The mechanisms involved in the construction of the icosahedral capsid of the African swine fever virus (ASFV) particle are not well understood at present. Capsid formation requires protein p72, the major capsid component, but other viral proteins are likely to play also a role in this process. We have examined the function of the ASFV structural protein pB438L, encoded by gene B438L, in virus m...

conclusions in this study, the optimized truncated orf2 protein was expressed in e. coli successfully and the highly purified protein was obtained, which can be a potential vaccine candidate and as an antigen in elisa to diagnose hev infections. results the subcloning was confirmed by pcr, restriction enzyme digestion, and dna sequencing of recombinant plasmid pet30a-orf2.2. the results obtaine...

Hepatitis C virus (HCV) p7 is a membrane-associated ion channel protein crucial for virus production. To analyze how p7 contributes to this process, we dissected HCV morphogenesis into sub-steps including recruitment of HCV core to lipid droplets (LD), virus capsid assembly, unloading of core protein from LDs and subsequent membrane envelopment of capsids. Interestingly, we observed accumulatio...

Protein synthesis is believed to be initiated with the amino acid methionine because the AUG translation initiation codon of mRNAs is recognized by the anticodon of initiator methionine transfer RNA. A group of positive-stranded RNA viruses of insects, however, lacks an AUG translation initiation codon for their capsid protein gene, which is located at the downstream part of the genome. The cap...

There are many examples of protein cages in nature, from the outer capsid shells viruses that protect their genetic material, to simple organelle-like structures bacteria house enzymes within interior. This Account serves introduce world a chemical audience, and highlight similarities concepts supramolecular chemistry, revealing how knowledge base chemistry can provide foundation for valuable i...

Although parvoviruses are found throughout the animal kingdom, only the human pathogenic B19 virus has so far been shown to possess a limited host range, with erythroid progenitor cells as the main target cells supporting B19 propagation. The underlying mechanism of such erythroid tropism is still unexplained. Synthesis of the NS1 nonstructural protein occurs in permissive and nonpermissive cel...

Two-dimensional crystals were obtained from purified P8, an outer capsid protein of rice dwarf phytoreovirus. A filtered image of the two-dimensional crystal, in combination with the results of biochemical analysis, revealed the unit formation of the capsid protein, a capsomere structure, which appeared to be an approximately equilateral triangle with sides of approximately 6 nm and which was c...

The capsids of herpesviruses, which comprise major and minor capsid proteins, have a common icosahedral structure with 162 capsomers. An electron microscopic study shows that Epstein-Barr virus (EBV) capsids in the nucleus are immunolabeled by anti-BDLF1 and anti-BORF1 antibodies, indicating that BDLF1 and BORF1 are the minor capsid proteins of EBV. Cross-linking and electrophoresis studies of ...

The distribution and morphology of mitochondria are dramatically affected during infection with rubella virus (RV). Expression of the capsid, in the absence of other viral proteins, was found to induce both perinuclear clustering of mitochondria and the formation of electron-dense intermitochondrial plaques, both hallmarks of RV-infected cells. We previously identified p32, a host cell mitochon...

This paper presents evidence that Thosea asigna virus (TaV) has a unique capsid expression strategy and is a member of the Nudaurelia beta-like genus of the Tetraviridae. Electron microscopy of TaV particles indicated a 38 nm, T = 4 icosahedral capsid similar in structure to that of Nudaurelia beta virus (NbetaV). TaV particles have a buoyant density of 1.296 g/cm3 in CsCl and consist of two ca...