[3dem] determine spherically averaged radial density

Dieter Blaas dieter.blaas at meduniwien.ac.at
Tue Apr 9 22:11:14 PDT 2024


Dear all,

     thank you very much for your suggestions! We finally made it with 
Eman2. I have just two last questions: 1) The curves are extremely noisy 
- probably because of the high resolution and sharpening. Is it 
legitimate to remove the very central density data and to filter the 
volumes to lower resolution and/or to smoothen the curves (e.g. Bezier). 
2) Is it correct that the final diameter corresponds to the value where 
the curve passes zero density?

Thanks, best, Dieter

------------------------------------------------------------------------
Dieter Blaas,
Max Perutz Laboratories
Medical University of Vienna,
Inst. Med. Biochem., Vienna Biocenter (VBC),
Dr. Bohr Gasse 9/3,
A-1030 Vienna, Austria,
Tel: 0043 1 4277 61630,
Mobile: 0043 699 1942 1659
e-mail:dieter.blaas at meduniwien.ac.at
------------------------------------------------------------------------

On 09.04.2024 19:38, David Michael Belnap wrote:
>
> Another option is bradial in the Bsoft package (website, bsoft.ws). 
> Here is an example command:
>
> bradial -verbose 7 -subtractbackground -radial -origin 142,142,142 
> -minmax 0,150 -step 0.5 run_class001.mrc
>
> David
>
> =======================================
> David M. Belnap
> Electron Microscopy Core Laboratory
> Department of Biochemistry
> School of Biological Sciences
> 2501 SMBB
> University of Utah
> Salt Lake City, Utah 84112 USA
> Phone  801.585.1242
> FAX  801.587.3077
> David.Belnap at utah.edu <mailto:David.Belnap at utah.edu>
> =======================================
>
> *From: *3dem <3dem-bounces at ncmir.ucsd.edu> on behalf of Carlos Oscar 
> Sorzano <coss at cnb.csic.es>
> *Date: *Tuesday, April 9, 2024 at 07:39
> *To: *Dieter Blaas <dieter.blaas at meduniwien.ac.at>, "Ludtke, Steven 
> J." <sludtke at bcm.edu>, Tom Calcraft <tom.calcraft at crick.ac.uk>
> *Cc: *"3dem at ncmir.ucsd.edu" <3dem at ncmir.ucsd.edu>
> *Subject: *Re: [3dem] determine spherically averaged radial density
>
> Same here, I am afraid you would need to update the Xmipp if you still 
> want to use it.
>
> Kind regards, Carlos Oscar
>
> El 09/04/2024 a las 14:39, Dieter Blaas escribió:
>
>     Dear Tom and Steven,
>
>        thanks for the quick answer! But I also need to install the
>     entire Eman2 package for it work?
>
>     Best, Dieter
>
>     ------------------------------------------------------------------------
>
>     Dieter Blaas,
>
>     Max Perutz Laboratories
>
>     Medical University of Vienna,
>
>     Inst. Med. Biochem., Vienna Biocenter (VBC),
>
>     Dr. Bohr Gasse 9/3,
>
>     A-1030 Vienna, Austria,
>
>     Tel: 0043 1 4277 61630,
>
>     Mobile: 0043 699 1942 1659
>
>     e-mail:dieter.blaas at meduniwien.ac.at
>
>     ------------------------------------------------------------------------
>
>     On 09.04.2024 13:47, Ludtke, Steven J. wrote:
>
>         To add, if your goal is to compute the radial density
>         distribution as a curve rather than the averaged volume,
>
>         e2proc3d.py  --calcradial 0 map.mrc radial.txt
>
>         (can also calculate min,max)
>
>         e2proc3d.py  --help
>
>         ---
>
>         Steven Ludtke, Ph.D. <sludtke at bcm.edu>
>         <mailto:sludtke at bcm.edu>                      Baylor College
>         of Medicine
>         Charles C. Bell Jr., Professor of
>         Structural Biology        Dept. of Biochemistry
>         Deputy Director, Advanced
>         Technology Cores                  and Molecular Pharmacology
>         Academic Director, CryoEM Core
>         Co-Director CIBR Center
>
>
>
>             On Apr 9, 2024, at 5:34 AM, Tom Calcraft
>             <tom.calcraft at crick.ac.uk>
>             <mailto:tom.calcraft at crick.ac.uk> wrote:
>
>             Hi Dieter,
>
>             The math.rotationalaverage function in EMAN2’s e2proc3d.py
>             should do what you are looking for:
>
>             e2proc3d.py --process=math.rotationalaverage input.mrc
>             output.mrc
>
>             Best,
>             Tom
>
>
>                 On 9 Apr 2024, at 10:33, Dieter Blaas
>                 <dieter.blaas at meduniwien.ac.at> wrote:
>
>
>                 External Sender: Use caution.
>
>
>                 Dear all,
>
>                  we need to determine the spherically averaged radial
>                 density of a
>                 symmetric virus. Long ago, we used for this
>                 xmipp_operate but my old
>                 scipion3 and xmipp installs do not work any more. Is
>                 there any other
>                 piece of software that can easily do this without too
>                 much ado?
>
>                 Thanks for hints, Dieter
>
>                 ------------------------------------------------------------------------
>                 Dieter Blaas,
>                 Max Perutz Laboratories
>                 Medical University of Vienna,
>                 Inst. Med. Biochem., Vienna Biocenter (VBC),
>                 Dr. Bohr Gasse 9/3,
>                 A-1030 Vienna, Austria,
>                 Tel: 0043 1 4277 61630,
>                 Mobile: 0043 699 1942 1659
>                 e-mail: dieter.blaas at meduniwien.ac.at
>                 ------------------------------------------------------------------------
>
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