Discover and read the best of Twitter Threads about #rbd

Most recents (8)

#Omicron features 50 mutations, with 15 mutations in the #RBD of the spike protein, which binds to the human #ACE2 for viral entry. However, it is not completely understood how these mutations alter the interaction and binding strength between the Omicron RBD and ACE2 1/
A new study by adopting a combined steered molecular dynamics (SMD) simulation and experimental microscale thermophoresis (MST) approach tried to quantify the interaction between Omicron RBD & ACE2. 2/
And what did they find?

Omicron brings an enhanced RBD-ACE2 interface through N501Y, Q493K/R, & T478K mutations; the changes further lead to unique interaction patterns, reminiscing the features of previously dominated variants, Alpha (N501Y) & Delta (L452R and T478K). 3/
Read 5 tweets
La #variante"Nu" B.1.1.529: segue un thread con le poche info che abbiamo. Ma non c'è da andare nel panico, ve lo spiego. Iniziamo. 1/21
#COVID19
Le autorità sudafricane sono allarmate per la rapida diffusione di una nuova #variante che in tre settimane è passata dall'1 al 30% di casi, soppiantando la #Delta (attualmente predominante nel mondo). Vediamo di cosa si tratta. 2/21
Si tratta di una variante di #SARSCoV2 emersa per la prima volta l’11 novembre 2021 a seguito di tre rilevamenti in #Botswana. 3/21
Read 21 tweets
In the endothelium,selective impairment of insulin-mediated NO production may contribute to the development of #hypertension, endothelial dysfunction, atherogenesis, insulin resistance. NO induces vasodilation and inhibits platelet aggregation, vascular smooth muscle cell growth
Angiotensin #Ang2 inhibits insulin-mediated PI3K pathway activation, thereby impairing endothelial NO production and Glut-4 translocation in insulin-sensitive tissues, which results in vascular and systemic insulin resistance, respectively.
On the other hand, Ang II enhances insulin-mediated activation of the mitogen-activated protein kinase (#MAPK) pathway, which leads to vasoconstriction and pathologic vascular cellular growth.
Read 14 tweets
01/ Vous voulez savoir :
- comment se protéger d’une #COVID sévère sans médicaments sur ordonnance ?
- pourquoi elle touche certaines personnes et pas d'autres ?
- ce qui cause les #EffetsSecondaires des #vaccins ?

#COVID_19 #covid19 #covid #coronavirus #vaccination

↓↓↓↓↓
02/ Jean-Marc Sabatier (@SabatierJeanMa1), Directeur de Recherche au CNRS depuis 32 ans, PhD/HDR en Biochimie et Microbiologie, nous explique tout cela dans une vidéo (crowdbunker.com/v/Mqr69rxT) dont je résume les 42 premières minutes dans ce #thread.
03/ Le virus #SARS-CoV-2 s’attaque au #SRA (le système rénine-angiotensine), un de nos systèmes de régulation les plus importants, responsable des fonctions autonomes rénales, pulmonaires, cardiovasculaires, de l’#immunité innée et du #microbiote intestinal.
Read 48 tweets
#Spike protein’ is the major target of #NAbs in infected/vaccinated people. The prefusion conformation of the Spike represents the most relevant target because Abs can successfully interfere w/ infection only if they prevent binding to target cells or prevent fusion itself 1/
Various approaches are adopted to express ‘#Spike’ protein in vivo, such as nucleic acid structures & virus vectors. Alternatively, other vaccine platforms like recombinant protein particles & inactivated vaccines can directly deliver this protein 2/
Most structural studies of the wild-type spike protein exhibited one #RBD in the 'open' conformation. By contrast, 2 or 3 RBDs were observed in the open conformation in the more infective #D614G mutant--the RBD #conformation plays a vital role in the infectivity of SARSCoV2 3/
Read 16 tweets
As a team of scientists from @scrippsresearch @karolinskainst @UniBonn @UniklinikBonn @IIIBonn @uni_tue @Illinois_Alma, we identified four potent neutralizing camelid nanobodies ...
Solved the #Xray structure of all four #nanobodies in complex with #SARSCoV2 spike #RBD @wchnihcholas and Ian Wilson ...
Used #CryoEM to determine that VHH E stabilizes the 3-up conformation of trimeric #SARSCoV2 spike @BMartinHallberg ...
Read 10 tweets
2.

"We must move on from Neoliberalism in the post-COVID era. The 'Great Reset' offers an opportunity to re-evaluate sacred cows, defining the pre-pandemic era: the coming #Industry40 and the digitization of countless economic activities."

weforum.org/agenda/2020/10…
3.

"The #COVID19 crisis is going to accelerate a number of changes and transformations in human society. Notably, the pandemic is expected to significantly accelerate the Fourth Industrial Revolution."

weforum.org/agenda/2020/10…
Read 26 tweets
"The live SARS-like coronavirus SL-CoV-WIV1 has been isolated for the first time from bat droppings; and such virus has been confirmed to invade the host cells through the ACE2 of human beings..." ImageImageImage
Bat Severe Acute Respiratory Syndrome-Like Coronavirus WIV1
Encodes an Extra Accessory Protein, ORFX, Involved in Modulation of the Host Immune Response. (2016) #ZhengLiShi #PeterDaszak #EcoHealth
Funding: #NIAID 110964 ImageImageImageImage
In this study, we have developed a fast and cost-effective method
for reverse genetics of coronaviruses by combining two approaches developed by others..As the genomes can be divided into multiple short fragments, mutations can be introduced into individual
fragments easily. ImageImageImageImage
Read 68 tweets

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