Abstract:
:Cytochrome P450 (P450) 2D6 is the classic human liver debrisoquine 4-hydroxylase, the first human P450 for which genetic polymorphism was clearly demonstrated. We prepared 11 different constructs of P450 2D6, with modification at the N-terminus, for expression in Escherichia coli with the vector pCW. These varied considerably in levels of expression of apo- and holoprotein, with the best yield being obtained in a system in which much of the N-terminal hydrophobic segment was removed. Production of holoprotein was highly dependent upon the addition of delta-aminolevulinic acid and FeCl3 to cultures, even though heme production should not be limiting in this system. The expressed protein was not tightly bound to the "heavier" membrane fraction but did not appear to behave as a soluble protein either. A purification strategy was developed involving fractional centrifugation, Triton X-114 phase separation, and flavodoxin affinity chromatography, which led to recovery of apparently electrophoretically homogeneous protein in good yield. Purified P450 2D6 had the expected N-terminal amino acid sequence and catalytic activities toward debrisoquine (4-hydroxylation) and bufuralol (1'-hydroxylation). The availability of a ready source of the recombinant protein should facilitate physical as well as functional studies and antibody production for other uses.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Gillam EM,Guo Z,Martin MV,Jenkins CM,Guengerich FPdoi
10.1006/abbi.1995.1329subject
Has Abstractpub_date
1995-06-01 00:00:00pages
540-50issue
2eissn
0003-9861issn
1096-0384pii
S000398618571329Xjournal_volume
319pub_type
杂志文章abstract::Fructose 2,6-bisphosphate inhibited all three fructose-1,6-bisphosphatases from the liver, intestine, and muscle of the mouse. The sensitivity of the liver enzyme to the inhibitor was significantly diminished when Mg2+ was replaced by Mn2+ as the activating cation. Inhibition of the liver enzyme by fructose 2,6-bispho...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90292-8
更新日期:1983-10-01 00:00:00
abstract::The effect of a protein matrix on the processing of glycoprotein glycans by Golgi enzymes from plant seedlings has been determined with an artificial glycoprotein system, comparing the processing rates of glycan-(biotinyl)Asn (or glycan-(biotinamidohexanoyl)Asn) substrates either free or bound to avidin. An analysis o...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90020-j
更新日期:1991-04-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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abstract::A new fluorescent ATP analog, adenosine-5'-triphosphoro-gamma-1-(5-sulfonic acid)naphthyl ethylamidate (gamma-1,5-EDANS)ATP, containing the fluorophore N-(aminoethyl)-5-naphthylamine-1-sulfonic acid attached via a gamma-phosphoamidate bond was synthesized in good yield. It has absorption maxima at 255 and 344 nm and a...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90311-5
更新日期:1986-05-01 00:00:00
abstract::We have developed derivatives of mouse embryonic fibroblasts (10T1/2) and Chinese hamster ovary (AS52) cells that stably express high levels of murine prostaglandin synthase-1 or -2 (PGHS-1 or -2). The cDNAs were transferred using retroviral vectors and the resulting G418-resistant clones were analyzed for prostagland...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0257
更新日期:1996-06-15 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2011.03.004
更新日期:2011-05-15 00:00:00
abstract::During the metabolism of 1,2-dimethylhydrazine (a colon carcinogen) in rats, methyl radicals (.CH3) are produced. To gain an insight into the nature of .CH3 interactions with biomolecules in vivo, we conducted in vitro studies using RNA as a model compound. RNA was incubated in a system where .CH3 was generated from t...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1497
更新日期:1993-10-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2007-12-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2010.07.007
更新日期:2010-12-01 00:00:00
abstract::Peroxisomes contain oxidases that produce H(2)O(2), which can result in protein oxidation. To test the vulnerability of peroxisomal proteins to oxidation in vivo the organelles were isolated from castor bean endosperm incubated with H(2)O(2). When peroxisomes were exposed to H(2)O(2)in vivo, the peroxisomal proteins e...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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更新日期:2009-11-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90607-7
更新日期:1986-02-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90116-0
更新日期:1987-05-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90537-9
更新日期:1990-07-01 00:00:00
abstract::Butyric acid produces multiple effects on mammalian cells in culture, including alterations in morphology, depression of growth rate, increased histone acetylation, and modified production of various proteins and enzymes. The latter effect is exemplified by the induction in HeLa cells of the glycoprotein hormone alpha...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(84)90605-2
更新日期:1984-08-15 00:00:00
abstract::The mammalian aldehyde dehydrogenase-3 gene (ALDH3) exhibits several aspects of tissue-specific expression. Certain normal tissues, such as the cornea, constitutively express ALDH3 at very high levels. Other tissues, such as normal liver, do not express ALDH3. In liver, ALDH3 is inducible by polycyclic aromatic hydroc...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1998.0989
更新日期:1999-01-15 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2004.02.021
更新日期:2004-04-15 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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更新日期:1999-03-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1179
更新日期:1994-05-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90623-9
更新日期:1983-06-01 00:00:00
abstract::Modulation of CYP3A1 and CYP3A2 mRNA expression by dexamethasone and by phenobarbital has been studied in immature (21-day-old) and adult (90-day-old) rat liver. Positive modulation of these forms by both agents markedly declines with the age of the animals. However, CYP3A2 mRNA, although physiologically extinguished ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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更新日期:1992-11-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.2001.2451
更新日期:2001-08-15 00:00:00
abstract::Mitochondrial metabolism depends on movement of hydrophilic metabolites through the mitochondrial outer membrane via the voltage-dependent anion channel (VDAC). Here we assessed VDAC permeability of intracellular mitochondria in cultured hepatocytes after plasma membrane permeabilization with 8 microM digitonin. Block...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2008.10.036
更新日期:2009-01-15 00:00:00
abstract::Flavopiridol has been shown to induce cell cycle arrest and apoptosis in various tumor cells in vitro and in vivo. Using immobilized flavopiridol, we identified glycogen phosphorylases (GP) from liver and brain as flavopiridol binding proteins from HeLa cell extract. Purified rabbit muscle GP also bound to the flavopi...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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更新日期:2001-02-15 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1348
更新日期:1993-07-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0127
更新日期:1996-03-15 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1997.0193
更新日期:1997-08-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90346-z
更新日期:1990-08-01 00:00:00
abstract::Several 2-halo-acyl-CoA derivatives have been synthesized to examine the interaction of these potential inhibitors of mitochondrial beta-oxidation with the purified medium chain acyl-CoA dehydrogenase from pig kidney. Racemic 2-bromo-, 2-chloro-, and 2-fluoro-octanoyl-CoA thioesters show 6.6, 33, and 3.5% of the activ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1184
更新日期:1993-04-01 00:00:00