Biophysics

Structure and function of the human mitochondrial MRS2 channel

1. Zhihui He
2. Yung-Chi Tu
3. Chen-Wei Tsai
4. Jonathan Mount
5. Jingying Zhang
6. Ming-Feng Tsai
7. Peng Yuan

• Curated by Biophysics Colab

  Evaluation Statement (14 June 2024)

  The study by He et al. explores the structure and mechanisms of the human mitochondrial RNA splicing 2 (MRS2) protein, predicted to form Mg2+-selective channels in the mitochondrial inner membrane based on homology to the CorA family of prokaryotic Mg2+ channels. The authors use an innovative biochemical strategy to express MRS2 and perform single particle reconstructions in the absence and presence of key divalent cations. High resolution reconstructions of the pentameric channel reveal binding sites for Mg2+ and Ca2+, and electrophysiological investigations suggest that MRS2 is a Ca2+-regulated, cation-selective, Mg2+-permeable channel, in contrast to the Mg2+-regulated, Mg2+-selective CorA channel. This is an important study with interesting structural and functional observations, which will motivate further investigations of a potential role for MRS2 in mitochondrial Ca2+ signaling.

  Biophysics Colab recommends this study to scientists interested in the structure, function and regulation of cation channels as well as those working on mitochondrial transport.

  Biophysics Colab has evaluated this study as one that meets the following criteria:

  - Rigorous methodology

  - Transparent reporting

  - Appropriate interpretation

  (This evaluation refers to the version of record for this work, which is linked to and has been revised from the original preprint following peer review.)

Reviewed by Biophysics Colab

Prospective Evaluation of Structure-Based Simulations Reveal Their Ability to Predict the Impact of Kinase Mutations on Inhibitor Binding

1. Sukrit Singh
2. Vytautas Gapsys
3. Matteo Aldeghi
4. David Schaller
5. Aziz M. Rangwala
6. Jessica B. White
7. Joseph P. Bluck
8. Jenke Scheen
9. William G. Glass
10. Jiaye Guo
11. Sikander Hayat
12. Bert L. de Groot
13. Andrea Volkamer
14. Clara D. Christ
15. Markus A. Seeliger
16. John D. Chodera

Reviewed by PREreview

Torsion is a Dynamic Regulator of DNA Replication Stalling and Reactivation

1. Xiaomeng Jia
2. Xiang Gao
3. Shuming Zhang
4. James T. Inman
5. Yifeng Hong
6. Anupam Singh
7. Smita Patel
8. Michelle D. Wang

Reviewed by PREreview

Physiological magnetic field strengths help magnetotactic bacteria navigate in simulated sediments

1. Agnese Codutti
2. Mohammad A Charsooghi
3. Konrad Marx
4. Elisa Cerdá-Doñate
5. Omar Muñoz
6. Paul Zaslansky
7. Vitali Telezki
8. Tom Robinson
9. Damien Faivre
10. Stefan Klumpp

• Curated by eLife

  eLife Assessment

  This study presents valuable experimental and numerical results on the motility of a magnetotactic bacterium living in sedimentary environments, particularly in environments of varying magnetic field strengths. The evidence supporting the claims of the authors is compelling and the study will be of specific relevance to biophysicists interested in bacterial motility.

Reviewed by eLife

Aquavert – Imaging and Microfluidics for Vertical Swimming of Microorganisms

1. Haley B. Obenshain
2. Isaias Zarate
3. Olivia Hedman-Manzano
4. Jared Goderich
5. Sungho Lee
6. Bryant A. Lopez
7. Emma Varela
8. Ga-Young Kelly Suh
9. Douglas A. Pace
10. Siavash Ahrar

Reviewed by Arcadia Science

Prebiotic gas flow environment enables isothermal nucleic acid replication

1. Philipp Schwintek
2. Emre Eren
3. Christof Bernhard Mast
4. Dieter Braun

• Curated by eLife

  eLife Assessment

  This important work shows how a simple geophysical setting of gas flow over a narrow channel of water can create a physical environment that leads to the isothermal replication of nucleic acids. The work presents compelling evidence for an isothermal polymerase chain reaction in careful experiments involving evaporation and convective flows, complimented with fluid dynamics simulations. This work will be of interest to scientists working on the origin of life and more broadly, on nucleic acids and diagnostic applications.

Reviewed by eLife

Surprising features of nuclear receptor interaction networks revealed by live-cell single-molecule imaging

1. Liza Dahal
2. Thomas GW Graham
3. Gina M Dailey
4. Alec Heckert
5. Robert Tjian
6. Xavier Darzacq

• Curated by eLife

  eLife Assessment

  This important study provides data that challenges the standard model that binding of Type 2 Nuclear Receptors to chromatin is limited by the available pool of their common heterodimerization partner Retinoid X Receptor. The evidence supporting the conclusions is compelling, utilizing state-of-the-art single-molecule microscopy. This work will be of broad interest to cell biologists who wish to determine limiting factors in gene regulatory networks.

Reviewed by eLife

Heterogeneity in ligand-bound TRPV1: A comparison of methods in cryo-EM and molecular dynamics simulation

1. Miro A. Astore
2. Robert Blackwell
3. David Silva-Sánchez
4. Pilar Cossio
5. Sonya M. Hanson

Reviewed by PREreview

Wavenumber-dependent transmission of subthreshold waves on electrical synapses network model of Caenorhabditis elegans

1. Iksoo Chang
2. Taegon Chung
3. Sangyeol Kim

• Curated by eLife

  eLife Assessment

  This study presents numerical results on a framework for understanding the dynamics of subthreshold waves in a network of electrical synapses modeled on the connectome data of the C elegans nematode. The strength of the evidence presented in favor of interference effects being a major component in subthreshold wave dynamics is inadequate and the approach is flawed. Substantial methodological issues are present, including altering the original network structure of the connectome without a clear justification and providing little motivation for the choice of numerical parameters values that were used.

Reviewed by eLife

Discovery of a heparan sulfate binding domain in monkeypox virus H3 as an anti-poxviral drug target combining AI and MD simulations

1. Bin Zheng
2. Meimei Duan
3. Yifen Huang
4. Shangchen Wang
5. Jun Qiu
6. Zhuojian Lu
7. Lichao Liu
8. Guojin Tang
9. Lin Cheng
10. Peng Zheng

• Curated by eLife

  eLife Assessment

  This work presents important findings regarding the interaction of the monkeypox virus (MPXV) attachment H3 protein with the cellular receptor heparan sulfate and the use of this information to develop antivirals potentially effective against all orthopoxviruses. Using a combination of state-of-the art computational and wet experiments the authors present convincing evidence to sustain their claims. These results will interest those working on basic orthopoxviruses biology and antiviral development.

Reviewed by eLife