Biochemistry

eLife Assessment

This useful study presents findings on how some antibiotics, which inhibit protein synthesis in bacteria, affect the translation in mitochondrial ribosomes. The authors provide solid evidence that most tested antibiotics act similarly on bacterial and mitochondrial translation. Additionally, this work shows that alternative translation initiation events might exist in two specific mt-mRNAs (MT-ND1 and MT-ND5). The conclusions of this manuscript are of broad interest to the antibiotic and the mitochondrial fields.

eLife Assessment

This manuscript provides fundamental studies to help us better understand the effects of mutations in the presenilin-1 (PSEN1) gene on proteolytic processing of the amyloid precursor protein (APP). The authors provide compelling evidence using mutations in PSEN to understand what drives alternative substrate turnover with conclusive data and rigorous analysis. This deep mechanistic study provides a framework towards the development of small molecule inhibitors to treat Alzheimer's disease.

eLife Assessment

This is a convincing paper that addresses topics important in our understanding of how inflammatory markers are modulated in both obesity and type 2 diabetes and their effects on Wnt signaling mediators in human bone. There are changes in bone at the tissue level in these 2 common metabolic disorders that ultimately lead to compromised bone strength. These data will be critical to our understanding of the pathophysiology of skeletal fragility in obesity and diabetes.

eLife Assessment

This important study addresses how 3' splice site choice is modulated by the conserved spliceosome-associated protein Fyv6. The authors provide compelling evidence that Fyv6 functions to enable selection of 3' splice sites distal to a branch point and in doing so antagonizes more proximal, suboptimal 3' splice sites.

eLife Assessment

This manuscript provides important structural insights into the recognition and degradation of the host tRNA methyltransferase TRMT1 by SARS-CoV-2 protease nsp5 (Mpro). The data provide compelling support for the main conclusions of the authors. These results will be of interest to researchers studying structures, substrate recognition and specificity of viral proteases and their action on cellular targets.

eLife Assessment

This valuable study clarifies the mechanism by which the kinesin-10 motor protein, chromosome-associated kinesin, Kid (KIF22), enables chromosome movement during mitosis, demonstrating that human and Xenopus Kid proteins function as processive, homodimeric kinesins capable of processive microtubule plus-end motility. The convincing work highlights that Kid can recruit and transport duplex DNA along microtubules via its conserved C-terminal DNA binding domain, revising our understanding of chromokinesins' role in chromosome motility during mitosis. Although the data are robust, the manuscript would benefit from some editing for clarity.

eLife Assessment

The study describes a valuable new technology in the field of targeted protein degradation that allows identification of E3-ubiquitin ligases that target a protein of interest. The presented data are convincing, however, additional work will be needed to optimize for high-throughput evaluation. This technology will therefore serve the community in the initial stages of developing targeted protein degraders.

eLife Assessment

This important study presents interesting results aimed at explaining the effects of a human mutation on the mitochondrial import protein TIMM50 on mitochondrial function and neuronal excitability. While the evidence supporting the conclusions is convincing, the mechanisms driving changes in the levels of certain proteins within and outside the mitochondria (such as certain ion channels) remain unexplained. This paper will be of interest to scientists in the mitochondria field.

eLife Assessment

The manuscript reports on an important comparison of a range of approved clinical inhibitors for BTK used for the treatment of chronic lymphocytic leukemia (CLL). The authors provide compelling evidence for their claims, using a combination of HDX-MS and NMR spectroscopy. The novelty is that this study also seeks to evaluate resistance mutation bias. The manuscript will be of high interest to scientists working on protein drug interactions.

eLife Assessment

Ferredoxins are ubiquitous electron transfer proteins that drive essential metabolic processes across all domains of life. This fundamental contribution to the field provides the first description of how specific amino acids, though a series of hydrogen bonds, control the ability of iron-sulfur clusters in ferrodoxins to accept and donate electrons. The evidence supporting the conclusions is compelling as is the combined use of neutron crystallography with X-ray crystallography and classical spectral/redox studies.