Abstract:
:Cultured arterial smooth muscle cells have been found to contain an activatable neutral cholesteryl esterase (EC 3.1.1.13). This enzyme is similar to that previously described in adipose tissue, adrenal cortex, and aortic homogenates. Although both the lysosomal (acid) and cytoplasmic (neutral) cholesteryl esterases were activated two- to threefold by the addition of 100 microM dibutyryl cyclic AMP, only neutral cholesteryl esterase was responsive to 100 microM dibutyryl cyclic AMP, 10 mM MgATP, and 50 micrograms/ml exogenous protein kinase when added together. Protein kinase inhibitor (10 micrograms/ml) reversed the action of cyclic AMP-dependent protein kinase; deactivation of neutral cholesteryl esterase was also shown to occur with 50 micrograms/ml phosphoprotein phosphatase. In addition, 0.2 microM prostacyclin, 50 microM forskolin, and an agonist of the beta-adrenergic receptor, 5 microM isoproterenol, significantly stimulated intracellular cyclic AMP accumulation and activated cholesteryl esterase in arterial smooth muscle cells. The data indicate that neutral cholesteryl esterase in arterial smooth muscle cells can be modulated by a phosphorylation-dephosphorylation system involving the cyclic AMP-dependent protein kinase-phosphoprotein phosphatase. Regulation of cholesteryl esterase by this mechanism may affect lipid accumulation in these arterial cells.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Hajjar DPdoi
10.1016/0003-9861(86)90531-xsubject
Has Abstractpub_date
1986-05-15 00:00:00pages
49-56issue
1eissn
0003-9861issn
1096-0384pii
0003-9861(86)90531-Xjournal_volume
247pub_type
杂志文章abstract::Biosynthesis of thyroxine in the thyroid gland involves a reaction between two diiodotyrosyl residues within the same molecule of thyroglobulin, a large, thyroid-specific glycoprotein. This reaction, generally referred to as the coupling reaction, is catalyzed in the thyroid by the heme-containing glycoprotein enzyme,...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1474
更新日期:1994-11-15 00:00:00
abstract::The flavoprotein monoamine oxidase B (MAO B) from bovine liver, as isolated, has an unusual additional absorption band at 412 nm, which is similar to the absorption of its anionic flavin semiquinone form, (Fl.-), and other typical (Fl.-) flavoproteins. Denaturation of the enzyme results in the elimination of this anom...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1025
更新日期:1993-01-01 00:00:00
abstract::The nuclear receptor CAR (constitutive active receptor) mediates the induction of transcription of cytochrome P450 (CYP) genes by phenobarbital (PB) and PB-type inducers. A recent study using CAR-null mice has shown that CAR regulates not only the CYP genes but also other genes encoding various drug/steroid-metabolizi...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(02)00456-3
更新日期:2003-01-01 00:00:00
abstract::Proteins lacking prosthetic groups and/or cofactors are known to undergo electronic excitation transitions only upon exposure to UV-C (< 280 nm) and UV-B (280-320 nm), but not UV-A (320-400 nm) photons. Here, we report the discovery of a novel excitation that peaks at approximately 340 nm and yields visible violet-blu...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2004.05.007
更新日期:2004-08-15 00:00:00
abstract::Carotenoids possessing hydroxyl groups can be found in nature both as free xanthophylls and as carotenoid esters, i.e. acylated with fatty acids. A single carotenoid can be acylated with different fatty acids, resulting in a high number of possible structures of carotenoid esters. The analysis of carotenoid esters can...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2018.04.005
更新日期:2018-06-15 00:00:00
abstract::I had the fortune to be introduced to Helmut Sies during the mid 1980s, while working as a post-doctoral scientist at the University of California, Berkeley. At that time, Helmut was a frequent visitor of the Bruce Ames' laboratory and a leading authority in antioxidants and oxidative stress. His concepts, ideas and w...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2015.11.021
更新日期:2016-04-01 00:00:00
abstract::The combination of phorbol 12-myristate 13-acetate (PMA) and ionomycin produces a dramatic increase in the incorporation of [2-3H]mannose into Glc3Man9GlcNAc2-P-P-dolichol and glycoprotein, and the induction of RNA and DNA synthesis in murine splenic B lymphocytes (B cells). The kinetics of the induction processes and...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90036-7
更新日期:1988-11-15 00:00:00
abstract::A number of glycosphingolipids, including 10 gangliosides, not previously identified in human plasma have been characterized. The plasma contains 2 micrograms of lipid-bound sialic acid/ml plasma and 54% of the gangliosides are monosialo, 30% disialo, 10% trisialo, and 6% tetrasialo. Individual glycosphingolipids were...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(85)90179-1
