Review
Plant Sciences
Bing Yang, Chenyun Xu, Yuting Cheng, Ting Jia, Xueyun Hu
Summary: Iron-sulfur (Fe-S) clusters are ancient protein cofactors that exist ubiquitously in organisms and play important roles in various life processes. Plastids, semi-autonomous organelles believed to originate from cyanobacterial endosymbionts, have a Fe-S cluster biosynthesis and delivery pathway similar to cyanobacteria. Fe-S clusters are crucial for the normal functioning of downstream Fe-S proteins in plastids. Recent research has made significant progress in understanding this pathway and this review summarizes these findings as well as the remaining scientific challenges.
PLANT CELL REPORTS
(2023)
Review
Plant Sciences
Angeles Aroca, Inmaculada Garcia-Diaz, Margarita Garcia-Calderon, Cecilia Gotor, Antonio J. Marquez, Marco Betti
Summary: Photorespiration plays a fundamental role in plant metabolism and its regulation, including transcriptional and post-translational regulation, has been a topic of interest. The interconnections between photorespiration and nitrogen and sulfur metabolism have also been explored. Recent findings on sulfide signaling and protein persulfidation are discussed.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Review
Biochemistry & Molecular Biology
Anna G. Mankovich, Brian C. Freeman
Summary: Heat shock protein 90 (Hsp90), a highly conserved molecular chaperone, not only maintains the stability of metastable proteins, but also plays a crucial role in protein transport. The specific contributions of Hsp90 to protein transport are still not well defined, despite numerous connections with factors involved in this process.
Review
Biochemistry & Molecular Biology
Liliana S. O. Silva, Pedro M. Matias, Celia Romao, Ligia M. Saraiva
Summary: Repair of Iron Center proteins (RIC) are a family of di-iron proteins found widely in microbes. This review summarizes the data on microbial RICs, including their gene regulation and contribution to pathogenic bacteria survival. The focus is on Escherichia coli RIC, with extensive biochemical characterization and new structural data featuring a di-manganese site. The networking of protein interactions involving RIC and its proposed physiological role as an iron donor for repairing damaged iron-sulfur centers are also described.
Article
Biochemistry & Molecular Biology
Dafne Suraci, Giovanni Saudino, Veronica Nasta, Simone Ciofi-Baffoni, Lucia Banci
Summary: The study reveals the coordinated mechanism of ISCA1, ISCA2, and NFU1 in the maturation process of mitochondrial [4Fe-4S] proteins. ISCA1 plays a key role in promoting the interaction between NFU1 and ISCA2, leading to the formation of a transient ISCA1-ISCA2-NFU1 ternary complex. This mechanism ensures the safe transfer of [4Fe-4S] clusters from the assembly site on the ISCA1-ISCA2 complex to NFU1, making them available for mitochondrial apo proteins that require NFU1.
JOURNAL OF MOLECULAR BIOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Szymon W. Kmiecik, Matthias P. Mayer
Summary: Cells need to maintain proteome homeostasis and regulate it through the heat shock response (HSR), which is orchestrated by heat shock transcription factor 1 (Hsf1). Hsf1 plays a crucial role in regulating proteome homeostasis and is involved in aging, cancer, and neurodegenerative disorders. Multiple layers of control circuits, such as synthesis and degradation, conformational rearrangements, post translational modifications (PTMs), and molecular chaperones in negative feedback loops, regulate the transcriptional activity of Hsf1.
TRENDS IN BIOCHEMICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Leon P. Jenner, Mickael Cherrier, Patricia Amara, Luis M. Rubio, Yvain Nicolet
Summary: The nitrogenase MoFe protein contains two different FeS centers, the P-cluster and the iron-molybdenum cofactor (FeMo-co). NifB is an important enzyme in FeMo-co assembly. Recent crystal structures of NifB proteins show the plasticity of the protein and suggest how ligand reorganization would accommodate cluster loading and fusion in the time-course of NifB-co synthesis.
