Bioinformatics Analysis and Characteristics of UL21 Protein from Duck Virus Enteritis

The UL21 protein of duck virus enteritis is analyzed by means of some software and online tools. The physicochemical properties results showed that the DEV UL21 product is a stable protein which consists of 561 amino acids and contain 27 potential phosphorylation sites, 3 potential glycosylation sites at aa residues 2, 172, 522. Both the signal peptide and the transmembrance region are not found. The secondary structure results revealed that UL21 protein is composed of 44.56% Alpha helix (h), 13.55% extended strand (e) and 41.89% random coil (c), respectively. In addition, the protein subcellular localization mainly locates at cytoplasmic with 65.2%, nuclear with 17.4%. The phylogenetic tree and amino acid sequence comparison analysis revealed DEV UL21 protein is conserved and most closely related to Varicellovirus and Mardivirus. These results provided rational data to elucidate biological function and physiological features of the UL21 gene.