title: Sequence and phylogenetic analysis of S1, S2, M, and N genes of infectious bronchitis virus isolates from Malaysia.
abstract: Two Malaysian infectious bronchitis virus isolates, MH5365/95 and V9/04 were characterized based on sequence and phylogenetic analyses of S1, S2, M, and N genes. Nucleotide sequence alignments revealed many point mutations, short deletions, and insertions in S1 region of both IBV isolates. Phylogenetic analysis of S1 gene and sequences analysis of M gene indicated that MH5365/95 and V9/04 belong to non-Massachusetts strain. However, both isolates share only 77% identity. Analysis based on S1 gene showed that MH5365/95 shared more than 87% identity to several Chinese strains. Meanwhile, V9/04 showed only 67-77% identity to all the previously studied IBV strains included in this study suggesting it is a variant of IBV isolate that is unique to Malaysia. Phylogenetic analysis suggests, although both isolates were isolated 10 years apart from different states in Malaysia, they shared a common origin. Analysis based on S2 and N genes indicated that both strains are highly related to each other, and there are fewer mutations which occurred in the respective genes.
authors.affiliation: Faculty of Veterinary Medicine, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
authors.forename: Zarirah M
authors.initials: ZM
authors.lastname: Zulperi
authors.forename: A R
authors.initials: AR
authors.lastname: Omar
authors.forename: S S
authors.initials: SS
authors.lastname: Arshad
mesh_terms: D016000:Cluster Analysis; D019143:Evolution, Molecular; D054643:INDEL Mutation; D001351:Infectious bronchitis virus / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D008296:Malaysia; D008969:Molecular Sequence Data; D010802:Phylogeny; D017354:Point Mutation; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D014764:Viral Proteins / Q000235:genetics*
chemical_list: D014764:Viral Proteins