Publications by authors named "Omari K"

According to the FAO, 828 million people were facing acute food insecurity in 2021. Fertilization is a critical input factor in crop production and food security achievement. Therefore, fertilization is a critical input factor in crop production and food security achievement.

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The enterobacterial common antigen (ECA) is conserved in Gram-negative bacteria of the order although its function is debated. ECA biogenesis depends on the Wzx/Wzy-dependent strategy whereby the newly synthesized lipid-linked repeat units, lipid III, are transferred across the inner membrane by the lipid III flippase WzxE. WzxE is part of the Wzx family and required in many glycan assembly systems, but an understanding of its molecular mechanism is hindered due to a lack of structural evidence.

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The replication of RNA viruses relies on the activity of RNA-dependent RNA polymerases (RdRps). Despite large variations in their genomic sequences, viral RdRps share a common architecture generally known as a closed right hand. The P2 polymerase of cystovirus φ6 is currently among the best characterized viral RdRps.

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AlphaFold2 has revolutionized structural biology by offering unparalleled accuracy in predicting protein structures. Traditional methods for determining protein structures, such as X-ray crystallography and cryo-electron microscopy, are often time-consuming and resource-intensive. AlphaFold2 provides models that are valuable for molecular replacement, aiding in model building and docking into electron density or potential maps.

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  • Diabetes management is crucial, and therapeutic drug monitoring, particularly for medications like metformin and glimepiride, can help maintain optimal dosages in patients.
  • A study involving 106 type 2 diabetes patients used a validated LC-MS/MS method to measure drug levels and examined the relationship between drug concentration and genetic mutations, particularly focusing on the SULT1A1 genotype.
  • Findings indicated a potential correlation between metformin levels and genetic factors, suggesting that tailored (genotype-guided) drug therapy could enhance treatment effectiveness and reduce adverse effects.
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  • This study focuses on the health concerns related to the leaves of a plant from the Solanaceae family, specifically examining their antioxidant activity and polyphenol content.
  • The researchers compared two extraction methods—Methanol-Conventional (MC) and deep eutectic solvents (DES)—and found that the DES method yielded a higher concentration of phenols and flavonoids, as well as more nicotine.
  • Despite both extraction methods showing weak antioxidant activity, the DES method demonstrated superior efficiency and environmental benefits for extracting bioactive compounds from the plant.
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The insulin-linked polymorphic region is a variable number of tandem repeats region of DNA in the promoter of the insulin gene that regulates transcription of insulin. This region is known to form the alternative DNA structures, i-motifs and G-quadruplexes. Individuals have different sequence variants of tandem repeats and although previous work investigated the effects of some variants on G-quadruplex formation, there is not a clear picture of the relationship between the sequence diversity, the DNA structures formed, and the functional effects on insulin gene expression.

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  • The Bluetongue virus has multiple structural layers, with an inner core forming before outer proteins VP2 and VP5 are added.
  • VP5 changes shape in response to pH and acts like a motor that aids the virus in entering cells.
  • VP5's insertion equalizes the two pits on the virus core, which helps destabilize its attachment and allows for cell entry when pH drops.
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  • Twisted gastrulation (TWSG1) is a key protein that regulates Bone Morphogenetic Protein (BMP) signaling, which is important for various biological processes like embryonic development, kidney regeneration, and cancer.
  • Researchers determined the crystal structures of TWSG1 both alone and with a BMP ligand, illustrating how TWSG1's distinct domains interact with BMPs and their antagonist Chordin.
  • TWSG1 inhibits BMP signaling in lab experiments, and mutations affecting its BMP-binding ability disrupt this inhibition, demonstrating the crucial role of TWSG1 in regulating BMP activity and its evolutionary conservation across species.
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Integration of extracellular signals by neurons is pivotal for brain development, plasticity, and repair. Axon guidance relies on receptor-ligand interactions crosstalking with extracellular matrix components. Semaphorin-5A (Sema5A) is a bifunctional guidance cue exerting attractive and inhibitory effects on neuronal growth through the interaction with heparan sulfate (HS) and chondroitin sulfate (CS) glycosaminoglycans (GAGs), respectively.

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The effect of vine leaves processing techniques on Azoxystrobin, Fenazaquin, and Indoxacarb residues was investigated. Residue extraction following field application of pesticides and leaf processing was carried out using the QuEChERS method, with analysis conducted by LC-MS/MS. In dry conservation, Azoxystrobin's half-life was estimated to exceed a year, Fenazaquin's was 18 days, and Indoxacarb's was 142 days.

