Medica 2026
Nov 16-19, 2026 - Düsseldorf, Germany

Coronavirus Antibodies

A class of single-stranded positive-sense RNA viruses known as coronaviruses have their name from the crown-like structure visible through electron microscopy which comes from their surface spike glycoproteins. RNA viruses include coronaviruses which possess one of the largest genomes that encode replicase along with structural proteins (S, E, M, N) and accessory proteins. Coronaviruses represent an ongoing global public health challenge because their rapid mutation ability allows them to transmit between different hosts.

Coronavirus Classification

GenusSubgenus/LineageExample VirusesHost RangePathogenicity
Alpha-coronavirusTraditional α-CoVHCoV-229E, HCoV-NL63, PEDV, TGEVMammalsHumans: Common cold; Animals: Swine enteric diseases
Beta-coronavirusA group (Embecovirus)HCoV-OC43, MHVMammalsHumans: Common cold; Mice: Hepatitis and neurological damage
B group (Sarbecovirus)SARS-CoV, SARS-CoV-2Humans, batsHumans: Severe pneumonia, multi-organ failure
C group (Merbecovirus)MERS-CoV, Bat-CoV HKU4/5Humans, camels, batsHumans: Severe pneumonia and renal failure
D group (Hibecovirus)Bat-CoV HKU9BatsAnimals: Asymptomatic or mild infection
Gamma-coronavirusNo clear subgroupsIBV, Whale-CoV SW1Birds, marine mammalsBirds: Respiratory diseases; Marine mammals: Enteric infections
Delta-coronavirusNo subgroupsPDCoV, Avian-CoVPigs, chickens, ducksPigs: Enteric diseases; Birds: Mild respiratory symptoms

Note: Porcine Epidemic Diarrhea Virus is the full name of PEDV while Transmissible Gastroenteritis Virus defines TGEV. IBV stands for Infectious Bronchitis Virus.

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Coronaviruses Resource Center

SARS-CoVMERS-CoVSARS-CoV-2
Receptor and Invasion MechanismACE2 receptor: S protein binds to ACE2 via RBD, TMPRSS2 protease cleaves to activate membrane fusionDPP4 receptor: S protein binds to DPP4, primarily infects respiratory and renal epithelial cellsACE2 receptor: S protein RBD binds to ACE2, Furin protease cleavage site (RRAR) enhances activation efficiency; TMPRSS2 or Furin cleavage promotes membrane fusion
Variation and Immune EvasionLow variation rate, no significant immune evasion variantsModerate variation rate, S protein L506F mutation enhances DPP4 binding stabilityHigh variation rate: Delta variant increases transmissibility by 60%; Omicron variant shows significant immune evasion but reduced pathogenicity
Key Molecular MechanismsE protein activates NLRP3 inflammasome: induces IL-1β secretion, exacerbates lung inflammationORF4a inhibits interferon: blocks antiviral signaling by binding to MDA5ORF9b-Tom70 interaction: inhibits mitochondrial antiviral signaling protein (MAVS), weakens innate immune response
Disease CharacteristicsSevere pneumonia with acute lung injury, cytokine storm leading to multi-organ failureSevere pneumonia combined with renal failure, gastrointestinal symptomsPrimarily mild cases, severe manifestations include hypoxemia and thrombotic complications; "long COVID" sequelae (fatigue, cognitive impairment) are common

