Correlation of structural and functional thermal stability of the integral membrane protein Na,K-ATPase.
Correlation of structural and functional thermal stability of the integral membrane protein Na,K-ATPase.
复制标题
整合膜蛋白Na,K-ATP酶的结构和功能热稳定性的相关性。
DOI:
10.1016/j.bbamem.2011.06.009
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Miles AJ
中科院分区:
文献类型:
--
作者:
Miles AJ
The membrane-bound cation-transporting P-type Na,K-ATPase isolated from pig kidney membranes is much more resistant towards thermal inactivation than the almost identical membrane-bound Na,K-ATPase isolated from shark rectal gland membranes. The loss of enzymatic activity is correlated well with changes in protein structure as determined using synchrotron radiation circular dichroism (SRCD) spectroscopy. The enzymatic activity is lost at a 12°C higher temperature for pig enzyme than for shark enzyme, and the major changes in protein secondary structure also occur at Tm's that are ~10–15°C higher for the pig than for the shark enzyme. The temperature optimum for the rate of hydrolysis of ATP is about 42°C for shark and about 57°C for pig, both of which are close to the temperatures for onset of thermal unfolding. These results suggest that the active site region may be amongst the earliest parts of the structure to unfold. Detergent-solubilized Na,K-ATPases from the two sources show the similar differences in thermal stability as the membrane-bound species, but inactivation occurs at a lower temperature for both, and may reflect the stabilizing effect of a bilayer versus a micellar environment.
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影响因子:
3.1
作者:
A. S. Hansen;Kristian L Kraglund;N. Fedosova;M. Esmann
通讯作者:
M. Esmann
DOI:
10.1016/j.bbamem.2007.12.006
发表时间:
2008
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
E. Fodor;N. Fedosova;Csilla Ferencz;D. Marsh;T. Páli;M. Esmann
通讯作者:
M. Esmann
影响因子:
2.9
作者:
Cornelius, F;Turner, N;Christensen, HRZ
通讯作者:
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DOI:
--
发表时间:
1979
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
J. Skou;M. Esmann
通讯作者:
M. Esmann
影响因子:
4.8
作者:
R. Tupling;A. Gramolini;T. Duhamel;H. Kondo;M. Asahi;S. C. Tsuchiya;M. Borrelli;J. Lepock;K. Otsu;M. Hori;D. Maclennan;H. Green
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H. Green