instruction:
In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
question:
Interferon lambda 4 (IFN4) has been recently known and studied for its role in hepatitis C virus (HCV) infection, but its clinical potential is significantly hampered due to its poor expression in vitro. Our study reports the successful production of IFN4 from a mammalian cell line through a glycoengineering and structure-based approach. We introduced de novo N-glycosylation of IFN4, guided by structural analysis, and produced IFN4 variants in Expi293F that displayed improved expression and potency. To preserve the structure and functionality of IFN4, the model structure of the IFN4 signaling complex was analyzed and the N-glycosylation candidate sites were selected. The receptor binding activity of engineered IFN4 variants and their receptormediated signaling pathway were similar to the E. coli version of IFN4 (eIFN4), while the antiviral activity and induction levels of interferon-stimulated gene (ISG) were all more robust in our variants. Our engineered IFN4 variants may be further developed for clinical applications and utilized in basic research to decipher the immunological roles of IFN4. Previously, the transient expression of wild-type IFN4 in mammalian cells failed to produce significant amounts of recombinant
answer:
Structure-based glycoengineering of interferon lambda 4 enhances its productivity and anti-viral potency

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In this review, we report that the receptor of mouse hepatitis virus (MHV), carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1), is an important determinant of mouse susceptibility to MHV infection. This finding was revealed by using mouse strains with two different allelic forms of the MHV receptor, Ceacam1a and Ceacam1b. Although previous studies indicated that susceptibility is determined by a single gene, Ceacam1, our recent work in gene-replaced mice with chimeric Ceacam1 pointed toward the involvement of other host factors (genes) in the susceptibility. Studies on mouse susceptibility to MHV, as well as the factors involved in their susceptibility, are overviewed.
answer:
MINI REVIEW ARTICLE Mouse hepatitis virus receptor as a determinant of the mouse susceptibility to MHV infection

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Porcine deltacoronavirus (PDCoV), is an emerging enteropathogenic coronavirus in pigs, that poses a novel threat to swine husbandry worldwide. Crucial to halting PDCoV transmission and infection is the development of effective therapies and vaccines. The spike (S) protein of coronavirus is the major target of host neutralizing antibodies, however the immunodominant neutralizing region in the S protein of PDCoV has not been defined. Here, three truncations of the PDCoV S protein were generated, the N-terminal domain of the S1 subunit (NTD, amino acids (aa) 50-286), the C-terminal domain of the S1 subunit (CTD, aa 278-616), and S2 subunit (aa 601-1087). The proteins were expressed using an E. coli expression system. Polyclonal antisera against the three recombinant proteins were produced in rabbits and mice. All three antisera were able to inhibit PDCoV infection in vitro, as determined by virus neutralization assay, fluorescent focus neutralization assay, and plaque-reduction neutralization. The CTD-specific antisera had the most potent PDCoV-neutralizing effect, indicating that the CTD region may contain the major neutralizing epitope(s) in the PDCoV S protein. Based on these findings, CTD may be a promising target for development of an effective vaccine against PDCoV infection in pigs.
answer:
Identification of the immunodominant neutralizing regions in the spike glycoprotein of porcine deltacoronavirus