Jaya Krishna Koneru, Korey M. Reid, Paul Robustelli (2025), arXiv preprint (written as a book chapter; the host volume is not named in the text) — ARXIV-2505.01860
Key takeaways
- A practical protocol for sampling IDP conformational ensembles with REST2 (Hamiltonian replica exchange that scales only solute interactions), covering setup, running and convergence checks in GROMACS with PLUMED, with a worked α-synuclein fragment example and public inputs.
Seeded from the abstract and a skim, before the reading in NOTE-076. What follows is what the work says about itself.
All-atom MD is valuable for characterizing the conformational ensembles of intrinsically disordered proteins. Those ensembles are heterogeneous and separated by large free-energy barriers, so explicit-solvent simulations need enhanced sampling to be statistically meaningful. Replica exchange with solute tempering runs coupled parallel replicas with selectively modified potential energies and samples IDP conformational space efficiently. The chapter shows how to set up, run and analyse such simulations.
Standing in the record
Filed from the survey of 2026-09-25 of work the anthology set aside as out of scope (tier C): 480 seconds of active reading over 3 sessions in the papers-feed tracker. It was filed Deferred, unread. NOTE-076 is the close reading of 2026-09-25, and it placed the work: Active — A practical, current protocol worth reading for anyone setting up REST2 on an IDP, especially the starting-structure advice and the demultiplexed-replica convergence checks. It is a tutorial, not a benchmark: it reports no quantitative results and makes no comparison with REST3, REHT or tREMD. It also has a few textual errors, listed below; the repository is the ground truth for the example.
When seeded, before the reading in NOTE-076, the entry gave a priority for a deeper reading: low — A how-to chapter that the skim fully characterizes. High owner time (t=480 s over 3 sessions) suggests hands-on use rather than a reading need.
What the seeding asked a deeper reading to check (NOTE-076 is that reading):
- This is a methods tutorial in computational chemistry. Its link to probabilistic modeling is replica exchange as an MCMC or tempering sampler. The survey’s note that it is not ML is correct, so it is not an anthology
biomolecular-modelingdocument. - It could be useful as a ground-truth-ensemble protocol if the owner looks at ML ensemble generators for IDPs. A deeper reading should check the convergence diagnostics section specifically.
Access when seeded: I read the arXiv abstract page (v1 3 May 2025, physics.chem-ph) and the full PDF (30 pp.): Introduction, REST theory, Materials, the Methods/Analysis workflow (Fig. 1), Conclusion and the Notes. The batch title is truncated (“…with replica exchange”); the full published title ends “…replica exchange solute tempering”. The text calls itself “this chapter” but does not name the book, so venue is unverified beyond arXiv.