Ornithine transcarbamylase from Neurospora crassa: purification and properties.
Ornithine transcarbamylase from Neurospora crassa: purification and properties.
复制标题
来自粗糙脉孢菌的鸟氨酸转氨甲酰酶:纯化和特性。
DOI:
10.1016/0003-9861(85)90824-0
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发表时间:
1985
影响因子:
3.9
通讯作者:
Clarke,S
中科院分区:
文献类型:
--
作者:
Bates,M;Weiss,RL;Clarke,S
Ornithine transcarbamylase catalyzes the synthesis of citrulline from carbamyl phosphate and ornithine. This enzyme is involved in the biosynthesis of arginine in many organisms and participates in the urea cycle of mammals. The biosynthetic ornithine transcarbamylase has been purified from the filamentous fungus,Neurospora crassa. It was found to be a homotrimer with an apparent subunit molecular weight of 37,000 and a native molecular weight of about 110,000. Its catalytic activity has a pH optimum of 9.5 andKm's of about 5 and 2.5 mmfor the substrates, ornithine and carbamyl phosphate, respectively, at pH 9.5. TheKm's and pH optimum are much higher than those of previously characterized enzymes from bacteria, other fungi, and mammals. These unusual kinetic properties may be of significance with regard to the regulation of ornithine transcarbamylase in this organism, especially in the avoidance of a futile ornithine cycle. Polyclonal antibodies were raised against the purified enzyme. These antibodies and antibody raised against purified rat liver ornithine transcarbamylase were used to examine the structural similarities of the enzyme from a number of organisms. Cross-reactivity was observed only for mitochondrial ornithine transcarbamylases of related organisms.
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影响因子:
2.9
作者:
N. Hoogenraad;T. M. Sutherland;G. Howlett
通讯作者:
G. Howlett
影响因子:
11.1
作者:
R. Davis
通讯作者:
R. Davis
影响因子:
2.9
作者:
P. J. Snodgrass
通讯作者:
P. J. Snodgrass
DOI:
10.1016/0006-291x(76)90769-5
发表时间:
1976-01-01
影响因子:
3.1
作者:
CLARKE, S
通讯作者:
CLARKE, S
DOI:
10.1016/s0021-9258(17)42967-x
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Edward EisensteinS;J. C. Osborne;Irwin M. Chaikeny;P. Hensley
通讯作者:
P. Hensley