Expression of sodium pump activities in BALB/c 3T3 cells transfected with cDNA encoding α3‐subunits of rat brain Na+,K+‐ATPase
Expression of sodium pump activities in BALB/c 3T3 cells transfected with cDNA encoding α3‐subunits of rat brain Na+,K+‐ATPase
复制标题
转染大鼠脑 Na+,K+-ATPase α3 亚基 cDNA 的 BALB/c 3T3 细胞中钠泵活性的表达
DOI:
10.1016/0014-5793(88)80218-7
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发表时间:
1988
期刊:
影响因子:
3.5
通讯作者:
M. Nakao
中科院分区:
文献类型:
--
作者:
Y. Hara;Akira Nikamoto;T. Kojima;A. Matsumoto;M. Nakao
The cDNAs encoding α3‐subunits of rat brain Na+,K+‐ATPase and the neomycin resistance gene were incorporated into BALB/c 3T3 cells by the co‐transfection method. Stably transformed cells were selected with 300 μg/ml of neomycin (G‐418) for 6 weeks. Northern blot analysis using the 3′‐non‐translated region of the cDNA as a probe revealed that the α3mRNA appeared in transfected cells. Na+,K+‐ATPase activity of the transfected cells was twice that of wild‐type cells. Regarding ouabain sensitivity, the Na+,K+‐ATPase showed twoKivalues for ouabain (8 × 10−8and 4.5 × 10−5M) in transfected cells while wild‐type cells displayed only the higher value. Ouabain sensitivity of Rb+uptake also demonstrated two Kivalues in the transfected cells (8 × 10−8and 4.5 × 10−5M) and aKiin wild‐type cells of 4 × 10−5M. It is concluded that α3is a highly ouabain‐sensitive catalytic subunit of Na+,K+‐ATPase. It is also suggested that ouabain sensitivity is exclusively determined by the properties of the α‐subunit rather than the β‐subunit. This is the first report on the catalytic charateristics of the α3isoform of Na+,K+‐ATPase.
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影响因子:
5.3
作者:
Okayama,H;Berg,P
通讯作者:
Berg,P
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Takeyasu,K;Tamkun,MM;Siegel,NR;Fambrough,DM
通讯作者:
Fambrough,DM
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Emanuel,JR;Schulz,J;Zhou,XM;Kent,RB;Housman,D;Cantley,L;Levenson,R
通讯作者:
Levenson,R
影响因子:
2.9
作者:
SHULL, GE;GREEB, J;LINGREL, JB
通讯作者:
LINGREL, JB