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dc.contributor.authorMäeots, Märt-Erik-
dc.contributor.authorLee, Byungjin-
dc.contributor.authorNans, Andrea-
dc.date.accessioned2024-04-24T03:54:42Z-
dc.date.available2024-04-24T03:54:42Z-
dc.date.issued2020-
dc.identifier.otherOER000000834vi
dc.identifier.urihttp://dlib.hust.edu.vn/handle/HUST/24597-
dc.descriptionTài liệu này được phát hành theo giấy phép CC-BY-NC-ND 4.0vi
dc.description.abstractMechanistic understanding of biochemical reactions requires structural and kinetic characterization of the underlying chemical processes. However, no single experimental technique can provide this information in a broadly applicable manner and thus structural studies of static macromolecules are often complemented by biophysical analysis. Moreover, the common strategy of utilizing mutants or crosslinking probes to stabilize otherwise short-lived reaction intermediates is prone to trapping off-pathway artefacts and precludes determining the order of molecular events. To overcome these limitations and allow visualisation of biochemical processes at near-atomic spatial resolution and millisecond time scales, we developed a time-resolved sample preparation method for cryo-electron microscopy (trEM). We integrated a modular microfluidic device, featuring a 3D-mixing unit and a delay line of variable length, with a gas-assisted nozzle and motorised plunge-freeze set-up that enables automated, fast, and blot-free sample vitrification. This sample preparation not only preserves high-resolution structural detail but also substantially improves protein distribution across the vitreous ice. We validated the method by examining the formation of RecA filaments on single-stranded DNA. We could reliably visualise reaction intermediates of early filament growth across three orders of magnitude on sub-second timescales. Quantification of the trEM data allowed us to characterize the kinetics of RecA filament growth. The trEM method reported here is versatile, easy to reproduce and thus readily adaptable to a broad spectrum of fundamental questions in biology.vi
dc.description.urihttps://www.biorxiv.org/content/10.1101/2020.03.04.972604v1vi
dc.formatPDFvi
dc.language.isoenvi
dc.publisherBiochemical Journalvi
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Vietnam*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/vn/*
dc.subjectSatructural biologyvi
dc.subjectcryo-EMvi
dc.subjectkinetic analysisvi
dc.subjectmicrofluidicsvi
dc.subject.lccQD405vi
dc.titleVisual Biochemistry: modular microfluidics enables kinetic insight from time-resolved cryo-EMvi
dc.typeJournal articlevi
Appears in Collections:OER - Kỹ thuật hóa học; Công nghệ sinh học - Thực phẩm; Công nghệ môi trường

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