Article
Immunology
Babek Alibayov, Anna Scasny, Faidad Khan, Aidan Creel, Perriann Smith, Ana G. Jop Vidal, Fa'alataitaua M. Fitisemanu, Teresita Padilla-Benavides, Jeffrey N. N. Weiser, Jorge E. E. Vidal
Summary: Streptococcus pneumoniae strains cause millions of deaths from pneumonia worldwide each year. Hemolysin and hydrogen peroxide produced by the bacteria play important roles in the oxidation of hemoglobin, and may also affect the symbiotic relationship between S. pneumoniae and other bacteria.
INFECTION AND IMMUNITY
(2022)
Article
Nanoscience & Nanotechnology
Linyi Xu, Jing Li, Weishan Shi, Ning Bao, Chunmei Yu
Summary: The synthesis of MnCO3-Au hybrid microspheres and their application in electrochemical biosensing of hydrogen peroxide based on hemoglobin immobilization are reported. The microspheres exhibit unique properties that benefit direct electron transfer of Hb, with high performance and stability for H2O2 detection. The biosensor shows excellent selectivity, repeatability, and long-term stability, with potential for real sample analysis of H2O2.
Article
Chemistry, Multidisciplinary
Shichao Ding, Zhaoyuan Lyu, Lingzhe Fang, Tao Li, Wenlei Zhu, Suiqiong Li, Xin Li, Jin-Cheng Li, Dan Du, Yuehe Lin
Summary: Developing novel substitutes for heme enzymes, such as Fe-N-C based single-atomic site catalysts (SASCs), can provide high catalytic activity and selectivity in biosensing applications. Synthesizing a SASC (Fe-SASC/NW) by doping single iron atoms into carbon nanowires shows promising heme enzyme-like catalytic performance for hydrogen peroxide detection. The electrochemical sensor based on Fe-SASC/NW exhibits excellent detection capabilities for H2O2 due to the isolated Fe-N-x active sites and their structural similarity with natural metalloproteases.
Article
Biochemistry & Molecular Biology
Hebatalla Mohamed, Amna Ghith, Stephen G. Bell
Summary: The cytochrome P450 superfamily of enzymes can catalyse oxidation reactions and their heme and active site environment can be studied using UV-visible absorbance spectroscopy. The binding of imidazole and pyridine-based ligands to different forms of bacterial cytochrome P450 enzymes was evaluated using this technique. The majority of ligands interacted with the heme as expected, but differences in heme environment were observed across enzyme/ligand combinations.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Jaime E. Martinez Grundman, Laia Julio Plana, Jamie L. Schlessman, Luciana Capece, Dario A. Estrin, Juliette T. J. Lecomte
Summary: THB1 is a monomeric truncated hemoglobin found in the cytoplasm of green alga Chlamydomonas reinhardtii, with a unique internal site configuration potentially related to NO dioxygenase activity. Experimental and computational methods were used to assess lysine affinity for heme iron and the protein's redox reactions.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2021)
Review
Biochemistry & Molecular Biology
Marten H. Vos, Mayla Salman, Ursula Liebl
Summary: Carbon monoxide has recently been recognized as a signaling molecule, and only a few natural CO sensor proteins have been identified. These include heme-based transcription factors, such as the bacterial sensor proteins CooA and RcoM. This review focuses on the use of light to dissociate heme-ligand bonds in investigating early processes in ligand switching and signaling, with emphasis on the CO-trapping properties of the heme cavity.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2022)
Article
Chemistry, Physical
Kiran Devi Tulsiyan, Mallika Rani Prusty, Himansu S. Biswal
Summary: It has been found that using choline amino acid-based ionic liquids (ChAAILs) can help hemoglobin (Hb) achieve an intermediate state instead of its native or fully denatured state. The binding energies between ChAAILs and Hb obtained from molecular docking studies were in line with experimental results, and hydrogen bonds were found to play a significant role in the interaction.
Review
Chemistry, Analytical
Rohini Kumari, Daphika S. Dkhar, Supratim Mahapatra, Divya, Rahul Kumar, Pranjal Chandra
Summary: Reactive oxygen species play an important role in cell signaling but excessive production is associated with various diseases. Traditional detection methods have limitations, while biosensing technology has emerged as a major approach. This review discusses recent biosensors for monitoring reactive oxygen species and highlights the progress of nanotechnology and biomimetic engineering in biosensing.
