More information about how COVID affects humans

ʻO ka ʻike hou e pili ana i ka hoʻopili ʻana o COVID i nā kānaka

An association between SARS-CoV-2 and the eukaryotic host membrane is suspected. aie: JACS

The Australian Nuclear Science and Technology Organization’s National Deuteration Facility has provided deuterated cholesterol for global research to gain better understanding of the association of the COVID disease spike protein, SARS-Co-V-2, in human cells through membrane fusion mechanism.

In deuterated compounds, hydrogen is replaced by deuterium. The calculated cholesterol can be used as a molecular probe to determine how membrane fragments bind and to determine how cholesterol is distributed across the membrane.

Researchers from the Institut Laue-Langevin, the University of Cambridge and the Italian National Research Council explained how fusion peptides, short-lived protein sequences, initiate disease with COVID using a model of membrane connection.

Peptides act at the bridge between the host membrane and the viral envelope to promote fusion.

A critical stage of the disease arises when the Spike protein envelope of the SARS-CoV-2 coronavirus combines with the host cell membrane to form the pathway for the disease to enter.

The research provides a detailed picture of the role of SARS-Co-V-2 Spike fusion peptides specific to the fusion process in a paper on Journal of the American Chemical Society. Because of its importance, the research is featured on the cover of the journal.

As well as describing two prospective molecular mechanisms, they found that calcium and cholesterol were converted to the interaction between the peptides and the host cell membrane.

The team of researchers used neutron analysis techniques, including neutron reflectometry and small neutron scattering, to be able to differentiate between the fragments of viral membranes and the receptors and other neutron technologies. and to understand the dynamic changes in the membranes.

Cholesterol is an important cell membrane type and plays an important role in learning.

“The deuterated cholesterol board provided a difference that could be separated from the other components,” explains Dr. Robert Russell.

They found that the presence or absence of calcium could affect the formation of the cholesterol base, making it thick or thin.

“The National Deuteration Facility is gaining a world name for supplying high -quality deuterated lipids, such as cholesterol, for biomedical research. We have a number of global organizations that support COVID research,” he said. said Dr. Tamim Darwish.

“Our factory can do the big, much -needed neutron experiments, and we keep them in stock.

“Although neutron scattering was carried out in connection with this research at the Institut Laue-Langevin in France, many users choose to come to ANSTO to use our neutron scattering devices because they can access easy to bespoke deuterated compounds from the NDF. “

ANSTO’s National Deuteration Facility is Australia’s only molecular deuteration facility, supported by the National Collaborative Research Infrastructure Strategy (NCRIS) —a project of the Australian Government.


Neutrons produce precise 3-D maps of water during cell membrane contact


More information:
Andreas Santamaria et al, Different Properties of SARS-CoV-2 Fusion Peptides Uncovered by Neutron Scattering, Journal of the American Chemical Society (2022). DOI: 10.1021 / jacs.1c09856

Courtesy of Australian Nuclear Science and Technology Organization (ANSTO)

Directions: More information on COVID infects humans (2022, April 15) Retrieved 16 April 2022 from https://phys.org/news/2022-04-covid-infects-humans.html

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