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Pestiviruses, within the family Flaviviridae, are economically important viruses of livestock. In recent years, new pestiviruses have been reported in domestic animals and non-cloven-hoofed animals. Among them, atypical porcine pestivirus (APPV) and Norway rat pestivirus (NRPV) have relatively little sequence conservation in their surface glycoprotein E2.

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Objectives: The contamination of fresh surface waters poses a significant burden on human health and prosperity, especially in marginalized communities with limited resources and inadequate infrastructure. Here, we performed in-depth genomic analyses of multidrug-resistant bacteria (MDR-B) isolated from Al-Oueik river water that is used for irrigation of agricultural fields in a disenfranchised area that also hosts a makeshift Syrian refugee camp.

Methods: A composite freshwater sample was filtered.

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Objectives: In-depth phenotypic and genomic analyses on a carbapenem-resistant Escherichia coli isolate, recovered from the faeces of a farm dog in Lebanon, focusing on its antimicrobial resistance (AMR) patterns and the underlying resistome.

Methods: E. coli strain EC-106 was identified using MALDI-TOF-MS.

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α5 subunit-containing γ-aminobutyric acid type A (GABA) receptors represent a promising drug target for neurological and neuropsychiatric disorders. Altered expression and function contributes to neurodevelopmental disorders such as Dup15q and Angelman syndromes, developmental epilepsy and autism. Effective drug action without side effects is dependent on both α5-subtype selectivity and the strength of the positive or negative allosteric modulation (PAM or NAM).

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Despite recent advances in cryo-electron microscopy and artificial intelligence-based model predictions, a significant fraction of structure determinations by macromolecular crystallography still requires experimental phasing, usually by means of single-wavelength anomalous diffraction (SAD) techniques. Most synchrotron beamlines provide highly brilliant beams of X-rays of between 0.7 and 2 Å wavelength.

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Plant extracts and their individual components have been used to manage skin aging for several decades. Recently, the discovery of new natural bioactive agents, that not only enhance the skin health but also offer protection against various deleterious factors, such as free radicals, ultraviolet radiation, and microbial infections, has been a potential target by many researchers. The aim of the current work was to investigate the phytochemical profile of an ethanol bark extract from , and to evaluate its antioxidant, antiaging and antibacterial activities .

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Article Synopsis
  • CD46 is a transmembrane protein involved in complement activation and various processes, including T-cell activation and reproduction, and acts as a receptor for many pathogens.
  • The study focuses on bovine CD46 (bovCD46) and its structure, which resembles human CD46 and has a unique hockey stick-like appearance due to its four-short-consensus-repeat (SCR) arrangement.
  • Understanding the structure and interaction site of bovCD46 with bovine viral diarrhoea virus can help develop future control strategies for this economically important disease in cattle.
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Objective: Graviola is a tropical fruit with medicinal properties, used for treating various diseases such as inflammation, diabetes, and cancer. Histone deacetylase inhibitors (HDACIs), including carbamazepine (CBZ) and valproic acid (VPA), have been proven strong inhibitors against cancer cell growth. This study investigated the effect of Graviola fruit extract (GFE) on CBZ in healthy rat plasma using high-performance liquid chromatography (HPLC).

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Dairy foods are a staple in Lebanon, a low- and middle-income country that has been experiencing serious challenges to food safety and antimicrobial stewardship among other issues. The microbiological acceptability of dairy products has been of increasing concern. This is partially due to the failing economy and prolonged power outages that affect the quality of raw material and disrupt the dairy cold chain, respectively.

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is the etiologic agent of bovine tuberculosis (BTB), a serious infectious disease in both humans and animals. BTB is a zoonotic disease primarily affecting cattle and occasionally humans infected through close contact with infected hosts or the consumption of unpasteurized dairy products. Zoonotic tuberculosis is strongly associated with poverty and poor hygiene, and low- and middle-income countries bear the brunt of the disease.

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Bed sediments were collected monthly at the outlet of the Ibrahim River between May 2016 and July 2017. Their physical and chemical characteristics were studied to highlight the impact of seasonal variations and discharge on the sediments' geochemical signatures. Granulometric analysis showed that samples collected after rain events contained abundant sand fractions (> 80%), while the clay fraction was more present at the beginning of the dry season, at low monthly average flows (1 m/s).

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