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calcium metal nomenclature: Rosetta_cm confusing HETATM CA (calcium) with ATOM CA (alpha-carbon)

Category: 
Structure prediction
Constraints
Symmetry
Membrane

Dear community,

I had this posted under a different sub-forum but I realized it didn't fit that forum so deleted it and reposting here.

Post Situation: 

clashes created with enzdes

Category: 
Enzyme Design

 

Hello, 

I'm working on de novo enzyme design. Utilizing the enzdes application through theozyme definition. While doing regular design procedures I have noticed that Rosetta inserts amino acid identities that create clashes with the ligand. Most notable is an Ile with a distance of 3A to the ligand, instead of the minimum 4. Images attached. As far as I know, I have not altered the default behavior of vdw radii at any point.  The energies for these residues do not sky-rocket and Rosetta scores these designs very favorably.  

Post Situation: 

Problem with match on enzdes

Category: 
Enzyme Design

Hi all! I am attempting my very first enzyme design campaign and running into issues with matching. I generated a cstfile from averaging native pdb measurements within a family, and am trying to match my theozyme (a new substrate - LFF) to one representative structure as a test (PDB ID: 5nci chain A).

When I run:

Post Situation: 

Extracting a part of a silent file as another silent file

Category: 
Docking

Dear all,

I generated a silent file as a result of a docking refinement with FlexPepDock. I want to anaylize the top 10% of the solutions (1000 decoys) and cluster them.

First, I extracted the top 10% by sorting the I_sc with:

sort -n -k2 example_score_file.sc | head -n 1000 | awk '{print $2 "\t" $25 "\t" $NF}' > score_I-sc_tag.dat

Post Situation: 

FlexPepDock bug? Constraints do not appear in total_score?

Category: 
Constraints

Hi, looking for some help,

It appears that constraints do not contribute to the final score output when running the FlexPepDock ab initio protocol.

I am getting docking samples that should yield score penalties >1000 under the provided distance constraints (AtomPair FLAT_HARMONIC). However, the scorefile reports numbers consistent with the score absent of penalties (approx -550, for a protein length 300 and peptide length 5).

I provide the constraints file with the flag -constraints:cst_file

Post Situation: 

FlexPepDock ab initio: behavior without fragment files

Category: 
Docking

Hi there,

I've noticed that the FlexPepDock ab initio protocol will run even if fragments aren't specified. It also appears during these runs that the peptide backbone is flexible, varying between samples.

When no fragments are specified, what does the FlexPepDock application do to ab initio model peptides exactly?

Is there a 'default' set of fragments?

Thank you!

Nathan

Post Situation: 

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