Kinetic and thermodynamic characterization of adenylyl cyclase from Euglena gracilis.
Kinetic and thermodynamic characterization of adenylyl cyclase from Euglena gracilis.
复制标题
纤细眼虫腺苷酸环化酶的动力学和热力学特征。
DOI:
10.1016/s0003-9861(02)00235-7
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发表时间:
2002
影响因子:
3.9
通讯作者:
M. Eugenia Torres
中科院分区:
文献类型:
--
作者:
R. Jasso‐Chávez;A. Vega;M. El;R. Moreno;M. Eugenia Torres
Some kinetic and thermodynamic properties of the plasma membrane adenylyl cyclase (AC) from the protist Euglena gracilis were examined. The AC kinetics for Mg-ATP was hyperbolic with a Kmvalue of 0.33–0.43mM, whereas the inhibition exerted by 2′,5′-dideoxyadenosine was of the mixed type with a Kiof 80–147μM. The Vmvalue (0.9 or 1.8nmol(mg protein)−1min−1) changed, depending upon the carbon source in the growth medium (lactic acid or glutamate plus malate). Lactic acid membrane AC was slightly more thermolabile (from 28 to 40°C) and showed higher activation energy (range 15–25°C). With lactate, the total and saturated fatty acid percentage content in the plasma membrane was significantly greater than with glutamate plus malate, whereas the percentage content of polyunsaturated (n−3) fatty acids was lower. The data suggest that the fatty acid composition, as changed by the carbon source in the growth medium, may modulate the AC activity in Euglena.
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影响因子:
2.9
作者:
J. Tesmer;C. Dessauer;R. Sunahara;L. Murray;Roger A. Johnson;A. G. Gilman;S. Sprang
通讯作者:
J. Tesmer;C. Dessauer;R. Sunahara;L. Murray;Roger A. Johnson;A. G. Gilman;S. Sprang
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Northup,JK;Smigel,MD;Gilman,AG
通讯作者:
Gilman,AG
影响因子:
3.6
作者:
Wei-Jen Tang;James H. Hurley
通讯作者:
Wei-Jen Tang;James H. Hurley
DOI:
--
发表时间:
1994-04
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Cali;J. Zwaagstra;N. Mons;D. Cooper;J. Krupinski
通讯作者:
J. Cali;J. Zwaagstra;N. Mons;D. Cooper;J. Krupinski
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Johnson,RA;Shoshani,I
通讯作者:
Shoshani,I