A5001413815- Protein Structure and Dynamics
- NMR spectroscopy and applications
- Advanced NMR Techniques and Applications
- Supramolecular Self-Assembly in Materials
- SARS-CoV-2 and COVID-19 Research
- Viral gastroenteritis research and epidemiology
- Polysaccharides Composition and Applications
- Antibiotic Resistance in Bacteria
- Protein Interaction Studies and Fluorescence Analysis
- Helminth infection and control
- Probiotics and Fermented Foods
- Alzheimer's disease research and treatments
- Chemical Synthesis and Analysis
- Computational Drug Discovery Methods
- Epigenetics and DNA Methylation
- Antimicrobial Resistance in Staphylococcus
- Parasitic Diseases Research and Treatment
- Cancer-related Molecular Pathways
- Biochemical and Structural Characterization
- Bioinformatics and Genomic Networks
- Graphene and Nanomaterials Applications
- Plant and fungal interactions
- Multicomponent Synthesis of Heterocycles
- Nanocluster Synthesis and Applications
- Polysaccharides and Plant Cell Walls
New York University Abu Dhabi
2019-2025
New York University
2020-2025
UConn Health
2023
University of Udine
2018-2022
Indian Institute of Science Bangalore
2016-2021
Istituto Nazionale Biostrutture e Biosistemi
2020
Abstract Missense mutations in p53 are severely deleterious and occur over 50% of all human cancers. The majority these located the inherently unstable DNA-binding domain (DBD), many which destabilize further expose its aggregation-prone hydrophobic core, prompting self-assembly mutant into inactive cytosolic amyloid-like aggregates. Screening an oligopyridylamide library, previously shown to inhibit amyloid formation associated with Alzheimer’s disease type II diabetes, identified a...
Abstract Penicillin-binding proteins (PBPs) are essential for the formation of bacterial cell wall. They also targets β-lactam antibiotics. In Enterococcus faecium , high levels resistance to β-lactams associated with expression PBP5, higher distinct PBP5 variants. To define molecular mechanism PBP5-mediated we leveraged biomolecular NMR spectroscopy – due its size (>70 kDa) a challenging target. Our data show that resistant variants significantly increased dynamics either alone or upon...
Parasitic helminths are a major global health threat, infecting nearly one-fifth of the human population and causing significant losses in livestock crops. Resistance to few anthelmintic drugs is increasing. Here, we report set avocado fatty alcohols/acetates (AFAs) that exhibit nematocidal activity against four veterinary parasitic nematode species: Brugia pahangi, Teladorsagia circumcincta Heligmosomoides polygyrus, as well multidrug resistant strain (UGA) Haemonchus contortus. AFA shows...
The extracellular matrix (ECM) plays a pivotal role in immunomodulation, providing structural and biochemical cues that shape immune cell function. In pathological conditions like cancer chronic inflammation, dysregulated remodeling often results altered ECM composition architecture, with fibrillar alignment being hallmark linked to disease progression. Here, how influences dendritic (DC) behavior using 3D biomimetic collagen matrices controlled fibril anisotropy is investigated. This show...
Abstract Bacterial type IV pili (T4P) are polymeric protein nanofibers that have diverse biological roles. Their unique physicochemical properties mark them as a candidate biomaterial for various applications, yet difficulties in producing native T4P hinder their utilization. Recent effort to mimic the of metal‐reducing Geobacter sulfurreducens bacterium led design synthetic peptide building blocks, which self‐assemble into T4P‐like nanofibers. Here, it is reported efficiently bind metal...
Abstract Following the entry into host cell, SARS‐CoV‐2 replication is mediated by transcription complex (RTC) assembled through a number of nonstructural proteins (Nsps). A monomeric form Nsp9 particularly important for RTC assembly and function. In present study, 136 unique nanobodies targeting are generated. Several belonging to different B‐cell lineages expressed, purified, characterized. Results from immunoassays applied purified neat saliva coronavirus disease (COVID‐19) patients show...
The interaction between SARS-CoV-2 non-structural protein Nsp9 and the nanobody 2NSP90 was investigated by NMR spectroscopy using paramagnetic perturbation methodology PENELOP (Paramagnetic Equilibrium vs Nonequilibrium magnetization Enhancement or LOss Perturbation). monomer is an essential component of replication transcription complex (RTC) that reproduces viral gRNA for subsequent propagation. Therefore preventing recruitment in RTC would represent efficient antiviral strategy could be...
Biomolecular electrostatics is of key importance for biological function and recognition. The continuum electrostatic model based on the Poisson-Boltzmann (PB) equation has been widely used to study biomolecular electrostatics. solution PB gives potential over space enclosing molecule(s) interest, typically obtained at points a suitable grid. Generalized Born (GB) provide useful approximation by solving numerically equation. main advantage GB approach express energy system as sum pairwise...
Background: The interaction between proteins and nanoparticles is a very relevant subject because of the potential applications in medicine material science general. Further interest derives from amyloidogenic character considered protein, β2-microglobulin (β2m), which may be regarded as paradigmatic system for possible therapeutic strategies. Previous evidence showed fact that gold (AuNPs) are able to inhibit β2m fibril formation vitro. Methods: NMR (Nuclear Magnetic Resonance) ESR...
