Hi Roden, I guess you could use Build Structure to generate a peptide of arbitrary sequence, then use the Selection Inspector (in the toolbar) to change the phi/psi angles of selected segments to the values appropriate for the type of secondary-structure element you want there. Helices are easy, but you can only generate strands this way, not sheets. To get the strands to form sheets you would have to do some pretty difficult manipulation of the torsion angles of the intervening coil regions. --Eric Eric Pettersen UCSF Computer Graphics Lab
On Jan 21, 2025, at 1:19 AM, Roden Deng Luo via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
Hi,
I know there is a tool and command "build". But it is not that interactive. I wonder if there is a feature in ChimeraX (or any other tools) that can allow the user to draw in 3D space (or 2D) lines and then specify some segments as alpha-helices and some other segments as beta-sheets. I imagine the generated structure can be a backbone populated with G (glycine).
Thanks, Roden
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