82,239 results match your criteria dehydrogenase complex

Raleigh Instability-Driven Coaxial Spinning of Knotted Cell-Laden Alginate Fibers as Artificial Lymph Vessels.

ACS Appl Mater Interfaces 2021 May 7. Epub 2021 May 7.

Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark.

Constructing artificial lymph vessels, which play a key role in the immune response, can provide new insights into immunology and disease pathologies. An immune tissue is a highly complex network that consists of lymph vessels, with a "beads-on-a-string" knotted structure. Herein, we present the facile and rapid fabrication of beads-on-a-string knotted cell-laden fibers using coaxial spinning of alginate by exploiting the Plateau-Rayleigh instability. Read More

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Evolution of complex I-like respiratory complexes.

J Biol Chem 2021 May 3:100740. Epub 2021 May 3.

Department of Structural Biology, Van Andel Institute, Grand Rapids, Michigan, USA. Electronic address:

The modern-day respiratory complex I shares a common ancestor with the membrane-bound hydrogenase (MBH) and membrane-bound sulfane sulfur reductase (MBS). MBH and MBS use protons and sulfur as their respective electron sinks, which helped to conserve energy during early life in the Proterozoic era when the Earth's atmosphere was low in oxygen. MBH and MBS likely evolved from an integration of an ancestral, membrane-embedded, multiple resistance and pH (Mrp) antiporter and a soluble redox-active module encompassing a [NiFe] hydrogenase. Read More

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Molecular basis of various forms of maple syrup urine disease in Chilean patients.

Mol Genet Genomic Med 2021 May 6:e1616. Epub 2021 May 6.

Pediatrics Department, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.

Background: Maple syrup urine disease (MSUD) is an autosomal recessive inherited metabolic disorder caused by the deficient activity of the branched-chain α-keto acid dehydrogenase (BCKD) enzymatic complex. BCKD is a mitochondrial complex encoded by four genes: BCKDHA, BCKDHB, DBT, and DLD. MSUD is predominantly caused by mutations in the BCKDHA, BCKDHB, and DBT genes which encode the E1α, E1β, and E2 subunits of the BCKD complex, respectively. Read More

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Ubiquitin-proteasome-system and enzymes of energy metabolism in skeletal muscle of patients with HFpEF and HFrEF.

ESC Heart Fail 2021 May 5. Epub 2021 May 5.

Department of Internal Medicine and Cardiology, Technische Universität Dresden, Heart Center Dresden - University Hospital, Herzzentrum Dresden, Universitätsklinik, Fetscherstraße 76, Dresden, 01307, Germany.

Background: Skeletal muscle (SM) alterations contribute to exercise intolerance in heart failure patients with preserved (HFpEF) or reduced (HFrEF) left ventricular ejection fraction (LVEF). Protein degradation via the ubiquitin-proteasome-system (UPS), nuclear apoptosis, and reduced mitochondrial energy supply is associated with SM weakness in HFrEF. These mechanisms are incompletely studied in HFpEF, and a direct comparison between these groups is missing. Read More

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Two Synthetic 18-Way Outcrossed Populations of Diploid Budding Yeast with Utility for Complex Trait Dissection.

Genetics 2020 Jun;215(2):323-342

Department of Ecology and Evolutionary Biology, School of Biological Sciences, University of California, Irvine, California 92697-2525.

Advanced-generation multiparent populations (MPPs) are a valuable tool for dissecting complex traits, having more power than genome-wide association studies to detect rare variants and higher resolution than F2 linkage mapping. To extend the advantages of MPPs in budding yeast, we describe the creation and characterization of two outbred MPPs derived from 18 genetically diverse founding strains. We carried out de novo assemblies of the genomes of the 18 founder strains, such that virtually all variation segregating between these strains is known, and represented those assemblies as Santa Cruz Genome Browser tracks. Read More

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Insight into the function and evolution of the Wood-Ljungdahl pathway in Actinobacteria.

ISME J 2021 May 5. Epub 2021 May 5.

State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China.

Carbon fixation by chemoautotrophic microbes such as homoacetogens had a major impact on the transition from the inorganic to the organic world. Recent reports have shown the presence of genes for key enzymes associated with the Wood-Ljungdahl pathway (WLP) in the phylum Actinobacteria, which adds to the diversity of potential autotrophs. Here, we compiled 42 actinobacterial metagenome-assembled genomes (MAGs) from new and existing metagenomic datasets and propose three novel classes, Ca. Read More

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DNA methylation in former extremely low birth weight newborns: association with cardiovascular and endocrine function.

