Anti-MERS-CoV Spike Protein S1 polyclonal antibody (CABT-B1960)

Rabbit Anti-MERS-CoV Spike Protein S1 (aa 1-725) polyclonal antibody for ELISA, WB

Specifications


Host Species
Rabbit
Antibody Isotype
IgG
Species Reactivity
MERS-CoV
Immunogen
Recombinant MERS-CoV (NCoV / Novel coronavirus) Spike Protein S1 (aa 1-725) Protein
Conjugate
Unconjugated

Applications


Application Notes
WB: 0.5-1 μg/ml
ELISA: 0.1-0.2 μg/ml
*Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own experiment using appropriate negative and positive controls.

Target


Alternative Names
Middle East respiratory symptom coronavirus Spike Protein S1 subunit

Citations


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References


Structural Definition of a Neutralization-Sensitive Epitope on the MERS-CoV S1-NTD

CELL REPORTS

Authors: Wang, Nianshuang; Rosen, Osnat; Wang, Lingshu; Turner, Hannah L.; Stevens, Laura J.; Corbett, Kizzmekia S.; Bowman, Charles A.; Pallesen, Jesper; Shi, Wei; Zhang, Yi; Leung, Kwanyee; Kirchdoerfer, Robert N.; Becker, Michelle M.; Denison, Mark R.; Chappell, James D.; Ward, Andrew B.; Graham, Barney S.; McLellan, Jason S.

Middle East respiratory syndrome coronavirus (MERS-CoV) emerged into the human population in 2012 and has caused substantial morbidity and mortality. Potently neutralizing antibodies targeting the receptor-binding domain (RBD) on MERS-CoV spike (S) protein have been characterized, but much less is known about antibodies targeting non-RBD epitopes. Here, we report the structural and functional characterization of G2, a neutralizing antibody targeting the MERS-CoV S1 N-terminal domain (S1-NTD). Structures of G2 alone and in complex with the MERS-CoV S1-NTD define a site of vulnerability comprising two loops, each of which contain a residue mutated in G2-escape variants. Cell-surface binding studies and in vitro competition experiments demonstrate that G2 strongly disrupts the attachment of MERS-CoV S to its receptor, dipeptidyl peptidase-4 (DPP4), with the inhibition requiring the native trimeric S conformation. These results advance our understanding of antibody-mediated neutralization of coronaviruses and should facilitate the development of immunotherapeutics and vaccines against MERS-CoV.

Superior immune responses induced by intranasal immunization with recombinant adenovirus-based vaccine expressing full-length Spike protein of Middle East respiratory syndrome coronavirus

PLOS ONE

Authors: Kim, Myung Hee; Kim, Hyun Jik; Chang, Jun

Middle East respiratory syndrome coronavirus (MERS-CoV) causes an acute and severe lower respiratory illness as well as vomiting, diarrhea, and renal failure. Because no licensed MERS-CoV vaccines are currently available, preventive and therapeutic measures are urgently needed. The surface spike (S) glycoprotein of MERS-CoV, which binds to the cellular receptor dipeptidyl peptidase 4 (DPP4), is considered as a major target for MERS-CoV vaccine development. Here, we designed recombinant replication-deficient adenovirus-based vaccines expressing the N-terminal domain (rAd/NTD) and receptor-binding domain (rAd/RBD) of the MERS-CoV S1 subunit and full-length Spike protein (rAd/Spike). We found that immunization with candidate vaccines via intranasal route induced S1-specific IgG antibodies and neutralizing antibodies against MERS spike pseudotyped virus. Especially, rAd/Spike induced the highest neutralizing antibody titer and the strongest cytokine-induced T cell responses among the three candidate vaccines. To compare the immune responses induced by different administration routes, rAd/Spike was administered via intranasal, sublingual, or intramuscular route. All these administration routes exhibited neutralizing effects in the serum. MERS-CoV-specific neutralizing IgA antibodies in the bronchoalveolar lavage fluid were only induced by intranasal and sublingual administration but not by intramuscular administration. Intranasal administration with rAd/Spike also created resident memory CD8 T cells in the airway and lung parenchyma. Taken together, our results showed that both the humoral and cellular immune responses are highly induced by rAd/Spike administration, suggesting that rAd/Spike may confer protection against MERS-CoV infection.

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