The invention provides a KRT31
gene knockout
cell line and application of the KRT31
gene knockout
cell line in promotion of
small RNA viridae
virus replication and / or production of
small RNA viridae
virus vaccines, and belongs to the technical field of
gene engineering. The invention provides an application of a KRT31 gene or an encoded
protein thereof as a target spot in preparation of a product for regulating and controlling
virus replication of a
small RNA viridae and / or
vaccine production. The up-regulation of the expression level of the KRT31 gene can inhibit the virus replication of the small
RNA viridae, and the reduction of the expression level of the KRT31 gene can promote the virus replication of the small
RNA viridae. According to the invention, the sgRNA knockout KRT31 gene is adopted to prepare a
cell line with lost gene coding
protein function, so that the replication of small
RNA viridae viruses is promoted, the virus
titer and the
antigen yield are improved, and the efficient preparation of small RNA viridae virus vaccines is facilitated.