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G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
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Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
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Types of Receptors: Cell Surface Receptors01:28

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Cell-surface receptors, also known as transmembrane receptors, are cell surface, membrane-anchored (integral) proteins that bind to external ligand molecules. This type of receptor spans the plasma membrane and performs signal transduction, converting an extracellular signal into an intracellular signal. Ligands that interact with cell-surface receptors do not have to enter the cell that they affect. Cell-surface receptors are also called cell-specific proteins or markers because they are...
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Cell adhesion is  an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain,...
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Engineering Antiviral Agents via Surface Plasmon Resonance
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Expression pattern and function of SARS-CoV-2 receptor ACE2.

Ruiting Li1, Chengfeng Qin1

  • 1State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China.

Biosafety and Health
|September 1, 2021
PubMed
Summary
This summary is machine-generated.

This study reviews the role of Angiotensin-converting enzyme 2 (ACE2) in SARS-CoV-2 entry. Understanding ACE2

Keywords:
ACE2Expression patternInteractionSARS-CoV-2

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Area of Science:

  • Virology and Molecular Biology
  • Immunology and Infectious Diseases

Background:

  • The emergence of SARS-CoV-2 in late 2019 has led to a global health crisis, prompting extensive research into the virus and its mechanisms.
  • Angiotensin-converting enzyme 2 (ACE2) has been identified as a critical receptor facilitating the cellular entry of SARS-CoV-2, making it a key focus of scientific investigation.

Purpose of the Study:

  • To synthesize current knowledge on the function, expression, and distribution of ACE2 in the human body and across different populations.
  • To elucidate the interaction mechanism between ACE2 and the SARS-CoV-2 spike (S) protein, emphasizing residues crucial for binding affinity and variants.

Main Methods:

  • Comprehensive literature review of recent scientific publications on ACE2 and SARS-CoV-2.
  • Analysis of molecular interactions between ACE2 and SARS-CoV-2 S protein, including key residue identification.
  • Comparative analysis of ACE2 characteristics across diverse human populations.

Main Results:

  • Detailed summary of ACE2's physiological roles, tissue expression patterns, and variations in distribution among human populations.
  • Identification of specific amino acid residues in ACE2 and the SARS-CoV-2 S protein that significantly influence viral binding.
  • Insights into how mutations in SARS-CoV-2 variants affect their interaction with ACE2, potentially impacting transmissibility and infectivity.

Conclusions:

  • A thorough understanding of ACE2's function and its interaction with SARS-CoV-2 is vital for comprehending viral pathogenesis.
  • This knowledge is instrumental in developing effective therapeutic strategies and predicting the behavior of emerging SARS-CoV-2 variants.
  • Further research into ACE2-viral interactions can guide the design of targeted treatments to combat COVID-19.