title: Cloning and nucleotide analysis of the vp2 gene of a very virulent infectious bursal disease virus isolate from Iran.
abstract: An Iranian field isolate (IR01) of Infectious bursal disease virus (IBDV) was characterized by sequence analysis of its VP2 gene and protein. Comparison of the obtained sequences with those of IBDV isolates from other countries revealed that IR01 was similar to very virulent IBDV (vvIBDV) strains with the identities at nucleotide and amino acid levels reaching 98.198.9% and 99.199.3%, respectively. On the other hand, it was less similar to non-vvIBDV strains; with nucleotide and amino acid identities of 95.295.7% and 96.097.3%, respectively. Out of nine unique nucleotide differences found between IR01 and some other serotype 1 strains only two resulted in amino acid substitutions (Ile296Val and Thr359Lys). In phylogenetic analysis, IR01 was closely related to Asian and European vvIBDV strains. Based on these results, IR01 obviously belongs to vvIBDV strains.
authors.affiliation: National Institute for Genetic Engineering and Biotechnology, Teheran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Shamsara
authors.forename: S A
authors.initials: SA
authors.lastname: Ghorashi
authors.forename: G
authors.initials: G
authors.lastname: Ahmadian
mesh_terms: D000595:Amino Acid Sequence; D019943:Amino Acid Substitution / Q000235:genetics; D000818:Animals; D018175:Birnaviridae Infections / Q000662:veterinary* / Q000821:virology; D002645:Chickens / Q000821:virology*; D003001:Cloning, Molecular; D005814:Genes, Viral; D007243:Infectious bursal disease virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification / Q000472:pathogenicity*; D007492:Iran; D017720:Molecular Epidemiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D011201:Poultry Diseases / Q000821:virology*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D015678:Viral Structural Proteins / Q000737:chemistry / Q000235:genetics*; D014774:Virulence
chemical_list: C082513:VP2 protein, infectious bursal disease virus; D015678:Viral Structural Proteins