title: Molecular cloning, characterization, and expression of vacuolar-type-H⁺-ATPase B1 (VHAB1) gene in the gill of Anguilla marmorata.
abstract: We explored the molecular mechanism of the regulation of vacuolar-type-H+-ATPase B1 (VHAB1) in elvers in the response to salinity. The full-length cDNA of VHAB1 in Anguilla marmorata (designated as AmVHAB1), which was 1741 base pairs (bp) in length, was found to encompass a 1512-bp open reading frame encoding a polypeptide with 503 amino acids (55.9 kDa), an 83-bp 5'-untranslated region, and a 146-bp 3'-untranslated region. The mRNA and protein expression levels of AmVHAB1 in the gill were evaluated at different time points (0, 1, 3, 6, 12, 24, 48, 72, and 96 h, and 15 days) during the exposure to various salinity levels (0, 10, and 25‰). The results indicated that the expression levels of AmVHAB1 mRNA in the gill significantly increased and reached the highest level at 1 h exposure in the brackish water (BW, 10‰) group and at 6 h exposure in the seawater (SW, 25‰) group. The salinity level affected the relative expression level of AmVHAB1 mRNA in the gill, which was increased by approximately 44-fold in the SW group when compared with that in fresh water. Immunoblotting analysis showed that VHA expression was significantly higher in the BW and SW groups, with the highest expression level was detected at 96 h exposure. We found that the AmVHAB1 gene in elvers from A. marmorata plays an important role in the adaptation to seawater.
authors.forename: L
authors.initials: L
authors.lastname: Li
authors.forename: Y H
authors.initials: YH
authors.lastname: Jia
authors.forename: P
authors.initials: P
authors.lastname: Li
authors.affiliation: Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lian Yungang, China.
authors.forename: S W
authors.initials: SW
authors.lastname: Yin
authors.affiliation: Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lian Yungang, China.
authors.forename: G S
authors.initials: GS
authors.lastname: Zhang
authors.affiliation: Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lian Yungang, China.
authors.forename: X L
authors.initials: XL
authors.lastname: Wang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Wang
authors.forename: X J
authors.initials: XJ
authors.lastname: Wang
mesh_terms: D000595:Amino Acid Sequence; D000811:Anguilla / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D015971:Gene Expression Regulation, Enzymologic; D005880:Gills / Q000201:enzymology*; D015151:Immunoblotting; D008969:Molecular Sequence Data; D010802:Phylogeny; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D000068357:Saline Waters; D012623:Seawater; D013997:Time Factors; D025262:Vacuolar Proton-Translocating ATPases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism
chemical_list: D012333:RNA, Messenger; D025262:Vacuolar Proton-Translocating ATPases