Disclosed is a gene multiple insertion cassette set including rDNA NTS fragments and an auxotrophic selection marker having an incomplete promoter is developed, and a safe oral recombinant strain having no antibiotic resistant marker is constructed by multiple insertion of an optimum number of the developed gene multiple insertion cassette sets into chromosomes of a Saccharomyces cerevisiae strain, a vaccine composition including, as an active ingredient, the above strain, a culture product thereof, a cell lysate, or nodavirus capsid protein (NNVcp) isolated and purified therefrom, and a composition for feed addition including, as an active ingredient, the above strain, a culture product thereof, a cell lysate, or squalene or oxidosqualene isolated and purified therefrom.

Disclosed herein are modified capsid proteins comprising a capsid forming protein, a membrane binding element and an ESCRT-recruiting element, wherein at least one of the membrane binding element and the ESCRT-recruiting element is heterologous to the capsid forming protein. Disclosed are capsids comprising a plurality of modified capsid proteins. Disclosed are multimeric assemblies comprising a plurality of capsids within a membrane. Also disclosed are modified non-enveloped viruses comprising a capsid wherein the capsid comprises a plurality of modified capsid proteins, wherein the plurality of modified capsid proteins comprise a capsid forming protein, a membrane binding element and an ESCRT-recruiting element, wherein at least one of the membrane binding element and the ESCRT-recruiting element is heterologous to the modified capsid protein, wherein the capsid forming protein is a capsid forming protein of a non-enveloped virus.

Disclosed is a gene multiple insertion cassette set including rDNA NTS fragments and an auxotrophic selection marker having an incomplete promoter is developed, and a safe oral recombinant strain having no antibiotic resistant marker is constructed by multiple insertion of an optimum number of the developed gene multiple insertion cassette sets into chromosomes of a Saccharomyces cerevisiae strain, a vaccine composition including, as an active ingredient, the above strain, a culture product thereof, a cell lysate, or nodavirus capsid protein (NNVcp) isolated and purified therefrom, and a composition for feed addition including, as an active ingredient, the above strain, a culture product thereof, a cell lysate, or squalene or oxidosqualene isolated and purified therefrom.

Described herein are engineered nodaviral vectors, systems, and uses thereof. In some embodiments, the engineered nodaviral vectors and/or systems can be used to deliver a cargo, such as a nucleic acid cargo, to a cell or cell population, or a subject. In some embodiments, the cargo is a therapeutic or preventative.

Certain embodiments of the invention relate to mutant forms of flock house virus B2 protein characterized by having enhanced suppressor of RNA silencing activity as compared to wild type flock house virus B2 protein. Certain embodiments of the invention relate to nucleic acid sequences and vectors that encode and/or direct expression of such mutant forms of flock house virus B2 protein in eukaryotic cells. Certain embodiments of the invention relate to methods of using such mutant forms of flock house virus B2 protein and/or nucleic acid sequences and vectors that encode and/or direct expression thereof in eukaryotic cells to increase a replication rate of a plant or animal virus in a plant or animal cell.

The disclosure provides recombinant viral vectors and attenuated viruses and viral vaccines comprising a virus lacking a functional viral RNA suppressor of host RNAi.

Disclosed herein are modified capsid proteins comprising a capsid forming protein, a membrane binding element and an ESCRT-recruiting element, wherein at least one of the membrane binding element and the ESCRT-recruiting element is heterologous to the capsid forming protein. Disclosed are capsids comprising a plurality of modified capsid proteins. Disclosed are multimeric assemblies comprising a plurality of capsids within a membrane. Also disclosed are modified non-enveloped viruses comprising a capsid wherein the capsid comprises a plurality of modified capsid proteins, wherein the plurality of modified capsid proteins comprise a capsid forming protein, a membrane binding element and an ESCRT-recruiting element, wherein at least one of the membrane binding element and the ESCRT-recruiting element is heterologous to the modified capsid protein, wherein the capsid forming protein is a capsid forming protein of a non-enveloped virus.