Protein Domain : Arterivirus nucleocapsid IPR002484

Type	Family
Description	Arterivirus are ssRNA positive-strand viruses with no DNA stage in their replication cycle. This family contains the viral nucleocapsid protein, which encapsidates the viral ssRNA.Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative agent of both severe and persistent respiratory disease and reproductive failure in pigs worldwide. The PRRSV virion contains a core made of the 123 amino acid nucleocapsid (N or VP1) protein, a product of the ORF7 gene. The crystal structure of the capsid-forming domain of the nucleocapsid protein has been determined to 2.6 A resolution. The protein exists as a tight dimer forming a four-stranded beta sheet floor superposed by two long alpha helices and flanked by two N- and two C-terminal alpha helices. The structure represents a new class of viral capsid-forming domains, distinctly different from those of other known enveloped viruses, but reminiscent of the coat protein of bacteriophage MS2 [ ].
Short Name	Arte_nucleocap