MICROCHEMICAL JOURNAL
(2022)
Article
Multidisciplinary Sciences
Paul T. Morse, Gonzalo Perez-Mejias, Junmei Wan, Alice A. Turner, Inmaculada Marquez, Hasini A. Kalpage, Asmita Vaishnav, Matthew P. Zurek, Philipp P. Huettemann, Katherine Kim, Tasnim Arroum, Miguel A. de la Rosa, Dipanwita Dutta Chowdhury, Icksoo Lee, Joseph S. Brunzelle, Thomas H. Sanderson, Moh H. Malek, David Meierhofer, Brian F. P. Edwards, Irene Diaz-Moreno, Maik Huettemann
Summary: The acetylation of cytochrome c on K39 in ischemic skeletal muscle increases respiration and prevents apoptosis, providing robust resilience to ischemia and ischemia-reperfusion injury. This mechanism is exclusive to skeletal muscle.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sandeep Kumar, Nivedita Chaudhri, W. Ryan Osterloh, Karl M. Kadish, Muniappan Sankar
Summary: A series of nickel(ii) monobenzochlorins and monobenzoporphyrins were synthesized and characterized for their physicochemical and anion sensing properties. One compound exhibited a unique conformation and reversible response to basic anions, while another selectively detected cyanide ions irreversibly.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Takeo Yamawaki, Misao Mizuno, Haruto Ishikawa, Kazuhiro Takemura, Akio Kitao, Yoshitsugu Shiro, Yasuhisa Mizutani
Summary: FixL is a dimeric heme protein kinase that senses oxygen levels to regulate transcription of nitrogen fixation genes. Our study using time-resolved UV resonance Raman spectra reveals oxygen-specific conformational changes in FixL within a microsecond time scale, suggesting that these structural changes serve as the regulatory switch for kinase activity. Furthermore, our findings show that the conformational changes in the sensor and kinase domains are linked, enabling allosteric control of kinase activity.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Inorganic & Nuclear
Juan Cruz Palermo, Melisa Carllinni Colombo, Jonathan A. A. Semelak, Magali F. Scocozza, Fernando M. M. Boubeta, Daniel H. H. Murgida, Dariio A. Estrin, Sara E. E. Bari
Summary: This study investigated the mechanism of metal centered reduction of metmyoglobin by sulfide species under an argon atmosphere. The formation of MbFe(II) at varying ratios of excess sulfide indicated an autocatalytic reaction mechanism. The reaction rate increased at higher alkaline pHs, suggesting HS- as the relevant reactive species for the reduction. The proposed reaction mechanism involves the formation of sulfanyl radical, disulfanuidyl/disulfanudi-idyl radical anions and disulfide, and the autocatalysis is attributed to the behavior of HSS- as a fast reductant.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Biomaterials
Xiaoli Liu, Michelle M. T. Jansman, Wengang Li, Paul Kempen, Peter W. Thulstrup, Leticia Hosta-Rigau
Summary: Efforts have been made to develop HBOCs, specifically Hb-loaded MOF-based nanoparticles, with a surface modification of antioxidant PDA to address the challenge of Hb oxidation to metHb. The PDA-coated MOF-NPs showed effective scavenging of reactive oxygen species and minimal metHb conversion, demonstrating their potential in maintaining tissue oxygenation.
BIOMATERIALS SCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Felice D. Kelly, Phillip A. Yates, Scott M. Landfear
Summary: Parasites rely on host resources to support their existence, and must sense and acquire nutrients from both the host and vector to survive. The flagellum plays a crucial role in sensing environmental conditions, and there are still many unknowns in the mechanistic details of these sensory pathways, posing a challenge for further experimental exploration.
MOLECULAR MICROBIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Valerie Derrien, Eric Andre, Sophie Bernad
Summary: In vitro study reveals that non-symbiotic hemoglobin in rice can dimerize through dityrosine cross-links in the presence of hydrogen peroxide. Tyrosine 112 plays a crucial role in this dimerization process, while this position is not conserved in the sequence of the five rice non-symbiotic hemoglobins. Additionally, tyrosine 151 also affects the peroxidase activity and the heme conformation of the hemoglobin.
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY
(2023)
Article
Electrochemistry
Maciej Sosna, Nelida Leiva-Eriksson, Leif Bulow, Elena E. Ferapontova
Article
Chemistry, Analytical
Dmitrii Pankratov, Mads Bendixen, Stepan Shipovskov, Ulrich Gosewinkel, Elena E. Ferapontova
ANALYTICAL CHEMISTRY
(2020)
Review
Chemistry, Analytical
Kamila Malecka, Edyta Mikula, Elena E. Ferapontova
Summary: The improvement in outcomes for various types of cancer in recent years is attributed to early tumor detection and widespread use of screening tests, with non-invasive, fast, and accurate diagnostic devices playing a crucial role. Biosensors utilizing aptamers in cancer diagnosis offer advantages such as in-vitro aptamer production, cost-effective chemical synthesis, and thermal stability, while electrochemical biosensing approaches provide sensitive, accurate, and affordable sensing methods. This review evaluates the design strategies and analytical performance of electrochemical aptamer-based biosensors for cancer diagnosis, highlighting their future prospects in cancer diagnostics.
