Anti-MERS-CoV Spike Protein monoclonal antibody (CABT-B1958)

Mouse Anti-MERS-CoV Spike Protein (aa 726-1296) monoclonal antibody for ELISA


Host Species
Antibody Isotype
Species Reactivity
Recombinant MERS-CoV (NCoV / Novel coronavirus) Spike Protein S2 (aa 726-1296)


Application Notes
ELISA: 0.5-1 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.


Alternative Names
Novel coronavirus Spike Protein


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Structural and Functional Basis of SARS-CoV-2 Entry by Using Human ACE2


Authors: Wang, Qihui; Zhang, Yanfang; Wu, Lili; Niu, Sheng; Song, Chunli; Zhang, Zengyuan; Lu, Guangwen; Qiao, Chengpeng; Hu, Yu; Yuen, Kwok-Yung; Wang, Qisheng; Zhou, Huan; Yan, Jinghua; Qi, Jianxun

The recent emergence of a novel coronavirus (SARS-CoV-2) in China has caused significant public health concerns. Recently, ACE2 was reported as an entry receptor for SARS-CoV-2. In this study, we present the crystal structure of the C -terminal domain of SARS-CoV-2 (SARS-CoV-2-CTD) spike (S) protein in complex with human ACE2 (hACE2), which reveals a hACE2-binding mode similar overall to that observed for SARSCoV. However, atomic details at the binding interface demonstrate that key residue substitutions in SARSCoV-2-CTD slightly strengthen the interaction and lead to higher affinity for receptor binding than SARSRBD. Additionally, a panel of murine monoclonal antibodies (mAbs) and polyclonal antibodies (pAbs) against SARS-CoV-Slireceptor-binding domain (RBD) were unable to interact with the SARS-CoV-2 S protein, indicating notable differences in antigenicity between SARS-CoV and SARS-CoV-2. These findings shed light on the viral pathogenesis and provide important structural information regarding development of therapeutic countermeasures against the emerging virus.

A Highly Immunogenic and Protective Middle East Respiratory Syndrome Coronavirus Vaccine Based on a Recombinant Measles Virus Vaccine Platform


Authors: Malczyk, Anna H.; Kupke, Alexandra; Pruefer, Steffen; Scheuplein, Vivian A.; Hutzler, Stefan; Kreuz, Dorothea; Beissert, Tim; Bauer, Stefanie; Hubich-Rau, Stefanie; Tondera, Christiane; Eldin, Hosam Shams; Schmidt, Joerg; Vergara-Alert, Julia; Suezer, Yasemin; Seifried, Janna; Hanschmann, Kay-Martin; Kalinke, Ulrich; Herold, Susanne; Sahin, Ugur; Cichutek, Klaus; Waibler, Zoe; Eickmann, Markus; Becker, Stephan; Muehlebach, Michael D.

In 2012, the first cases of infection with the Middle East respiratory syndrome coronavirus (MERS-CoV) were identified. Since then, more than 1,000 cases of MERS-CoV infection have been confirmed; infection is typically associated with considerable morbidity and, in approximately 30% of cases, mortality. Currently, there is no protective vaccine available. Replication-competent recombinant measles virus (MV) expressing foreign antigens constitutes a promising tool to induce protective immunity against corresponding pathogens. Therefore, we generated MVs expressing the spike glycoprotein of MERS-CoV in its full-length (MERS-S) or a truncated, soluble variant of MERS-S (MERS-solS). The genes encoding MERS-S and MERS-solS were cloned into the vaccine strain MVvac2 genome, and the respective viruses were rescued (MVvac2-CoV-S and MVvac2-CoV-solS). These recombinant MVs were amplified and characterized at passages 3 and 10. The replication of MVvac2-CoV-S in Vero cells turned out to be comparable to that of the control virus MVvac2-GFP (encoding green fluorescent protein), while titers of MVvac2-CoV-solS were impaired approximately 3-fold. The genomic stability and expression of the inserted antigens were confirmed via sequencing of viral cDNA and immunoblot analysis. In vivo, immunization of type I interferon receptor-deficient (IFNAR(-/-))-CD46Ge mice with 2 x 10(5) 50% tissue culture infective doses of MVvac2-CoV-S(H) or MVvac2-CoV-solS(H) in a prime-boost regimen induced robust levels of both MV- and MERS-CoV-neutralizing antibodies. Additionally, induction of specific T cells was demonstrated by T cell proliferation, antigen-specific T cell cytotoxicity, and gamma interferon secretion after stimulation of splenocytes with MERS-CoV-S presented by murine dendritic cells. MERS-CoV challenge experiments indicated the protective capacity of these immune responses in vaccinated mice. IMPORTANCE Although MERS-CoV has not yet acquired extensive distribution, being mainly confined to the Arabic and Korean peninsulas, it could adapt to spread more readily among humans and thereby become pandemic. Therefore, the development of a vaccine is mandatory. The integration of antigen-coding genes into recombinant MV resulting in coexpression of MV and foreign antigens can efficiently be achieved. Thus, in combination with the excellent safety profile of the MV vaccine, recombinant MV seems to constitute an ideal vaccine platform. The present study shows that a recombinant MV expressing MERS-S is genetically stable and induces strong humoral and cellular immunity against MERS-CoV in vaccinated mice. Subsequent challenge experiments indicated protection of vaccinated animals, illustrating the potential of MV as a vaccine platform with the potential to target emerging infections, such as MERS-CoV.

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