We describe a scalable device design of a dense array of multiple nanopores made from nanoscale semiconductor materials to detect and identify translocations of many biomolecules in a massively parallel detection scheme. We use molecular dynamics coupled to nanoscale device simulations to illustrate the ability of this device setup to uniquely identify DNA parallel translocations. We show that the transverse sheet currents along membranes are immune to the crosstalk effects arising from simultaneous translocations of biomolecules through multiple pores, due to their ability to sense only the local potential changes. We also show that electronic sensing across the nanopore membrane offers a higher detection resolution compared to ionic current blocking technique in a multipore setup, irrespective of the irregularities that occur while fabricating the nanopores in a two-dimensional membrane.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/acssensors.8b00192 | DOI Listing |
Nanoscale
December 2024
Computational Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.
Nanopores drilled in materials can electrophoretically drive charged biomolecules to enable their detection. Here, we explore and compare two-dimensional nanopores, graphene and MoS, in order to unravel their advantages and disadvantages with regard to protein detection. We tuned the protein translocation and its dynamics by the choice and concentration of the surrounding solvent.
View Article and Find Full Text PDFiScience
December 2024
Faculty and Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan.
MCFD2 and ERGIC-53 form a cargo receptor complex that plays a crucial role in transporting specific glycoproteins, including blood coagulation factor VIII, from the endoplasmic reticulum to the Golgi apparatus. We have demonstrated that MCFD2 recognizes a 10-amino-acid sequence in factor VIII, thereby facilitating its efficient transport. Moreover, the secretion of biopharmaceutical recombinant glycoproteins, such as erythropoietin, can be enhanced by tagging them with this sequence, which we have termed the "passport sequence" (PS).
View Article and Find Full Text PDFMethods Mol Biol
December 2024
Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India.
Fluorescence correlation spectroscopy (FCS) enables the measurement of fluctuations at fast timescales (typically few nanoseconds) and with high spatial resolution (tens of nanometers). This single-molecule measurement has been used to characterize single-molecule transport and flexibility of polymers and biomolecules such as DNA and RNA. Here, we apply this technique as dual-color fluorescence cross-correlation spectroscopy (dcFCCS) to identify the motor function of the tethering protein EEA1 and the small GTPase Rab5 by probing the flexibility changes through end-monomer fluctuations.
View Article and Find Full Text PDFJ Proteome Res
January 2025
Department of Microbiology, Faculty of Biology, Universidad de Sevilla, Av. de la Reina Mercedes 6, 41012 Sevilla, Spain.
Prokaryotes and eukaryotes secrete extracellular vesicles (EVs) into the surrounding milieu to preserve and transport elevated concentrations of biomolecules across long distances. EVs encapsulate metabolites, DNA, RNA, and proteins, whose abundance and composition fluctuate depending on environmental cues. EVs are involved in eukaryote-to-prokaryote communication owing to their ability to navigate different ecological niches and exchange molecular cargo between the two domains.
View Article and Find Full Text PDFChem Biol Interact
December 2024
Henan International Joint Laboratory for Nuclear Protein Regulation, School of Stomatology, School of Basic Medical Sciences, Henan University, Kaifeng, Henan 475004, China; Kaifeng Key Laboratory of Periodontal Tissue Engineering, School of Stomatology, Henan University, Kaifeng, Henan 475004, China; Department of Stomatology, Huaihe Hospital of Henan University, Kaifeng, Henan 475000, China. Electronic address:
Hydrogen sulfide (HS) is a potent redox-active signaling molecule commonly dysregulated in disease states. The production of HS and its involvement in various pathological conditions associated with mitochondrial dysfunction has been extensively documented. During stress, cystathionine gamma-lyase and cystathionine beta-synthase enzymes residing in cytosol are copiously translocated into the mitochondria to boost HS production, confirming its pivotal role in mitochondrial activities.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!