SOURSOP

ABOUT

SOURSOP is a Python-based simulation analysis package for working with intrinsically disordered and unfolded proteins. It is built on top of mdtraj, and was developed by Jared Lalmansingh and Alex Holehouse.

The current stable release candidate on PyPI is 0.2.6 (November 2024).

DOCUMENTATION

All documentation, including installation information can be found here.

ERRORS, FEATURES, REQUESTS

If you find a bug, typo, or error please raise an issue or GitHub.

If you wish to add a new feature, please see our Development information in the docs (especially for adding plugins).

MISCELLANEOUS

• As of right now, the continuous integration fails because of a specific mismatch in how an edge-case error is handled between different versions of mdtraj. All other tests are passing and SOURSOP is ready for production. Do not be alarmed by the failing status above!

PUBLICATION

To read about SOURSOP please see our paper:

Lalmansingh, J. M., Keeley, A. T., Ruff, K. M., Pappu, R. V. & Holehouse, A. S. SOURSOP: A Python Package for the Analysis of Simulations of Intrinsically Disordered Proteins. J. Chem. Theory Comput. (2023). doi:10.1021/acs.jctc.3c00190

• Journal link
• Paper PDF

Copyright

Copyright (c) 2015-2024 under the GNU LESSER GENERAL PUBLIC LICENSE

Changelog

Update November 2024 (0.2.6)

• Major update to SOURSOP.
• Explicit support for single-chain one-bead-per-residue trajectory loading that dramatically improves load time (~30x improvement)
• Officially added the SSSampling class and support for PENGUIN (see Lotthammer & Holehouse, bioRxiv
• Added support for NH3 and FOR residue types in get_amino_acid_sequence()
• Switched over packaging to use pyproject.toml instead of setup.py and switched versioning to use v

Update March 2024 (0.2.5 [patch])

• Added return_instantaneous_maps=False keyword to get_distance_maps() function so we can return a [t,n,n] matrix where t = number of frames and n=number of residues for the instantaneous conformer-specific distance maps.

Update Feb 2024 (0.2.5)

• Removed periodic correction in SSProtein functions. We could provide periodic boundary condition checks for some but not all functions, and ensuring this flag was possible everywhere is not feasable. With this in mind, we opted to make a design decision to remove the periodic flag from the small number of functions that had it, such that there's no risk of a user forgetting and analyzing two distinct properties for a trajectory that requires PBC fixing where one analysis used periodic=True whereas another did not have this option. Now, the user must ensure their protein trajectories are corrected ahead of time. Note that we also added support for periodic=True for some of the SSTrajectory analysis functions, because in cases where multiple chains are present reconstructing a non-PBC trajectory becomes much more difficult. As such, intermolecular analysis does provide intrinsic PBC correction, whereas intramolecular analysis does not.

Update July 2023

• Added in explicit_residue_checking flag into SSTrajectory constructor, which makes it possible to use a solvated .gro file as an input file.

Update February 2023

• Added plugins example
• Added additional tests and finalized documentation

Update July 2022

For version 0.2.1 we introduce potentially breaking changes into how COM distances are reported.

Details:

All center-of-mass (COM)-based functions now return distances (as before) and relative positions in x/y/z (this is new) in Angstroms, not nanometers. Previously, the various center-of-mass based functions that returned absolute positions (i.e. 3xn matrices of x/y/z vs frame number) returned them where x/y/z was in units nm. This is fine if you know this, but means if you manually calculate distance between two COM vectors you'd get a distance in nanometers and not Angstroms. This is an unhelpful and unexpected behavior given all other distances are in Angstroms, so we have made the decision to fully update to Angstroms even for vector positions. This DOES NOT break any code internal to soursop, but if you were using COM positions to manually calculate distances these may need to be recalculated.

Update April 2022

For version 0.1.9 the documentation has been extensively extended

Update July 2021

CAMPARITraj is SOURSOP! For the final release we have re-named and re-branded CAMPARITraj as SOURSOP. This change in the name serves two important purposes.

Firstly, CAMPARITraj was borne out of a collection of scripts and code built to work with CAMPARI. However, it has evolved into a stand-alone package for the analysis of all-atom simulations of IDPs and IDRs, and importantly, much of the analysis it performs can also be done in CAMPARI. As such, we felt it was important to decoupled SOURSOP from CAMPARI, both to avoid the implication that CAMPARI cannot perform analyses itself, and to avoid a scenario in which it may appear that this package only works with CAMPARI simulations.

Secondly, there is a long, rich tradition of naming software tools after drinks in the Pappu lab (CAMPARI, ABSINTH, CIDER, LASSI etc.). As such SOURSOP is first-author Jared's Caribbean twist on this theme!

WARNING

We are currently and systematically updating all of the CAMPARITraj codebase to SOURSOP. As such, for now, we recommend using a previous version. Note the SOURSOP change breaks all backwards compatibility. Sorry about that.

Update December 2020

Release 0.1.2 includes updated support to ensure CAMPARITraj will continue to work with MDTraj 1.9.5, as well as numerous additional updated.

Update May 2019

This is the development repository of CAMPARITraj and SHOULD NOT be used for production. Seriously, it is being modified constantly and with no building requirements during code pushes. If you want a building copy PLEASE contact Alex directly! [last touched June 24th 2019].

Acknowledgements

Project based on the Computational Molecular Science Python Cookiecutter version 1.0.