Article
Nanoscience & Nanotechnology
Kamila Malecka, Elena E. Ferapontova
Summary: Thrombin is a central biomarker in cardiovascular diseases and Alzheimer's disease development, but its electroanalysis is complicated by low physiological concentrations and nonspecific binding. A new electrochemical method was developed to detect femtomolar levels of thrombin in serum and CSF using G4-hemin DNAzyme, which is simple, sensitive, and selective, providing a new tool for ultrasensitive electrocatalytic assays.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Naghmehalsadat Mirbagheri, Rui Campos, Elena E. Ferapontova
Summary: This study investigated the effect of different capping ligands and electrode substrates on the electrocatalysis of iridium oxide nanoparticles for water oxidation reaction. The results showed that the hydrophilic properties of the electrode substrate could affect the morphology and catalytic performance of the formed iridium oxide films.
Article
Plant Sciences
Marina Urra, Javier Buezo, Beatriz Royo, Alfonso Cornejo, Pedro Lopez-Gomez, Daniel Cerdan, Raquel Esteban, Victor Martinez-Merino, Yolanda Gogorcena, Paraskevi Tavladoraki, Jose Fernando Moran
Summary: Metabolic changes in the urea cycle and polyamine metabolism play an important protective role in plants, limiting ammonium toxicity. High ammonium levels lead to the accumulation of pathway intermediates and a decrease in copper amine oxidase activity. Early supplementation of putrescine can prevent ammonium toxicity. Moreover, high ammonium concentrations increase the levels of transcripts encoding related proteins.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Pedro Lopez-Gomez, Edward N. Smith, Pedro Bota, Alfonso Cornejo, Marina Urra, Javier Buezo, Jose F. Moran
Summary: In this study, the relationship between auxin and nitric oxide (NO) signaling was investigated using a metabolomic approach. It was found that tryptophan (Trp) content can serve as a marker for both auxin- and NO-mediated signaling. The results suggest the existence of a common signaling mechanism involving Trp in both GSNO and IAOx treatments.
Review
Chemistry, Physical
Elena E. Ferapontova
Summary: This article discusses the application of electrochemical methods in the study of neurodegenerative disorders, with a focus on recent advancements in bioelectroanalysis using aptamer- and antibody-modified electrodes.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Ana Diaz-Fernandez, Elena E. Ferapontova
Summary: This study introduces a simple and fast liquid biopsy method for analyzing the overexpressed HER-2/neu protein in aggressive cancers, which shows high sensitivity and low cost.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Lucia Gomez-Arconada, Ana Diaz-Fernandez, Elena E. Ferapontova
Summary: Serine protease thrombin is a strong neurotoxin and Alzheimer's disease biomarker. In this study, the O-2-dependent aptamer assay for thrombin was adapted to gold screen-printed electrodes (Au SPE) for point-of-care testing (POCT). The assay showed enhanced electrocatalytic activity in O2 reduction upon thrombin binding to the aptamer, and 0.5 fM thrombin was detected with a logarithmic linear range extending to 100 fM. The disposable aptasensor met basic POCT requirements but special surface pre-treatment and modification protocols were needed for practical applications.
Article
Chemistry, Multidisciplinary
Maciej Sosna, Elena E. Ferapontova
Summary: The oriented coupling of redox enzymes to electrodes by reconstitution onto redox cofactors poses the requirements for a suitable self-assembled monolayer (SAM) design. The kinetics of electron transfer in binary SAMs composed of alkanethiols and hemin-conjugated linker molecules depends on the SAM composition and hemin surface density. The use of SAM-modified electrodes with loosely dispersed redox centers and rigid molecular wires is important for the effective on-surface reconstitution of proteins and enzymes.
Article
Biochemistry & Molecular Biology
Edurne Tellechea, Aaron C. Asensio, Paula Ciaurriz, Javier Buezo, Pedro Lopez-Gomez, Marina Urra, Jose F. Moran
Summary: This study investigates the characteristics of the recombinant cowpea FeSOD immobilized onto gold nanoparticles (AuNPs) and the effects of NP surface chemistry and biofunctionalization methods on enzyme activity. The results highlight the importance of the biomolecule and AuNP interaction for the functionality of the hybrid and demonstrate the potential of these strategies in biomedical applications.
Article
Chemistry, Analytical
Ana Diaz-Fernandez, Alexey Ferapontov, Mikkel Holm Vendelbo, Elena E. Ferapontova
Summary: Researchers have developed a cellulase-linked sandwich bioassay on magnetic beads for detecting the levels of protein HER-2/neu in blood. This method is simple, low-cost, and enables fast and accurate liquid biopsy analysis.
ACS MEASUREMENT SCIENCE AU
(2023)