RNA binding motif protein 8A(RBM8A)is an RNA binding protein,which is mainly in-volved in translation and cell cycle regulation.In addition,RBM8A is a core factor of the exon-junc-tion complex(EJC),which is highly expressed in cells,especially in cancer cells,and abnormally expressed in cytoplasm and nucleus.Studies have shown that RBM8A plays a key regulatory role in the replication process of some viruses,such as Flaviviridae viruses.Therefore,whether RBM8A is involved in the replication of pseudorabies virus(PRV)is unknown.Therefore,this study proved whether RBM8A is involved in the replication of PRV.In order to study the effect of RBM8A pro-tein on PRV replication,the eukaryotic expression plasmid pCAGGS-HA-RBM8A was designed and constructed to express RBM8A,and sh-RBM8A was simultaneously designed and constructed to overexpress and inhibit RBM8A.qRT-PCR and Western blot were used to detect the effect of RBM8A on PRV replication.At the same time,PRV-GB standard plasmid was constructed to make PRV proliferation standard curve.After overexpression and inhibition of RBM8A,DNA was ex-tracted.Virus copy number was calculated by qRT-PCR to further detect the effect of RBM8A on PRV replication.The results showed that overexpression of RBM8A inhibited PRV replication and decreased the copy number of the virus,while overexpression of shRBM8A promoted PRV replication and increased the copy number of the virus.This study shows that RBM8A can inhibit PRV replication,which provides reference for the functional study of RBM8A and lays a founda-tion for the mechanism of anti-PRV replication.

Diseases caused by animal virus infection seriously restricts the healthy development of animal husbandry.In-depth study of the molecular mechanism of viral replication and pathogenesis will provide theoretical basis for screening vaccine and drug targets.N6-methyladenosine(m6 A)modification occurs extensively in viral and host transcriptomes and affects viral replication and pathogenicity by regulating gene expression,which acts as a novel regulator of gene expression in addition to DNA and protein modifications.Insight into the regulatory molecular mechanism of m6 A modification in virus infection is the research hotspots and frontiers.In recent years,there are re-ports of alternation of the m6 A modification-associated epitranscriptomes and related function a-nalysis during virus infection.Here,we summarize the alternation of the epitranscriptomes induced by African swine fever virus(ASFV),porcine reproductive and respiratory syndrome virus(PRRSV),porcine epidemic diarrhoea virus(PEDV),cestode virus(CSFV),porcine pseudorabies virus(PRV),Marek's disease virus(MDV),Newcastle disease virus(NDV),avian leukaemia virus(ALV)and duck hepatitis A virus(DHAV)infection,and the subsequent effects on viral replica-tion and pathogenicity.We also discuss the potential role and molecular mechanism of m6 A modification in animal virus replication and pathogenesis,which will contributes to the prevention and control for animal disease.

RNA binding motif protein 8A(RBM8A)is an RNA binding protein,which is mainly in-volved in translation and cell cycle regulation.In addition,RBM8A is a core factor of the exon-junc-tion complex(EJC),which is highly expressed in cells,especially in cancer cells,and abnormally expressed in cytoplasm and nucleus.Studies have shown that RBM8A plays a key regulatory role in the replication process of some viruses,such as Flaviviridae viruses.Therefore,whether RBM8A is involved in the replication of pseudorabies virus(PRV)is unknown.Therefore,this study proved whether RBM8A is involved in the replication of PRV.In order to study the effect of RBM8A pro-tein on PRV replication,the eukaryotic expression plasmid pCAGGS-HA-RBM8A was designed and constructed to express RBM8A,and sh-RBM8A was simultaneously designed and constructed to overexpress and inhibit RBM8A.qRT-PCR and Western blot were used to detect the effect of RBM8A on PRV replication.At the same time,PRV-GB standard plasmid was constructed to make PRV proliferation standard curve.After overexpression and inhibition of RBM8A,DNA was ex-tracted.Virus copy number was calculated by qRT-PCR to further detect the effect of RBM8A on PRV replication.The results showed that overexpression of RBM8A inhibited PRV replication and decreased the copy number of the virus,while overexpression of shRBM8A promoted PRV replication and increased the copy number of the virus.This study shows that RBM8A can inhibit PRV replication,which provides reference for the functional study of RBM8A and lays a founda-tion for the mechanism of anti-PRV replication.

Diseases caused by animal virus infection seriously restricts the healthy development of animal husbandry.In-depth study of the molecular mechanism of viral replication and pathogenesis will provide theoretical basis for screening vaccine and drug targets.N6-methyladenosine(m6 A)modification occurs extensively in viral and host transcriptomes and affects viral replication and pathogenicity by regulating gene expression,which acts as a novel regulator of gene expression in addition to DNA and protein modifications.Insight into the regulatory molecular mechanism of m6 A modification in virus infection is the research hotspots and frontiers.In recent years,there are re-ports of alternation of the m6 A modification-associated epitranscriptomes and related function a-nalysis during virus infection.Here,we summarize the alternation of the epitranscriptomes induced by African swine fever virus(ASFV),porcine reproductive and respiratory syndrome virus(PRRSV),porcine epidemic diarrhoea virus(PEDV),cestode virus(CSFV),porcine pseudorabies virus(PRV),Marek's disease virus(MDV),Newcastle disease virus(NDV),avian leukaemia virus(ALV)and duck hepatitis A virus(DHAV)infection,and the subsequent effects on viral replica-tion and pathogenicity.We also discuss the potential role and molecular mechanism of m6 A modification in animal virus replication and pathogenesis,which will contributes to the prevention and control for animal disease.

