structures in PyMol should inform you the >>>> rigid part of the protein as well as the flexible part. The rigid part >>>> would have very low backbone RMSD or overlay tightly and the flexible part >>>

Re: [ccp4bb] Ice ring data issue

2021-03-04 Thread Harry Powell - CCP4BB
Hi Alex Have a look at Auspex - it may be able to help AUSPEX (www.auspex.de) Harry > On 4 Mar 2021, at 15:39, Alexander Brown > wrote: > > Hi all, > I'm struggling with a dataset I have which shows very poor data quality > around 3.6A, or exactly where I can see a significant ice ring in

Re: [ccp4bb] ccp4i2 crashes on MacOSX 10.13.6 - High Sierra

2021-04-21 Thread Harry Powell - CCP4BB
and its link /usr/local/lib/libssl.dylib) looks like it’s solved my problem. Talk about needles in haystacks… Harry > On 21 Apr 2021, at 10:42, Harry Powell - CCP4BB > wrote: > > Hi folks > > I have an old-ish Mac (Mac Pro, mid-2010, 3.46 6-core Intel Xeon, 32GB RAM) >

[ccp4bb] ccp4i2 crashes on MacOSX 10.13.6 - High Sierra

2021-04-21 Thread Harry Powell - CCP4BB
Hi folks I have an old-ish Mac (Mac Pro, mid-2010, 3.46 6-core Intel Xeon, 32GB RAM) running High Sierra (OSX 10.13.6) - the box will not support newer versions of OSX or MacOS, so I can’t “upgrade” any further on the OS front (well, I could if I really wanted to hack beyond Apple’s

Re: [ccp4bb] biomolecular NMR for IDPs

2021-08-15 Thread Harry Powell - CCP4BB
Hi Just my two ha’porth. I’m currently involved in a project where my collaborators are investigating the interactions between protein pairs (both hetero and homo) - they specifically asked me _not_ to give them any models from ensembles (actually, they said “no NMR structures because they

Re: [ccp4bb] biomolecular NMR for IDPs

2021-08-17 Thread Harry Powell - CCP4BB
Hi Forgive me if I’ve missed something, but I can’t find a way to run AlphaFold without installing it locally - in which case I need a reasonable GPU. On the other hand, RoseTTAFold does pretty much the same thing and is available via David Baker’s web server - upload your sequence and sit

Re: [ccp4bb] AI papers in experimental macromolecular structure determination

2021-08-04 Thread Harry Powell - CCP4BB
Hi folks This is probably a good time to mention that both Melanie and Andrea will be giving presentations at the IUCr in Prague in a couple of weeks or so in the Commission for Crystallographic Computing session chaired by Rita Giordano - MS-73 Machine learning in biological and

Re: [ccp4bb] [ccp4bb] A "funny" thing related to AlphaFold2 ....

2021-11-10 Thread Harry Powell - CCP4BB
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

Re: [ccp4bb] [ccp4bb] A "funny" thing related to AlphaFold2 ....

2021-11-10 Thread Harry Powell - CCP4BB
e with MG. > > On Wed, 10 Nov 2021 at 12:16, Harry Powell - CCP4BB > <193323b1e616-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; a

[ccp4bb] interesting paper...

2021-07-16 Thread Harry Powell - CCP4BB
Readers of this BB may be interested in the following paper from DeepMind - https://www.nature.com/articles/s41586-021-03819-2_reference.pdf referenced from https://www.nature.com/articles/s41586-021-03819-2 Of course, you should never just open a link contained in an e-mail…

Re: [ccp4bb] ligand binds to one molecule

2022-03-07 Thread Harry Powell - CCP4BB
Hi folks Just my two ha’porth; if you go back to one of the first two structures determined by protein crystallography, haemoglobin (horse?) has multiple oxygen binding sites) which are potentially different (the binding of oxygen ion one affects the binding in the other - “allostery”). I’m

Re: [ccp4bb] CCTBX current reference?

2022-02-21 Thread Harry Powell - CCP4BB
Hi Is this _really_ the most recent reference for cctbx? Grosse-Kunstleve, R. W., Sauter, N. K., Moriarty, N. W. & Adams, P. D. (2002). J. Appl. Cryst. 35, 126–136. (from one of Dorothee Liebschner’s recent papers)? Harry > On 21 Feb 2022, at 09:44, Harry Powell -

[ccp4bb] CCTBX current reference?

2022-02-21 Thread Harry Powell - CCP4BB
Hi I didn’t find this in a couple of minutes searching so I thought I’d ask - what’s the current literature reference for the cctbx toolkit? Harry To unsubscribe from the CCP4BB list, click the following link:

Re: [ccp4bb] CCTBX current reference?

2022-02-22 Thread Harry Powell - CCP4BB
Jul 2013) Harry > On 21 Feb 2022, at 10:04, Harry Powell - CCP4BB > <193323b1e616-dmarc-requ...@jiscmail.ac.uk> wrote: > > Hi > > Is this _really_ the most recent reference for cctbx? > > Grosse-Kunstleve, R. W., Sauter, N. K., Moriarty, N. W. & Adams, P

Re: [ccp4bb] Coot 1

2022-04-04 Thread Harry Powell - CCP4BB
Isn’t that what we all say every year on the day after March finishes? Harry > On 1 Apr 2022, at 23:46, Paul Emsley wrote: > > That, for the record, is more or less what Ralf said 18 years ago. > On 01/04/2022 23:38, Pavel Afonine wrote: >> It's April 1st today, isn't it? -;) >> >> >> On

Re: [ccp4bb] OFF_TOPIC: Should you be worried about BPA from plastics? Yes, if you store alkaline reagents in polycarbonate bottles!

2022-01-31 Thread Harry Powell - CCP4BB
Hi Last year there were a few reports in the chemical press (e.g. https://doi.org/10.1039/D1SC02708E, and references therein) of studies of glass catalysing reactions - it seems that it isn’t as benign as one might imagine. Of course, this will not be news to the old chemical hands on this

Re: [ccp4bb] Add secondary structure definition into an alphafold PDB

2022-04-07 Thread Harry Powell - CCP4BB
Hi Ines DSSP? (In ccp4 as “mkdssp” in $CBIN)? Should work with any (valid??) PDB file “Oldie but goodie”... Harry > On 7 Apr 2022, at 09:24, Munoz.Ines wrote: > > Dear all, > > Is there any program or server that automatically assign the secondary > structure elements into a pdb generated

Re: [ccp4bb] Add secondary structure definition into an alphafold PDB

2022-04-07 Thread Harry Powell - CCP4BB
Also, of course, you could get the up-to-date version from - https://swift.cmbi.umcn.nl/gv/dssp/ Harry > On 7 Apr 2022, at 09:29, Harry Powell - CCP4BB > wrote: > > Hi Ines > > DSSP? (In ccp4 as “mkdssp” in $CBIN)? Should work with any (valid??) PDB file >

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