Abstract:
:Fowl adenovirus serotype 4 (FAdV-4) is the causative agent of hydropericardium syndrome (HPS), a highly pathogenic disease in poultry. In the present study, hexon, penton base, and fiber-2 genes encoding major capsid proteins were analyzed in four FAdV-4 isolates from HPS-affected chickens in Korea. Nucleotide sequences of the entire hexon (2811 bases), penton base (1578 bases), and fiber-2 (1425 bases) genes from the Korean isolates were 97.5-99.3, 99.1-99.7, and 95.5-99.0 % identical, respectively, to those of foreign FAdV-4 isolates. In the N-terminal tail region of fiber-2, the KRP motif predicted to be the nuclear localization signal was identified in the Korean isolates, whereas KRP/A was detected in other isolates. The VYPF motif in fiber-2, which is known to interact with the penton base, was present in the same region of all FAdV-4 isolates that were compared. Amino acid variations in fiber-2 for HPS and non-HPS isolates revealed that D219 and T300 were conserved among ten HPS isolates from five countries, including Korea. T380 in fiber-2, previously found in HPS isolates, corresponded to A380 in the Korean isolates, indicating that T380 is not relevant for increased virulence. Phylogenetic analysis showed that the four Korean FAdV-4 isolates were more related to MX-SHP95, a Mexican FAdV-4 isolate of HPS origin, than to FAdV-4 isolates of Indian and Chinese origin, suggesting that the genetic relationship among FAdV-4 isolates is independent of geographic distribution. The molecular features of these genes will provide valuable information for vaccine development against HPS in the future.
journal_name
Virus Genesjournal_title
Virus genesauthors
Park HS,Lim IS,Kim SK,Kim TK,Park CK,Yeo SGdoi
10.1007/s11262-016-1393-zsubject
Has Abstractpub_date
2017-02-01 00:00:00pages
111-116issue
1eissn
0920-8569issn
1572-994Xpii
10.1007/s11262-016-1393-zjournal_volume
53pub_type
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