Ancylostoma ceylanicum is a zoonotic soil-derived nematode that parasitizes the intestines of humans and animals (dogs and cats), leading to malnutrition and iron-deficiency anemia. Helminth parasites secrete calreticulin (CRT), which regulates or blocks the host’s immune response. However, no data on A. ceylanicum calreticulin (Ace-CRT) are available. We investigated the biological function of recombinant Ace-CRT (rAce-CRT). rAce-CRT showed reliable antigenicity and stimulated the proliferation of mouse splenocytes and canine peripheral blood mononuclear cells. Quantitative reverse-transcription PCR assays revealed that rAce-CRT primarily promoted the expression of T helper 2 cytokines, particularly IL-13, in canine peripheral blood lymphocytes. rAce-CRT inhibited complement-mediated sheep erythrocyte hemolysis in vitro. Our findings indicate that Ace-CRT plays an immunomodulatory role and may be a promising candidate molecule for a hookworm vaccine.

The emergence of high virulent mutant strains of infectious bursal disease virus(IBDV)becomes a serious threat to the poultry industry.However,the live attenuated IBDV vaccine can potentially revert to a virulent strain.Therefore,it is a necessary to develop safe and effective IB-DV-associated vaccines.The construction of a recombinant Marek's disease(MD)vaccine strain,CVI988,expressing the IBDV VP2 protein,can protect against disease induced by both IBDV and Marek's disease virus(MDV).Here,the IBDV-VP2 gene was integrated into the UL55 locus of CVI988 by bacterial artificial chromosome(BAC)technique,resulting in the recombinant virus CVI988 BAC-VP2.The recombinant virus was characterized by PCR,IFA and subsequently the bi-ological properties of the recombinant virus were investigated.The results showed that the recom-binant virus CVI988 BAC-VP2 was successfully rescued.The VP2 protein stably expressed in chick-en embryo fibroblasts(CEF).The growth kinetics and plague size assays showed that there was comparable replication ability between recombinant virus and parental virus.This study provides the basis for the development of a low-cost vaccine against both IBDV and MDV infections.

To rapidly and accurately manipulate genome such as gene deletion, insertion and site mutation, the whole genome of a very virulent strain Md5 of Marek's disease virus (MDV) was inserted into bacterial artificial chromosome (BAC) through homogeneous recombination. The recombinant DNA was electroporated into DH10B competent cells and identified by PCR and restriction fragment length polymorphism analysis. An infectious clone of Md5BAC was obtained following transfection into chicken embryo fibroblast (CEF) cells. Furthermore, a lorf10 deletion mutant was constructed by two step Red-mediated homologous recombination. To confirm the specific role of gene deletion, the lorf10 was reinserted into the original site of MDV genome to make a revertant strain. All the constructs were rescued by transfection into CEF cells, respectively. The successful packaging of recombinant viruses was confirmed by indirect immunofluorescence assay. The results of growth kinetics assay and plaques area measurement showed that the lorf10 is dispensable for MDV propagation in vitro. Overall, this study successfully constructed an infectious BAC clone of MDV and demonstrated its application in genome manipulation; the knowledge gained from our study could be further applied to other hepesviruses.
Animals ; Chick Embryo ; Chickens ; Chromosomes, Artificial, Bacterial ; DNA, Recombinant ; Herpesvirus 2, Gallid/genetics* ; Marek Disease

Ubiquitination, an essential post-transcriptional modification (PTM), plays a vital role in nearly every biological process, including development and growth. Despite its functions in plant reproductive development, its targets in rice panicles remain unclear. In this study, we used proteome-wide profiling of lysine ubiquitination in rice (O. sativa ssp. indica) young panicles. We created the largest ubiquitinome dataset in rice to date, identifying 1638 lysine ubiquitination sites on 916 unique proteins. We detected three conserved ubiquitination motifs, noting that acidic glutamic acid (E) and aspartic acid (D) were most frequently present around ubiquitinated lysine. Enrichment analysis of Gene Ontology (GO) annotations and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways of these ubiquitinated proteins revealed that ubiquitination plays an important role in fundamental cellular processes in rice young panicles. Interestingly, enrichment analysis of protein domains indicated that ubiquitination was enriched on a variety of receptor-like kinases and cytoplasmic tyrosine and serine-threonine kinases. Furthermore, we analyzed the crosstalk between ubiquitination, acetylation, and succinylation, and constructed a potential protein interaction network within our rice ubiquitinome. Moreover, we identified ubiquitinated proteins related to pollen and grain development, indicating that ubiquitination may play a critical role in the physiological functions in young panicles. Taken together, we reported the most comprehensive lysine ubiquitinome in rice so far, and used it to reveal the functional role of lysine ubiquitination in rice young panicles.
Acetylation ; Lysine/metabolism* ; Oryza/metabolism* ; Plant Proteins/metabolism* ; Protein Interaction Maps ; Protein Processing, Post-Translational ; Proteome/metabolism* ; Ubiquitin/metabolism* ; Ubiquitination