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Symmetry

Metal Ion in symmetric design

Category: 
Design
Symmetry

I would like to run a design protocol on a protein that has, as its asymmetric unit, 2 proteins with an ion. I have done some purely AA-based symmetric design before with 2 chains controlled by separate virtual jumps and my own python-generated symdef file but I'd rather avoid doing that again :-) 

My hope was that I could put (even if suboptimal) the 2 chains and the ion in a single chain and proceed as usual in symmetric design with one chain.

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Structure refinement for helical assembles using Rosetta

Category: 
Symmetry
Hi all, I'm very new using Rosetta to make structure refinement. I'v read lots of related articles and also read the Tutorial: Rosetta tools for structure determination in cryoEM density. But I still not sure how to start my first Rosetta try.
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How to fold-and-dock in PyRosetta?

Category: 
Structure prediction
Docking
Symmetry
PyRosetta

I'd like to do something similar to regular Rosetta fold-and-dock but in PyRosetta.  I've looked at D060_Folding.py and D100_Docking.py examples and while I (mostly) understand what each is doing, I have no idea how to combine them.

How to get a foldtree with symmetry? (in my case it's just simple C3) 

How to combine folding and docking?  Just alternate calls to folding.apply(test_pose) and dock_prot.apply(test_pose)?  (It can't be that simple...)

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Transmembrane helix fold-and-dock?

Category: 
Structure prediction
Docking
Symmetry
Membrane

I'd like to fold-and-dock a trimeric transmembrane domain.  I mostly have the "Fold And Dock" working following the example in demos/public/symmetry_examples/fold-and-dock/.  However this is treating the transmembrane helixes as though they are in solvent (so for example any hydrophilic groups always rotate outwards).  I'd like to do something which is a combination of "Membrane Abinitio" and "Fold and Dock".  Is this possible, and how do I do it?

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How to specify constraints during fold-and-dock?

Category: 
Structure prediction
Docking
Constraints
Symmetry

I'm folding a protein which is a trimeric long helix bundle.  I started from the main/demos/public/symmetry_examples/fold-and-dock/ and added my info (sequence, fragments etc).  This basically works but a lot of the resulting folds are globular not long - the helixes fold over on themselves.  I'd like to constrain this to extended conformations only.

I looked at constraints in the Rosetta docs, and tried creating input_files/constraints.cst to give a penalty to any structure which has less than 50-70 A distance between residues 1 and 63:

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Symmetry mode in Remodel for N-terminal extension

Category: 
Design
Loop Modeling
Symmetry

Hello, 

I am trying to use Remodel for N-terminal extension of my homotetramer. I am passing in a single subunit (chain A) and symmetry file (4 subunits identified) with my blueprint with the extra residues of interest. I am getting the following error: 

File: src/protocols/loops/loops_main.cc:253
[ ERROR ] UtilityExitException
ERROR: Can't build a fold tree from a loop with an unspecified cut point.

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RosettaScripts LinkResidues

Category: 
Design
Symmetry

Hey,

I want to redesign the interface of two three-fold symmetrical proteins and I thought of using RosettaScripts.
I first wanted to make it work on one three-fold symmetrical protein and then continue with the interaction, but I am stumbling on some errors.

I'm using LinkResidues, because the protein is three-fold symmetrical, so a mutation on residue a should also occur on residue b and c, thus without breaking the symmetry of those residues.

I'm using:

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how to generate the whole molecule that contains all the symmetric chains

Category: 
Symmetry

Dear all,

I have a pdb file which contains three chains (A, B, and C) for a protein molecule. According to my knowledge, the protein should be 3-fold symetric and a trimer of the three chains. Is there a way to generate the pdb file which contains all the 9 chains for the whole molecules?  I can only find some infomation from the original pdb file about the symmetry like these:

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optimisation of a protein-protein interface

Category: 
Design
Scoring
Symmetry

Dear Rosetta users,

I have a symmetrical homo-dimeric structure for which I would like to select a single point mutation that will increase the affinity between the monomers. I thought about design&relax protocol, in which one position is designed while the remaining ones are only allowed to repack. Such a protocol would be used to scan all the interface positions.

My questions is how to set up this in Rosetta Scripts? Perhaps there are easier/better ways to do this?

Thanks for help! Staszek

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