Related Experiment Video

Updated: Jun 19, 2026

Analysis of Group IV Viral SSHHPS Using In Vitro and In Silico Methods
10:40

Analysis of Group IV Viral SSHHPS Using In Vitro and In Silico Methods

Published on: December 21, 2019

26.0K

Structural basis for the inhibition of the HCoV-NL63 main protease Mpro by X77

Jie Xu1, Qinyao Zhu2, Wenwen Li3

  • 1Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.

Biochemical and Biophysical Research Communications
|June 9, 2024
PubMed

Insights

Researchers studied the human coronavirus NL63 main protease (Mpro) and its interaction with the inhibitor X77. This research provides structural insights for developing broad-spectrum antiviral drugs against human coronaviruses.

Area of Science:

  • Virology
  • Structural Biology
  • Drug Discovery

Background:

  • Human coronaviruses cause respiratory and intestinal diseases, with significant complications.
  • The main protease (Mpro) is crucial for viral replication and a target for drug development.
  • The COVID-19 pandemic has intensified research into broad-spectrum antiviral therapies.

Purpose of the Study:

  • To elucidate the crystal structure of the HCoV-NL63 Mpro complexed with the inhibitor X77.
  • To analyze the detailed interaction between HCoV-NL63 Mpro and X77.
  • To compare the binding modes of X77 with SARS-CoV-2 Mpro and HCoV-NL63 Mpro.

Main Methods:

  • X-ray crystallography to determine the complex structure.
  • Molecular docking simulations to predict binding interactions.
  • Comparative structural analysis of inhibitor binding.

Main Results:

  • The crystal structure of the HCoV-NL63 Mpro-X77 complex was resolved.
  • Detailed analysis of the interaction revealed specific binding modes and determinants.
  • Comparison highlighted similarities and differences in X77 binding to different coronavirus Mpro enzymes.

Conclusions:

  • The study provides crucial structural information on HCoV-NL63 Mpro inhibition by X77.
  • These insights are vital for designing novel inhibitors targeting conserved Mpro active sites.
  • The findings support the development of broad-spectrum antiviral drugs against human coronaviruses.
Keywords:
HCoV-NL63InhibitorMain proteaseX77

More Related Videos

Identifying Inhibitors of the HBx-DDB1 Interaction Using a Split Luciferase Assay System05:55

Identifying Inhibitors of the HBx-DDB1 Interaction Using a Split Luciferase Assay System

Published on: December 21, 2019

6.7K
Engineering Antiviral Agents via Surface Plasmon Resonance13:00

Engineering Antiviral Agents via Surface Plasmon Resonance

Published on: June 14, 2022

2.3K

Related Concept Videos

Enzyme Inhibition01:30

Enzyme Inhibition

Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
Inhibitors of Bacterial DNA Synthesis01:28

Inhibitors of Bacterial DNA Synthesis

Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These antibiotics are selectively...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors Of Virion Release01:25

Inhibitors Of Virion Release

Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...