Pediatr Res 2021 May 5. Epub 2021 May 5.

University of New Mexico Health Sciences Center, Albuquerque, NM, USA.

Background: There is increased risk of cardiovascular, metabolic, and hypertensive disorders in later life in the preterm population. We studied school-age children who had been born extremely premature who had undergone endocrine, cardiovascular, and anthropometric evaluations.

Methods: School age measurements of salivary cortisol, adrenal androgens, blood pressure, and anthropometric markers were correlated with DNA methylation of 11-betahydroxysteroid dehydrogenase type 2 (11BHSD2), leptin, and the LINE1 repetitive DNA element. Read More

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Protein Quantification Using the "Rapid Western Blot" Approach.

Methods Mol Biol 2021 ;2228:29-39

Medizinisches Proteom-Center (MPC), Medical Faculty, Ruhr-University Bochum, Bochum, Germany.

For the quantification of certain proteins of interest within a complex sample, Western blot analysis is the most widely used method. It enables detection of a target protein based on the use of specific antibodies. However, the whole procedure is often very time-consuming. Read More

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January 2021

Aerobic and anaerobic metabolic scaling in the burrowing freshwater crayfish Parastacus pugnax.

J Comp Physiol B 2021 May 4. Epub 2021 May 4.

Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.

Metabolic scaling is a well-known biological pattern. Theoretical scaling exponents near 0.67 and 0. Read More

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Toward an Understanding of the Structural and Mechanistic Aspects of Protein-Protein Interactions in 2-Oxoacid Dehydrogenase Complexes.

Life (Basel) 2021 Apr 29;11(5). Epub 2021 Apr 29.

Department of Chemistry, Rutgers, The State University of New Jersey, Newark, NJ 07102, USA.

The 2-oxoglutarate dehydrogenase complex (OGDHc) is a key enzyme in the tricarboxylic acid (TCA) cycle and represents one of the major regulators of mitochondrial metabolism through NADH and reactive oxygen species levels. The OGDHc impacts cell metabolic and cell signaling pathways through the coupling of 2-oxoglutarate metabolism to gene transcription related to tumor cell proliferation and aging. is a gene encoding 2-oxoadipate dehydrogenase (E1a), which functions in the L-lysine degradation pathway. Read More

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Detection of anti-mitochondrial 2-oxoacid dehydrogenase complex subunit's antibodies for the diagnosis of primary biliary cholangitis.

Clin Immunol 2021 May 1:108749. Epub 2021 May 1.

Department of Immunology, Hospital Universitari de Bellvitge, Catalonia, Spain.

Anti-mitochondrial antibodies (AMA), directed against the E2 subunits of the 2-oxo acid dehydrogenase complexes, are markers of Primary Biliary Cholangitis (PBC), a chronic autoimmune liver disease. However, the clinical significance of subunits-specific AMA type PDC-E2 -E2 subunit of the pyruvate dehydrogenase complex-, BCOADC-E2 -E2 subunit of the branched-chain 2-oxo acid dehydrogenase complex-, OGDC-E2 -E2 subunit of the 2-oxo-glutarate dehydrogenase complex- and nPDC -native pyruvate dehydrogenase complex (M2-AMA) . Is not well known, and not all AMA specificities are associated with PBC. Read More

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Cannabinoid Receptor 1 associates to different molecular complexes during GABAergic neuron maturation.

J Neurochem 2021 May 3. Epub 2021 May 3.

Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos (SESCAM), Toledo, Spain.

CB cannabinoid receptor is widely expressed in the central nervous system of animals from late prenatal development to adulthood. Appropriate activation and signaling of CB cannabinoid receptors in cortical interneurons are crucial during perinatal/postnatal ages and adolescence, when long-lasting changes in brain activity may elicit subsequent appearance of disorders in the adult brain. Here we used an optimized immunoprecipitation protocol based on specific antibodies followed by shot-gun proteomics to find CB interacting partners in postnatal rat GABAergic cortical neurons in vitro at two different stages of maturation. Read More

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Linear Free Energy Relationships for Enzymatic Reactions: Fresh Insight from a Venerable Probe.

Acc Chem Res 2021 May 3. Epub 2021 May 3.

Department of Chemistry, University at Buffalo, SUNY, Buffalo, New York 14260-3000, United States.

