Identification of mouse liver aldehyde dehydrogenases that catalyze the oxidation of retinaldehyde to retinoic acid.
Identification of mouse liver aldehyde dehydrogenases that catalyze the oxidation of retinaldehyde to retinoic acid.
复制标题
鉴定催化视黄醛氧化为视黄酸的小鼠肝醛脱氢酶。
DOI:
10.1016/0006-2952(91)90266-8
复制
发表时间:
1991
影响因子:
5.8
通讯作者:
Sladek,NE
中科院分区:
文献类型:
--
作者:
Lee,MO;Manthey,CL;Sladek,NE
NAD(P)-linked aldehyde dehydrogenases catalyze the oxidation of a wide variety of aldehydes. Thirteen of these enzymes have been identified in mouse tissues; eleven are found in the liver. Some are substrate-nonspecific; others are relatively substrate-specific. The present investigation sought to determine which of these enzymes are operative in catalyzing the oxidation of retinaldehyde to retinoic acid, a metabolite of vitamin A that promotes the differentiation of epithelial and other cells. Spectrophotometric and HPLC assays were used for this purpose. Enzyme-catalyzed oxidation of retinaldehyde (25 μM) was restricted to the cytosol (105,000g supernatant fraction) and occurred at a rate of 211 nmol/min/g liver; oxidation of acetaldehyde (4 mM) by this fraction proceeds about ten times faster. At least 90% of this activity was NAD dependent. Of the approximately 10% that was apparently NAD independent, two-thirds was inhibited by 1 mM pyridoxal, a known inhibitor of aldehyde oxidase. Of the six cytosolic aldehyde dehydrogenases, only two, viz. AHD-2 and AHD-7, catalyzed the oxidation of retinaldehyde to retinoic acid. An additional NAD-dependent enzyme, viz. xanthine oxidase (dehydrogenase form), also catalyzed the reaction. Catalysis by AHD-2 accounted for more than 90% of the total NAD-dependent activity.Kmvalues were 0.7, 0.6 and 0.9 μM, respectively, for the AHD-2-, AHD-7- and xanthine oxidase (dehydrogenase form)-catalyzed reaction. AHD-4, an aldehyde dehydrogenase found in the cytosol of mouse stomach epithelium and cornea, did not catalyze the reaction.
登录
查看更多内容
影响因子:
4.8
作者:
R. Deitrich;P. Bludeau;T. Stock;M. Roper
通讯作者:
M. Roper
影响因子:
5.8
作者:
R. Deitrich;P. Bludeau;M. Roper;J. Schmuck
通讯作者:
J. Schmuck
DOI:
10.1016/0006-291x(80)90572-0
发表时间:
1980
影响因子:
3.1
作者:
G. S. Kishore;R. Boutwell
通讯作者:
R. Boutwell
DOI:
10.1042/bj0850326
发表时间:
1962
期刊:
The Biochemical journal
影响因子:
--
作者:
Subramony Mahadevan;S. Murthy;J. Ganguly
通讯作者:
J. Ganguly
影响因子:
11.2
作者:
F. Kohn;G. J. Landkamer;C. Manthey;N. Ramsay;N. Sládek
通讯作者:
F. Kohn;G. J. Landkamer;C. Manthey;N. Ramsay;N. Sládek