[chimerax-users] Nonstandard residues

[Eric Pettersen]

Hi Abilash,
	What version of ChimeraX are you running?  If you are running at least version 1.1 then ChimeraX should be able to interpret that 'A' as part of a two-character chain ID rather then the fourth character of the residue name.  If you are using 1.1 or later, use Help→Report A Bug to submit a bug report about this and attach the PDB file that is producing the problem.

--Eric

	Eric Pettersen
	UCSF Computer Graphics Lab


> On May 27, 2022, at 10:52 AM, Abhilash Padvannil via ChimeraX-users <chimerax-users at cgl.ucsf.edu> wrote:
> 
> Hi,
> 
> I am trying to open PDB (multi subunit complex) from phenix refinement in ChimeraX. One of the chains is A7. While the PDB’s open normally in coot, ChimeraX recognizes a couple of chains as nonstandard residues and is showing XXXX for the entire length of the amino acid sequence (ALA as ALAA 7 , MET as META 7) and so on. The residues correspond to subunit with chain ID A4.
> 
> Attached is the sequence view
> 
> Please suggest how to fix this.
> 
> 
> Thanks
> 
> Abhilash.
> 
> 
> <Screen Shot 2022-05-27 at 10.48.38 AM.png>
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