MERS-CoV Spike/S2 Protein (sf9, His)

The SARS-CoV Spike glycoprotein (S) has three subunits S1, S2' and S2 through alternative splicing. The engagement of the MERS-CoV spike protein S1 with CD26 (also known as dipeptidyl peptidase 4, DPP4) mediates viral attachment to host cells and virus鈥揷ell fusion, thereby initiating infection. S2 mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein and S2' is unmasked following S2 cleavage occurring upon virus endocytosis. MERS-CoV Spike/S2 Protein (sf9, His) is the recombinant Virus-derived MERS-CoV Spike/S2 protein, expressed by Sf9 insect cells , with C-His labeled tag. The total length of MERS-CoV Spike/S2 Protein (sf9, His) is 571 a.a., with molecular weight of ~63.84 kDa.

The MERS-CoV Spike glycoprotein (S) has three subunits S1, S2' and S2 through alternative splicing. S1 can attaches the virion to the cell membrane by interacting with host receptor, initiating the infection. S2' acts as a viral fusion peptide which is unmasked following S2 cleavage occurring upon virus endocytosis. S2 mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein.
Under the current model, S protein has at least three conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes.
The engagement of the MERS-CoV spike protein S1 with CD26 (also known as dipeptidyl peptidase 4, DPP4) mediates viral attachment to host cells and virus–cell fusion, thereby initiating infection^[1].

Virus

Sf9 insect cells

C-His

AFS88936 (D726-P1296)

14254594  [NCBI]

Approximately 63.84 kDa

Greater than 85% as determined by reducing SDS-PAGE

<1 EU/μg, determined by LAL method.