The nature of the nanoparticle-protein corona is emerging as a key aspect in determining impact nanomaterials on proteins and general biological response. We previously demonstrated that citrate-stabilized gold nanoparticles (Cit-AuNPs) interact with β2-microglobulin (β2m) preserving protein native structure. Moreover, Cit-AuNPs are able to hinder vitro fibrillogenesis β2m pathologic variant, namely D76N, by reducing oligomeric association solution. Here, we clarify characteristics...
Background: Nanobodies, or VHHs, are derived from heavy chain-only antibodies (hcAbs) found in camelids. They overcome some of the inherent limitations monoclonal (mAbs) and derivatives thereof, due to their smaller molecular size higher stability, thus present an alternative mAbs for therapeutic use. Two nanobodies, Nb23 Nb24, have been shown similarly inhibit self-aggregation very amyloidogenic variants β2-microglobulin. Here, structure was modeled with Chemical-Shift (CS)-Rosetta server...
Gold nanoparticles (AuNPs) have been proved to be ideal scaffolds build nanodevices whose performance can tuned by changing their coating.
Abstract In Silico searching for short antimicrobial peptides has revealed temporin‐ SH f as the (8 AA ), hydrophobic, broad spectrum, and natural peptide. Important drawback associated with is susceptibility of its bioactive conformation denaturation proteolytic degradation. current report, disulfide engineering strategy been adopted to improve stability f. The functionally non‐critical Leu4 Ile7 residues at i + 3 position helical were mutated cysteine disulfide. Designed [L4C,...
The effect of extrinsic paramagnetic probes on NMR relaxation rates for surface mapping proteins and other biopolymers is a widely investigated powerful technique. Here we describe new application those probes. It relies the setting delay to generate magnetization equilibrium off-equilibrium conditions, in order tailor extent steady state signal recovery with without water-soluble nitroxide Tempol. With this approach it possible identify signals whose affected by exchange processes and, from...
The tetrapeptides Li504 and Li520, differing in the modification of 4-trans-hydroxylation proline, are novel conopeptides derived from venom duct transcriptome marine cone snail Conus lividus. These predicted mature peptides homologous to active site motif oxidoreductases that catalyze oxidation, reduction, rearrangement disulfide bonds proteins. estimated reduction potential Li520 is within range potentials oxidoreductases, indicating they may oxidative folding conotoxins. Conformational...
Abstract The conformational characteristics of protected homo‐oligomeric Boc‐[β 3 (R)Val] n ‐OMe, = 1, 2, 3, 4, 6, 9, and 12 have been investigated in organic solvents using nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) absorption spectroscopy circular dichroism (CD) methods. detailed 1 H NMR analysis ‐OMe reveals that the peptide aggregates extensively CDCl , but is disaggregated 20%, (v/v) dimethyl sulfoxide (DMSO) CD OH. Limited assignment N‐terminus NH groups,...
PENELOP (Paramagnetic Equilibrium vs Nonequilibrium magnetization Enhancement or LOss Perturbation) is the presented nuclear magnetic resonance (NMR) approach to identify at once location of proteins' exposed surface, hindered accessibility, and exchange processes occurring on a μs–ms time scale. In addition mapping protein surface application this method under specific conditions makes it possible distinguish conformational mobility chemical processes, thereby providing an alternative...
Abstract Parasitic helminths are a major global health threat, infecting nearly one-fifth of the human population and causing significant losses in livestock crops. Resistance to few anthelmintic drugs is increasing. Here, we report set avocado fatty alcohols/acetates (AFAs) that exhibit nematocidal activity against four veterinary parasitic nematode species: Brugia pahangi , Teladorsagia circumcincta Heligmosomoides polygyrus as well multidrug resistant strain (UGA) Haemonchus contortus....
3,4-Dihydropyrimidin-2(1H)ones(thiones) (DHPM) and coumarin-3-carboxylic acid are obtained in excellent to good yield by employing green catalyst under solvent-free condition.The condensation of substituted arylaldehyde, 1,3-diketoester urea/thiourea the presence after 1 h stirring at 50C resulted DHPM.The reaction o-hydroxybenzaldehyde with Meldrum's sonication for a few minutes gave acid.Here, we have used Lewis RHA-SiO2(NPs)-BO3H3 derived from agro-waste rice husk, heterogeneous...
Inhibiting amyloid aggregation through high-turnover dynamic interactions could be an efficient strategy that is already used by small heat-shock proteins in different biological contexts. We report the of three topologically non-trivial, zinc-templated metal-organic assemblies, a [2]catenane, trefoil knot (TK), and Borromean rings, with two β2-microglobulin (β2m) variants responsible for amyloidotic pathologies. Fast exchange similar patterns preferred contact surface are observed NMR,...
Abstract The interaction between SARS-CoV-2 non-structural protein Nsp9 and the nanobody 2NSP90 was investigated by NMR spectroscopy using paramagnetic perturbation methodology PENELOP (Paramagnetic Equilibrium vs Nonequilibrium magnetization Enhancement or LOss Perturbation). monomer is an essential component of replication transcription complex (RTC) that reproduces viral gRNA for subsequent propagation. Therefore preventing recruitment in RTC would represent efficient antiviral strategy...