Evidence map›Paper›PMID 33078950›Full record

ArticleThe journal of physical chemistry. B2020

Refining All-Atom Protein Force Fields for Polar-Rich, Prion-like, Low-Complexity Intrinsically Disordered Proteins.

Wai Shing Tang, Nicolas L Fawzi, Jeetain Mittal

Abstract read
In one paragraph

Article in The journal of physical chemistry. B, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed.

  1. Article
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  5. All-atom simulations of biomolecular condensates.Current opinion in structural biology · 2025
    Review
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  18. A synergy between site-specific and transient interactions drives the phase separation of a disordered, low-complexity domain.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  19. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Wai Shing TangDepartment of Physics, Brown University, Providence, Rhode Island 02912, United States.ORCID 0000-0001-7759-7771
Nicolas L FawziDepartment of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, Rhode Island 02912, United States.ORCID 0000-0001-5483-0577
Jeetain MittalDepartment of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States.ORCID 0000-0002-9725-6402

Funding

Functional and Pathological Interactions of TDP-43R01NS116176 · NINDS · BROWN UNIVERSITY · PI FAWZI, NICOLAS LUX, MITTAL, JEETAIN · 2020 to 2024
$3.6M
Liquid-Liquid Phase Separation in Heterochromatin OrganizationR01GM136917 · NIGMS · TEXAS ENGINEERING EXPERIMENT STATION · PI MITTAL, JEETAIN · 2020 to 2023
$1.4M
NIGMS NIH HHS R01 GM136917NINDS NIH HHS R01 NS116176
6 · The paper itself

Abstract

Significant efforts in the past decade have given us highly accurate all-atom protein force fields for molecular dynamics (MD) simulations of folded and disordered proteins. These simulations, complemented with experimental data, provide new insights into molecular interactions that underlie the physical properties of proteins, especially for intrinsically disordered proteins (IDPs) for which defining the heterogeneous structural ensemble is hugely challenging by experiments alone. Consequently, the accuracy of these protein force fields is of utmost importance to ensure reliable simulated conformational data. Here, we first assess the accuracy of current state-of-the-art force fields for IDPs (ff99SBws and ff03ws) applied to disordered proteins of low amino acid sequence complexity that can undergo liquid-liquid phase separation. On the basis of a detailed comparison of NMR chemical shifts between simulation and experiment on several IDPs, we find that regions surrounding specific polar residues result in simulated ensembles with exaggerated helicity when compared to experiment. To resolve this discrepancy, we introduce residue-specific modifications to the backbone torsion potential of three residues (Ser, Thr, and Gln) in the ff99SBws force field. The modified force field, ff99SBws-STQ, provides a more accurate representation of helical structure propensity in these LC domains without compromising faithful representation of helicity in a region with distinct sequence composition. Our refinement strategy also suggests a path forward for integrating experimental data in the assessment of residue-specific deficiencies in the current physics-based force fields and improves these force fields further for their broader applicability.

Indexed as

Intrinsically Disordered ProteinsPrionsAmino Acid SequenceMolecular Dynamics SimulationProtein ConformationIntrinsically Disordered ProteinsPrions

Identifiers

PMID33078950
PMCPMC7880584

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.