Article
Biochemistry & Molecular Biology
Ssu-Ju Fu, Meng-Chun Hu, Cheng-Tsung Hsiao, An-Ting Cheng, Tsung-Yu Chen, Chung-Jiuan Jeng, Chih-Yung Tang
Summary: The ClC-2 channel is crucial for ion homeostasis in the brain and testis, with mutations in the CLCN2 gene linked to leukodystrophy. Clcn2-deficient mice exhibit myelin vacuolation and testicular degeneration. The Hsp90 beta-Hsc70 chaperone system plays a key role in promoting ClC-2 protein biogenesis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Plant Sciences
Nabila Riaz, Mary Lou Guerinot
Summary: Iron is an essential micronutrient for plants and animals, with deficiency leading to anemia in humans. Plants heavily rely on plant-based foods as their primary source of iron, but these foods are often poor sources of dietary iron. Understanding how plants adapt to iron deficiency is crucial for optimizing iron uptake and ensuring optimal plant growth.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Biochemistry & Molecular Biology
Felipe A. Carvalho, Ulrich Muehlenhoff, Joseph J. Braymer, Vasilij Root, Martin Stuempfig, Carla C. Oliveira, Roland Lill
Summary: Systematic studies have shown that the Hsp90 chaperone system and Fe/S protein biogenesis or iron regulation are interconnected. DJA5 and DJA6 are two chloroplast-localized proteins that act as iron donors in plastidial Fe/S protein biogenesis. In this study, the impact of Hsp90 chaperone, yeast DJA5-DJA6 homologs, cytosolic Ydj1, and mitochondrial Mdj1 on cellular iron-related processes was investigated using Saccharomyces cerevisiae. Depletion of these crucial proteins resulted in severe phenotypes, but did not have a critical in vivo impact on Fe/S protein biogenesis or iron regulation. Unlike plant DJA5-DJA6 iron chaperones, Ydj1 and Mdj1 did not bind iron in vivo, suggesting that zinc is used for their function under normal physiological conditions.
Review
Plant Sciences
Julien Spielmann, Steven Fanara, Valerie Cotelle, Gregory Vert
Summary: Iron is an essential micronutrient for plant growth, and this review explains how plants perceive and regulate intracellular iron levels. The authors provide detailed information on the regulation of iron transporters and intracellular trafficking, as well as the functional role of these processes in avoiding iron deficiency and toxic metal accumulation.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Sakiko Sato, Yumeka Matsushima, Miaki Kanazawa, Naoyuki Tanaka, Takashi Fujishiro, Kouhei Kunichika, Ryosuke Nakamura, Hiroaki Tomioka, Kei Wada, Yasuhiro Takahashi
Summary: IscU plays a central role in Fe-S cluster assembly and transfer, with potential for bypassing the essential roles of HscA and HscB through conformational interconversion. The study reveals dynamic conformational changes in IscU, highlighting the fundamental requirement for Fe-S cluster assembly and transfer.
MOLECULAR MICROBIOLOGY
(2021)
Review
Cell Biology
Nicholas J. J. Geraghty, Sandeep Satapathy, Mark R. R. Wilson
Summary: The immune system is crucial for organism protection. Complement and ECs play important roles in maintaining protein homeostasis and controlling immune processes. They may interact with pathogens and immune responses, and influence the development of various diseases.
Article
Chemistry, Multidisciplinary
Jordan C. C. Koone, Mikaela Simmang, Devin L. L. Saenger, Laura M. M. Hunsicker-Wang, Bryan F. F. Shaw
Summary: The extent to which redox-driven proton pumps regulate net charge during electron transfer remains uncertain due to measurement difficulties. In this study, a protein charge ladder was synthesized and electrostatic measurements were made, revealing changes in net charge at different pH values. The results suggest a transition from electron transfer to proton-coupled electron transfer, and then to two proton-coupled electron transfer. The measurements also provide insight into the protonation of specific residues and support a discrete proton pumping mechanism for Rieske proteins.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Giovanni Saudino, Simone Ciofi-Baffoni, Lucia Banci
Summary: In this study, it was discovered that NFU1 and ISCA1 in the mitochondrial iron-sulfur cluster assembly machinery play a crucial role in the insertion of a [4Fe-4S] cluster into LIAS by forming a heterodimeric complex. The C-domain of NFU1 drives the cluster to its final destination by exploiting a protein interaction affinity gradient.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)