ConspectusLinear free energy relationships (LFERs) for substituent effects on reactions that proceed through similar transition states provide insight into transition state structures. A classical approach to the analysis of LFERs showed that differences in the slopes of Brønsted correlations for addition of substituted alkyl alcohols to ring-substituted 1-phenylethyl carbocations and to the β-galactopyranosyl carbocation intermediate of reactions catalyzed by β-galactosidase provide evidence that the enzyme catalyst modifies the curvature of the energy surface at the saddle point for the transition state for nucleophile addition. We have worked to generalize the use of LFERs in the determination of enzyme mechanisms. Read More

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First report of Colletotrichum fioriniae causing anthracnose on mu oil tree in China.

Plant Dis 2021 May 2. Epub 2021 May 2.

Jiangxi Agricultural University, NO. 1101, Fangzhimin Road, Nanchang Economic and Technology Development Area, Nanchang, 330045, P.R. China, Nanchang, China, 330045;

Mu oil tree (Vernicia montana) is an economically important woody oil plant, which is widely distributed in southern China. In mid-May 2020, a leaf spot disease was observed on the leaves of mu oil tree in Taihe County in Jiangxi Province, China (26°55'25.55″N, 114°49'5. Read More

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The Ion-Translocating NrfD-Like Subunit of Energy-Transducing Membrane Complexes.

Front Chem 2021 13;9:663706. Epub 2021 Apr 13.

Instituto de Tecnologia Química e Biológica-António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.

Several energy-transducing microbial enzymes have their peripheral subunits connected to the membrane through an integral membrane protein, that interacts with quinones but does not have redox cofactors, the so-called NrfD-like subunit. The periplasmic nitrite reductase (NrfABCD) was the first complex recognized to have a membrane subunit with these characteristics and consequently provided the family's name: NrfD. Sequence analyses indicate that NrfD homologs are present in many diverse enzymes, such as polysulfide reductase (PsrABC), respiratory alternative complex III (ACIII), dimethyl sulfoxide (DMSO) reductase (DmsABC), tetrathionate reductase (TtrABC), sulfur reductase complex (SreABC), sulfite dehydrogenase (SoeABC), quinone reductase complex (QrcABCD), nine-heme cytochrome complex (NhcABCD), group-2 [NiFe] hydrogenase (Hyd-2), dissimilatory sulfite-reductase complex (DsrMKJOP), arsenate reductase (ArrC) and multiheme cytochrome sulfite reductase (MccACD). Read More

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Diagnostic accuracy of the 1,3-beta-D-glucan test and lactate dehydrogenase for pneumocystis pneumonia in non-HIV patients.

Sci Rep 2021 Apr 29;11(1):9226. Epub 2021 Apr 29.

Emergency Department, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China.

We evaluated the serum levels of (1-3)-beta-D-glucan (BG) and lactate dehydrogenase (LDH) as a tool to support pneumocystis pneumonia (PCP) diagnostic procedures in non-HIV patients. We retrospectively collected non-HIV (human immunodeficiency virus) patients presenting clinical features of PCP between April 1st, 2013, and December 31st, 2018. A total of 225 included patients were tested for Pneumocystis jirovecii by polymerase chain reaction (PCR) and methenamine silver staining. Read More

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The Mitochondrial Genome of the Sea Anemone Reveals Catalytic Introns, Insertion-Like Element, and Unexpected Phylogeny.

Life (Basel) 2021 Apr 28;11(5). Epub 2021 Apr 28.

Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway.

A hallmark of sea anemone mitochondrial genomes (mitogenomes) is the presence of complex catalytic group I introns. Here, we report the complete mitogenome and corresponding transcriptome of the carpet sea anemone (family Stichodactylidae). The mitogenome is vertebrate-like in size, organization, and gene content. Read More

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LncMyoD Promotes Skeletal Myogenesis and Regulates Skeletal Muscle Fiber-Type Composition by Sponging miR-370-3p.

Genes (Basel) 2021 Apr 17;12(4). Epub 2021 Apr 17.

College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.

The development of skeletal muscle is a highly ordered and complex biological process. Increasing evidence has shown that noncoding RNAs, especially long-noncoding RNAs (lncRNAs) and microRNAs, play a vital role in the development of myogenic processes. In this study, we observed that lncMyoD regulates myogenesis and changes myofiber-type composition. Read More

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Structural Investigation and Molecular Modeling Studies of Strobilurin-Based Fungicides Active against the Rice Blast Pathogen .

Int J Mol Sci 2021 Apr 2;22(7). Epub 2021 Apr 2.

Department of Food, Environmental and Nutritional Science (DeFENS), University of Milan, 20133 Milan, Italy.

