NifS and NifU (encoded by and ) are generally dedicated to biogenesis of the nitrogenase Fe-S cluster in diazotrophs. However, and are not found in N-fixing strains, and the mechanisms involved in Fe-S cluster biosynthesis of nitrogenase is not clear. Here, we found that the genome of WLY78 contains the complete operon, a partial operon, a -like gene, two -like genes (-like and ), and two genes. Deletion and complementation studies showed that the , and genes of the operon, and -like and genes were involved in the Fe-S cluster biosynthesis of nitrogenase. Heterologous complementation studies demonstrated that the -like gene of WLY78 is interchangeable with , but WLY78 SufCDB cannot be functionally replaced by NifU. In addition, and are able to complement the WLY78 mutant. Our findings thus indicate that the NifS-like and SufCDB proteins are the specific sulfur donor and the molecular scaffold, respectively, for the Fe-S cluster formation of nitrogenase in WLY78. YutI can be an Fe-S cluster carrier involved in nitrogenase maturation in WLY78.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8038749 | PMC |
| http://dx.doi.org/10.3390/ijms22073771 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Novel Nitrite Reductase from for Efficient Degradation of Nitrite.
Biomolecules
January 2025
Xingzhi College, Zhejiang Normal University, Jinhua 321100, China.
Nitrite reductases play a crucial role in the nitrogen cycle, demonstrating significant potential for applications in the food industry and environmental remediation, particularly for nitrite degradation and detection. In this study, we identified a novel nitrite reductase (NiR) from a newly isolated denitrifying bacterium, YD01. We constructed a heterologous expression system using BL21/pET28a-Nir, which exhibited remarkable nitrite reductase enzyme activity of 29 U/mL in the culture broth, substantially higher than that reported for other strains.
View Article and Find Full Text PDF[2Fe-2S] model compounds.
Chem Commun (Camb)
January 2025
Department of Chemistry, National Central University, Taoyuan 32001, Taiwan.
This feature article reviews the synthesis, structural comparison, and physical properties of [2Fe-2S] model compounds, which serve as vital tools for understanding the structure and function of Fe-S clusters in biological systems. We explore various synthetic methods for constructing [2Fe-2S] cores, offering insights into their biomimetic relevance. A comprehensive analysis and comparison of Mössbauer spectroscopy data between model compounds and natural protein systems are provided, highlighting the structural and electronic parallels.
View Article and Find Full Text PDFAlkylated DNA repair by a novel HhH-GPD family protein from Crenarchaea.
Nucleic Acids Res
January 2025
College of Plant Protection, Agricultural University of Hebei, No. 2596 Lekai South Street, Baoding City, Lianchi District, Hebei Province 071001, China.
HhH-GPD (helix-hairpin-helix-glycine/proline/aspartate) family proteins are involved in DNA damage repair. Currently, mechanism of alkylated DNA repair in Crenarchaea has not been fully clarified. The hyperthermophilic model crenarchaeon Saccharolobus islandicus REY15A possesses a novel HhH-GPD family protein (Sis-HhH-GPD), where its Ser152 corresponds to a conserved catalytic Asp in other HhH-GPD homologs.
View Article and Find Full Text PDFMerestinib inhibits cuproptosis by targeting NRF2 to alleviate acute liver injury.
Free Radic Biol Med
January 2025
Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, 214122, China; Institute of Health and Medicine, Hefei Comprehensive National Science Center, Hefei, 230601, China. Electronic address:
The emergence of cuproptosis, a novel form of regulated cell death, is induced by an excess of copper ions and has been associated with the progression of multiple diseases, including liver injury, cardiovascular disease, and neurodegenerative disorders. However, there are currently no inhibitors available for targeting specific cuproptosis-related pathways in therapy. Here, the compound merestinib (MTB) has been identified as a strong inhibitor of cuproptosis through screening of a kinase inhibitor library.
View Article and Find Full Text PDFInducers of Autophagy and Cell Death: Focus on Copper Metabolism.
Ecotoxicol Environ Saf
January 2025
State Key Laboratory of Swine and Poultry Breeding Industry, Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chendu 611130, PR China. Electronic address:
Copper is an essential trace element in biological systems, playing a key role in various physiological functions, including redox reactions and energy metabolism. However, an imbalance in copper homeostasis can induce oxidative stress, mitochondrial dysfunction, and inhibition of the ubiquitin-proteasome system, ultimately leading to significant cytotoxicity and cell death. According to recent research, copper can bind to lipoylation sites on proteins involved in the tricarboxylic acid cycle, causing aggregation of lipoylated proteins, the loss of Fe-S cluster proteins, proteotoxic stress, and ultimately, cell death.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!