 Key Protein-Protein Interaction Networks and Therapeutic Targets

Pathogenic StageViral ProteinHost Protein/FactorInteraction MechanismIntervention Strategy
Viral EntrySpike (RBD)ACE2/DPP4Spike RBD binds to host receptor via polar residues, initiating membrane fusion1. Recombinant soluble ACE2 neutralizes the virus
2. RBD monoclonal antibodies block receptor binding
Membrane FusionSpike (S2 subunit)TMPRSS2/FurinTMPRSS2 or Furin cleaves the S1/S2 site of Spike, activating fusion peptide to drive viral-host membrane fusion1. TMPRSS2 inhibitors
2. 6-HB peptide (EK1) blocks fusion
Viral ReplicationN protein, Non-structural proteins, Accessory proteinsG3BP1 + PI4K-IIIβN protein binds to G3BP1 to inhibit stress granule formation; PI4K-IIIβ generates PI4P to construct viral replication factories1. PI4K-IIIβ inhibitors disrupt replication factories
2. G3BP1 agonists restore stress granules
Immune EvasionORF8, ORF6, M proteinSTAT1 + MHC-IORF6 binds to KPNA2 to block STAT1 nuclear entry; M protein inhibits STAT1 phosphorylation, interfering with Type I interferon signaling1. JAK-STAT activators restore interferon signaling
2. MHC-I agonists enhance antigen presentation
Inflammatory DamageE protein, ORF3aNLRP3 + NF-κBE protein activates NLRP3 inflammasome to release IL-1β; ORF3a activates NF-κB pathway to induce IL-6/TNF-α secretion1. NLRP3 inhibitors
2. NF-κB inhibitors reduce cytokine storm

Approved Vaccines and Technological Pathways

Part 01

mRNA Vaccines

Encode the S protein's RBD, inducing neutralizing antibodies and T-cell immunity.

Part 02

Adenovirus Vector Vaccines

Carry the S protein gene, activating both humoral and cellular immunity.

Part 03

Recombinant Protein Vaccines

Based on S protein trimer nanoparticles, combined with adjuvants to enhance immune responses.

Part 04

Inactivated Vaccines

Provide limited cross-protection against variants.

S: HR1/HR2 Fusion Domain

Peptide inhibitors designed to block membrane fusion in SARS-CoV-2, SARS-CoV, and MERS-CoV

S: Non-ACE2-Binding
Surfaces of RBD

Targeting conserved epitopes outside the receptor-binding interface to reduce mutational escape risk

Broad-Spectrum
Coronavirus Vaccine
Development
M Protein

Cross-reactive immunity induced by M protein-specific T-cell epitopes

N Protein

Highly conserved nucleocapsid protein; combining N protein with RBD-based vaccines enhances the breadth of T-cell responses

Coronavirus Antibody FAQs

Antibody FAQs

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Our antibodies serve mainly as research tools. Coronavirus antigen proteins detection and quantification through antibodies support scientific research on immune responses to the virus and enable the development of diagnostic kits and vaccines.

The recommended storage temperatures for antibodies are usually -20°C or 4°C and avoiding multiple freeze-thaw cycles ensures their activity and specificity remain intact. Despite antibodies not being typically biohazardous substances standard biosafety procedures should be implemented during handling to avoid contamination and accidental exposure.

To determine antibody specificityscientists must conduct cross-reactivity tests which compare antibody bindingto related viruses like SARS-CoV-1, MERS-CoV and cold coronaviruses toeliminate non-specific interactions. Western blot experiments require confirmationthat the observed band corresponds to the anticipated molecular weight of theintended protein. Under suitable conditions both knockdown and knockout of thetarget protein are possible to generate cell lines that serve as negativecontrols to validate antibody specificity.

You should confirm the following parameters:

  • Detection target (such as N protein, S1 subunit, or RBD)
  • Sample type compatibility (serum, cell supernatant, or tissue lysate)
  • Whether the detection range covers the expected concentration
  • Whether a standard curve calibration is provided

The experimental applicability of antibodies depends on their epitope recognition characteristics and host species. Antibodies targeting linear epitopes (like those for the C-terminal peptide of N protein) are more suitable for Western Blot, while conformational epitope antibodies (such as those recognizing S protein trimers) are better for flow cytometry and live cell imaging. Cross-species reactivity needs to be confirmed through validation, for example, rabbit-derived antibodies used on mouse tissues require species absorption treatment.

Chromatin Immunoprecipitation (ChIP) Protocol

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