The increasing emergence of fungicide-resistant pathogens requires urgent solutions for crop disease management. Here, we describe a structural investigation of new fungicides obtained by combining strobilurin and succinate dehydrogenase inhibitor pharmacophores. We identified compounds endowed with very good activity against wild-type , combined in some cases with promising activity against strobilurin-resistant strains. Read More

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Differential Cytotoxicity Mechanisms of Copper Complexed with Disulfiram in Oral Cancer Cells.

Int J Mol Sci 2021 Apr 2;22(7). Epub 2021 Apr 2.

Department of Biochemistry, National Defense Medical Center, Taipei City 114, Taiwan.

Disulfiram (DSF), an irreversible aldehyde dehydrogenase inhibitor, is being used in anticancer therapy, as its effects in humans are known and less adverse than conventional chemotherapy. We explored the potential mechanism behind the cytotoxicity of DSF-Cu/Cu complexes in oral epidermoid carcinoma meng-1 (OECM-1) and human gingival epithelial Smulow-Glickman (SG) cells. Exposure to CuCl or CuCl slightly but concentration-dependently decreased cell viability, while DSF-Cu/Cu induced cell death in OECM-1 cells, but not SG cells. Read More

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The Role of the Rare Variants in the Genes Encoding the Alpha-Ketoglutarate Dehydrogenase in Alzheimer's Disease.

Life (Basel) 2021 Apr 6;11(4). Epub 2021 Apr 6.

Institute of Genomic Medicine and Rare Disorders, Semmelweis University, H-1082 Budapest, Hungary.

There is increasing evidence that several mitochondrial abnormalities are present in the brains of patients with Alzheimer's disease (AD). Decreased alpha-ketoglutarate dehydrogenase complex (αKGDHc) activity was identified in some patients with AD. The αKGDHc is a key enzyme in the Krebs cycle. Read More

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A predictive score at admission for respiratory failure among hospitalized patients with confirmed 2019 Coronavirus Disease: a simple tool for a complex problem.

Intern Emerg Med 2021 Apr 29. Epub 2021 Apr 29.

Department of Internal Medicine, University Hospital 12 de Octubre, Av Córdoba Km 5,400, 28041, Madrid, Spain.

Coronavirus Disease 2019 (COVID-19) pandemic has implacably stricken on the wellness of many countries and their health-care systems. The aim of the present study is to analyze the clinical characteristics of the initial wave of patients with COVID-19 attended in our center, and to identify the key variables predicting the development of respiratory failure. Prospective design study with concurrent data retrieval from automated medical records of all hospitalized adult patients who tested positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) rRT-PCR assay performed on respiratory samples from March 2nd to 18th, 2020. Read More

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Molecular mechanism of mitoquinol mesylate in mitigating the progression of hepatocellular carcinoma-in silico and in vivo studies.

J Cell Biochem 2021 Apr 28. Epub 2021 Apr 28.

Department of Science Laboratory Technology, Faculty of Science, Oyo State College of Agriculture and Technology, Igbo-ora, Oyo, Nigeria.

The safety and efficacy of mitoquinol mesylate (MitoQ) in attenuating the progression of hepatocellular carcinoma (HCC) in Wistar rats has been reported. However, the binding modes for MitoQ as well as its molecular mechanisms in cirrhosis and liver cancer have not been fully investigated. This study sought to understand the structural and molecular mechanisms of MitoQ in modulating the expression of nuclear factor erythroid 2-related factor 2 (Nrf2) and mitochondrial succinate dehydrogenase (SDH) in cirrhotic-HCC rats. Read More

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Identification and selection of optimal reference genes for qPCR-based gene expression analysis in Fucus distichus under various abiotic stresses.

PLoS One 2021 28;16(4):e0233249. Epub 2021 Apr 28.

Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America.

Quantitative gene expression analysis is an important tool in the scientist's belt. The identification of evenly expressed reference genes is necessary for accurate quantitative gene expression analysis, whether by traditional RT-PCR (reverse-transcription polymerase chain reaction) or by qRT-PCR (quantitative real-time PCR; qPCR). In the Stramenopiles (the major line of eukaryotes that includes brown algae) there is a noted lack of known reference genes for such studies, largely due to the absence of available molecular tools. Read More

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Space Flight-Associated Neuroocular Syndrome, Idiopathic Intracranial Hypertension, and Pseudotumor Cerebri: Phenotypic Descriptions, Pathogenesis, and Hydrodynamics.

Cureus 2021 Mar 25;13(3):e14103. Epub 2021 Mar 25.

