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Issues with angle Constraints during Docking



I am setting up Docking simulations of 2 Monomers of a protein that forms monolayers at interfaces (HFBI, pdb entry 2fz6 ), so I need to constrain the possible Docking configurations to stay within the x-y plane and only beeing allowed to slightly change its orientation, due to a exposed hydrophobic patch.
I tried to use a combination of 2 angular and one Dihedral constraints. The constraint file looks like:


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Help - Protein-Protein interface design


Hello everyone!!

I am trying to work on the protein-protein interface design using rosetta scripts.  I am new to running rosetta scripts. So, I kindly need help on that. 

I ran the configure file given in the first step which threw me an error of Nobsub in path. I tried installing bsub and adding paths to the bash file but still wasn't able to proceed further. 

Kindly help me out if there are any mistakes or details i may have missed in setting up the run.

Thanks in advance

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Modelling humanized camelid like antibody

Structure prediction

Dear Rosetta community,

I went over the antibody structure prediction tutorials and now in the process of modeling structures for my custom sequence which has 27 aa's in the CDRH3. When I ran the following command,

antibody.linuxgccrelease -fasta cfab.fasta

I got the following error 

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Creating fragment files for proteins less than 27 aa in length

Fragment Generation

Good day.
I'd like to make abinitio structure prediction using rosetta of some small proteins (e.g. 2jof, which length is 20 amino acids). 
Such prediction requires fragment files, which can be generated using web Robetta Server or by youself using PSI-BLAST.
However, when i tried to submit a job on Robetta there was an error:
Sequence length must be between 27 and 1000 residues
Similar restriction was described in rosetta manual dedicated fragment-files:

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Question with rosetta AbPredict tutorial

Structure prediction


I am new to rosetta and just started working on some tutorials. I am currently trying to use AbPredict code to generate sample structures by trying to execute tutorial documents at and also at rosetta_bin_linux_2020.50.61505_bundle/main/demos/tutorials/AbPredict. However, I am having following questions. 

1. file at the rosetta_bin_linux_2020.50.61505_bundle has a syntax issue and the one with the link works perfectly.

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antibody.linuxgccrelease- output models don't have the same sequence as the input fasta

Structure prediction


I am using antibody.linuxgccrelease aplication in order to model camiled heavy chain only antibodies.

when using the command:

antibody.linuxgccrelease -exclude_homologs true -vhh_only -fasta my_fasta.fa | tee grafting.log


for example with my_fasta.fa:

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ValueError: can only read V2000 format files


I'm providing the with the enzyme-ligand complex of my molecule but unfortunetly it gives the "ValueError: can only read V2000 format files" error. Previously i gave it the individual ligand file and it processed with no problems. But when i try to process this file it doesn't seem to work. I suspect the problem is about the chemical table file formats and something in my code is from V3000 but i'm a begginer so i don't know what.

I will attach the text files of both the ligand .mol file and the complex .mol file. 

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CoupledMoves not altering backbone coordinates?


HI All,

I'm beginning to play around with CoupledMoves for flexible backbone design and I am unable to get it to alter the protein backbone coniguration.

When I run the tutorial here ( it works. But when I try and apply that (or similar) command to another protein it will deisgn the sequence, but all the output pdbs have no coordinate changes. 

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