Good day Tata Santosh Rama Bhadra Rao,
There is no tutorial for measuring pore diameter, sorry. ChimeraX does not have a tool specifically to show a tunnel and report the pore radius -- if you wanted something like that maybe you would need to use other software like HOLE, MOLE, Caver, etc., maybe MolAxis. For example, here are MOLEonline and MolAxis servers: https://mole.upol.cz/ https://bioinfo3d.cs.tau.ac.il/MolAxis/
However, if you are willing to choose two points yourself in ChimeraX, you can measure the distance between them. Some possible approaches:
(1) You can measure the distance between any two atoms, e.g. show atoms, Ctrl-click to select first atom, Shift-Ctrl-doubleclick second atom, choose "Distance" from resulting context menu
(2) You can use the "tape measure" mouse mode to click and drag a measurement. This can be between atoms, ribbons, and/or surface points. First you have to assign a button to this function and then use it, e.g. command
mouse right "tape measure"
https://rbvi.ucsf.edu/chimerax/docs/user/commands/ui.html#mousemode https://rbvi.ucsf.edu/chimerax/docs/user/tools/mousemodes.html#tapemeasure
...and then right click-drag to do the measurements.
However, it can be very difficult to get to the positions you want to measure, especially if you are showing a tunnel surface. You may need to use clipping such as with the Side View (menu: Tools... General... Side View) and even then it may not work the way you would like. In that case you would need to use other software as mentioned above.
I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco
On Jul 26, 2022, at 8:18 PM, SANTOSH RAMA BHADRA RAO TATA via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Good day Meng,
I'm trying to find the tutorial for the measuring the pore diameter. Can you please help me which protocol goes well with it.
Thanking you,
With best wishes, Tata Santosh Rama Bhadra Rao, PhD Scholar, C/O Prof Helen Irving, La Trobe university, Bendigo, Vic-3550, Australia. Email: 19807877@students.latrobe.edu.au; S.Tata@latrobe.edu.au Phone: 0499263974