Neurology, Flowers Medical Group, Dothan, USA.

Recent data from astronauts who have returned to Earth from a long-duration space flight have unequivocally distinguished spaceflight-associated neuro-ocular syndrome (SANS) from idiopathic intracranial hypertension (IIH) and pseudotumor cerebri (PTC). We review the semiology and pathogenesis of these three entities, noting that optic disc edema is what unites them, and this where the similarities between SANS and IIH/PTC end. We distinguish between PTC and IIH and between SANS and IIH/PTC and review the medical and surgical therapy of IIH/PTC. Read More

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The human brain acetylome reveals that decreased acetylation of mitochondrial proteins associates with Alzheimer's disease.

J Neurochem 2021 Apr 27. Epub 2021 Apr 27.

Brain and Mind Research Institute, Weill Cornell Medicine, Burke Neurological Institute, White Plains, New York, USA.

Metabolic changes that correlate to cognitive changes are well known in AD. Metabolism is often linked to functional changes in proteins by post-translational modifications. The importance of the regulation of transcription by acetylation is well documented. Read More

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Effect of respiratory inhibitors and quinone analogues on the aerobic electron transport system of Eikenella corrodens.

Sci Rep 2021 Apr 26;11(1):8987. Epub 2021 Apr 26.

Grupo de Investigación de Biomembranas (GIBIOM), CIFACS, Facultad Ciencias de La Salud, Centro Seccional de Investigación (CIUL), Universidad Libre Campus Barranquilla, Barranquilla, Colombia.

The effects of respiratory inhibitors, quinone analogues and artificial substrates on the membrane-bound electron transport system of the fastidious β-proteobacterium Eikenella corrodens grown under O-limited conditions were studied. NADH respiration in isolated membrane particles were partially inhibited by rotenone, dicoumarol, quinacrine, flavone, and capsaicin. A similar response was obtained when succinate oxidation was performed in the presence of thenoyltrifluoroacetone and N,N'-dicyclohexylcarbodiimide. Read More

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Deciphering the Probiotic Potential of Bacillus amyloliquefaciens COFCAU_P1 Isolated from the Intestine of Labeo rohita Through In Vitro and Genetic Assessment.

Probiotics Antimicrob Proteins 2021 Apr 26. Epub 2021 Apr 26.

Fish Health Management & Exotics Division, ICAR-National Bureau of Fish Genetics Resources, Lucknow, 226002, UP, India.

In this study, a bacterial strain COFCAU_P1, isolated from the digestive tract of a freshwater teleost rohu (Labeo rohita), was identified as Bacillus amyloliquefaciens using 16S rRNA gene sequence analysis combined with amplification of species-specific BamHI and barnase genes. The probiotic potential of the strain was evaluated using an array of in vitro tests along with safety and genetic analyses. The isolate showed potent antimicrobial response against several fish pathogenic bacteria, survived a wide pH range (2-9), and was resistant up to 10% bile salt concentration. Read More

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Polymyxin Resistance Among XDR ST1 Carbapenem-Resistant Clone Expanding in a Teaching Hospital.

Front Microbiol 2021 26;12:622704. Epub 2021 Mar 26.

Laboratory of Molecular Epidemiology and Microbiology, Department of Physics and Interdisciplinary Science, São Carlos Institute of Physics, University of São Paulo, São Paulo, Brazil.

is an opportunistic pathogen primarily associated with multidrug-resistant nosocomial infections, for which polymyxins are the last-resort antibiotics. This study investigated carbapenem-resistant strains exhibiting an extensively drug-resistant (XDR) phenotype, including four isolates considered locally pan drug-resistant (PDR), isolated from inpatients during an outbreak at a teaching hospital in Brazil. ApaI DNA macrorestriction followed by PFGE clustered the strains in three pulsotypes, named A to C, among carbapenem-resistant strains. Read More

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Calvin-Benson cycle regulation is getting complex.

Trends Plant Sci 2021 Apr 20. Epub 2021 Apr 20.

Department of Pharmacy and Biotechnology, University of Bologna, I-40126, Bologna, Italy. Electronic address:

Oxygenic phototrophs use the Calvin-Benson cycle to fix CO during photosynthesis. In the dark, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and phosphoribulokinase (PRK), two enzymes of the Calvin-Benson cycle, form an inactive complex with the regulatory protein CP12, mainly under the control of thioredoxins and pyridine nucleotides. In the light, complex dissociation allows GAPDH and PRK reactivation. Read More

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