On Dec 15, 2020, at 8:16 AM, Elaine Meng <meng@cgl.ucsf.EDU> wrote:

Hi Yasser,
Chimera does not have a command to do this.  In Chimera you could do it with menu Tools... Structure Editing... Build Structure, the "Start Structure" atom option.  I don't know python, so I can't give details on that.
<https://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/editing/editing.html#start">

Other possibilities in Chimera are to manually create (with a text editor) a PDB file or marker file and then open it.

If you use ChimeraX instead, there is a "build start atom" command to do it.
<https://rbvi.ucsf.edu/chimerax/docs/user/commands/build.html#start>

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Dec 15, 2020, at 2:02 AM, Yasser Almeida <yasser.almeida@gmail.com> wrote:

Hello,

How can I create an atom object, with a given xyz coordinates, via command or python?

Thanks in advance,

Yasser

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