Re: [modeller_usage] Number of equivalent positions <3

[Modeller Caretaker <modeller-care@ucsf.edu>]

On 1/27/22 3:56 AM, Hocine EL KHAOUDI ENYOURY wrote:
> I am getting this error, when I am running modeller (sailing.py):
>
> _modeller.ModellerError: fit2xyz_296E> Number of equivalent positions < 3: 0
>
>   I am trying to make a multi-template model to reconstruct a loop 
> region for a protein. I am using a experimental structure of the loop 
> (it has only 7 aminoacids), and several whole structures from the PDB 
> and derived from modeller. There is any way to force the alignement or 
> to solve this problem?

You can't make a structural alignment unless there's at least some 
structural overlap between the sequences. Sometimes it can help to do a 
sequence alignment first to get an "initial guess" for the subsequent 
structural alignment.

	Ben Webb, Modeller Caretaker
--
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