양식 강도다리, Platichthys stellatus 및 넙치, Paralichthys olivaceus에서 분리한 marine birnavirus (MABV)의 phylogenetic 분석
Phylogenetic analysis of marine birnavirus (MABV) isolated from cultured starry flounder Platichthys stellatus and olive flounder Paralichthys olivaceus in Korea
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경북 울진 지역에서 채집된 양식 강도다리와 충남 태안 및 부산 지역 넙치 시료로부터 분리한 MABV에 대한 유전자 비교를 위해 VP2-NS-VP3 region (432 bp)을 phylogenetic 분석에 이용했다. Sequence 확인 결과 MABV (08-KU)는 일본 방어에서 최초 분리 보고된 YTAV와 98%의 nucleotide 유사성이 나타났으며, 이전 보고된 다른 여러 strain들과는 76%이상 유사한 것으로 확인되었다. 그리고 MABV (06-KP)와 MABV (08-KC)도 YTAV와 9798%의 높은 sequence 유사성을 보였다. 또한 다양한 MABV strain들과의 비교를 위해 충남태안 및 부산지역 넙치 시료에서 분리한 MABV (08-KC)와 MABV (06-KP)에 대한 phylogenetic 분석도 실시하였다. 그 결과 분석에 사용된 MABV (08-KU0, MABV (06-KP), MABV (08-KC)는 모두 일본 방어에서 분리된 MABV Y6와 동일한 genogroup Ⅶ에 포함 되었다.
Abstract
In this study, we have compared the genome of marine birnavirus (MABV) detected from starry flounder Platichthys stellatus and olive flounder Paralichthys olivaceus. A molecular analysis based on the nucleotide sequence (433 bases) of VP2-NS-VP3 region revealed that MABV (08-KU) from starry flounder showed 98% similarity with MABV Y6 isolated from Yellowtail Seriola quinqueradita in Japan (Accession no: AY283781) and with other aquabirnaviruses identify more than 76%. Comparison with MABV strains (06-KP, 08-KC) from olive flounder and MABV Y6 strain showed 97~98% sequence identities. Phylogenetic analysis was performed in order to examine the relationship among previously determined aquatic birnaviruses isolates showed that MABV and IPNV strains were classified into seven clusters. Three isolates from starry flounder and olive flounder in this study, belong to the genogroup Ⅶ including MABV Y6 strain and other aquabirnaviruses isolated from marine fish and molluscan shellfish in Japan. This report is the first description of a MABV from starry flounder in Korea.
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