# RosettaRemodel gives no increased output when setting higher -num_trajectory

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RosettaRemodel gives no increased output when setting higher -num_trajectory
#1

I am trying to design a helical linker between two strongly interacting subunits that connects their termini using RosettaRemodel.

I am running remodel with the following flags in mpi mode and get the desired output (around 2-4 structures with -num_trajectory 32). However when I increase -num_trajectory to e.g. 1000 I still get only around 2-4 strucures out (named 1.pdb 2.pdb ...). while computation time increases drastically.

Is this low output expected in this case? Why am I not getting more output structures when more computation time / trajectories are used? Any information or ideas on how to increase the output for the larger calculations is welcome!

flags:

-in:file:s input/my_protein.pdb
-remodel:blueprint input/resfile

-run:chain A
-remodel:num_trajectory 32
-use_clusters false
-nstruct 1

-ex1
-ex2
-packing:extrachi_cutoff 5
-use_input_sc
-packing:linmem_ig 10
-no_optH false

-find_neighbors
-hb_srbb 1.0



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Tue, 2020-09-22 11:49
JW_24

The file you care about has _0001.pdb suffix.

-nstruct controls how many times the program is run, giving independent structures. -num_trajectory controls how many trials the MCMC does to find the best, which is spat out.

Tue, 2020-09-22 23:22
matteoferla

I also tried to set -num_trajectory to 1 and higher -nstruct (e.g. 100) however all structures with _0001.pdb suffix just featured perfectly linear stretches protruding from the protein with no folding at all. So should I set -num_trajectory to a number where I start to see some meaningful output and then increase the number of calculations using -nstruct?