更新日期:1985-05-01 00:00:00
abstract::Bidentate cobalt(III)tetraamine adenosine triphosphate [Co(NH3)4ATP] was investigated as an inhibitor of the beef heart mitochondrial F1-ATPase. The compound was found to have a mixed noncompetitive mechanism with a Ki of 0.4 mM and an alpha of 1.4 during ATP hydrolysis. Co(NH3)4ATP also noncompetitively inhibited ATP...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(85)90208-5
更新日期:1985-05-01 00:00:00
abstract::The mechanisms underlying the inhibition of bile acid-induced apoptosis by cyclic AMP (cAMP) were studied in 24-h-cultured rat hepatocytes. Taurolithocholate 3-sulfate (TLCS, 100 micromol/l) led to a sustained activation of mitogen activated protein (MAP) kinases (JNK, p38(MAPK), and ERKs), dephosphorylation of protei...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(03)00224-8
更新日期:2003-07-01 00:00:00
abstract::Caffeic acid O-methyltransferase (COMT) is one of a group of proteins present in alfalfa cell cultures which can be photoaffinity labeled with S-adenosyl-L-[methyl-3H]methionine. The enzyme was purified to homogeneity from elicitor-treated suspension cultures and shown to exist as an active monomer of subunit Mr 41,00...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90492-2
更新日期:1991-06-01 00:00:00
abstract::Serratia rubidaea (ATCC 27614) typifies a substantial number of enteric bacteria which, unlike Escherichia coli, possess a monofunctional species of chorismate mutase (denoted CM-F). CM-F coexists with two additional species of chorismate mutase, each of the latter being one catalytic domain of a bifunctional protein....
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90149-q
更新日期:1992-04-01 00:00:00
abstract::The cardiomyopathy produced by the widely used anticancer drug adriamycin (ADR) is believed to be related to the production of reaction oxygen species and consumption of reduced glutathione (GSH) during redox cycling of the drug. Protection by vitamin E against the toxicity of ADR was studied in a model of compromised...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90434-6
更新日期:1987-07-01 00:00:00
abstract::The paper reports a study on the reactions of grass pea (Lathyrus sativus) amine oxidase (GPAO) with several aliphatic diamines. The influence of the chain length and of unsaturations in the molecules was examined. Kinetic measurements confirmed that trans-, i.e., (E)-2-butene-1,4-diamine (TDABE) and cis-, i.e., (Z)-2...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.2000.2081
更新日期:2000-12-01 00:00:00
abstract::Intrinsically disordered proteins represent about one third of eukaryotic proteins. An additional third correspond to proteins containing folded domains as well as large intrinsically disordered regions (IDR). While IDRs may represent functionally autonomous domains, in some instances it has become clear that they pro...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2019.108161
更新日期:2019-11-30 00:00:00
abstract::Biochemical communication between the cytoplasmic and mitochondrial subsystems of the cell depends on solute carriers in the mitochondrial inner membrane that transport metabolites between the two compartments. We have expressed and purified a yeast mitochondrial carrier protein (Mtm1p, YGR257cp), originally identifie...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2015.01.021
更新日期:2015-02-15 00:00:00
abstract::Hitherto the lack of success in cloning the aryl hydrocarbon (Ah) receptor has severely hindered its analysis. The recent cloning of cDNAs for two subunits of the receptor should lead to a renaissance in research. Furthermore, the sequences of the two subunits, as deduced from their cDNA sequences, have shown that the...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1006/abbi.1993.1001
更新日期:1993-01-01 00:00:00
abstract::Concentrations of GDP, which are expected to bind to the catalytic site and inhibit the autophosphorylation of succinyl-CoA synthetase (SCS) when NTP is used as a substrate, were found to increase the level of phosphoenzyme formed. The ability of GDP to do so is dependent upon the presence of a protein distinct from S...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1997.0313
更新日期:1997-11-01 00:00:00
abstract::Functional activities of isolated atria from 4-week diabetic rats and their anoxic tolerance and recovery were compared to those of control rats. The present study showed a two-fold increase in maximum developed contraction force (CF), the rate of force development, and the rate of relaxation in isolated atria from di...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90479-i
更新日期:1990-05-15 00:00:00
abstract::Flavin-dependent monooxygenases catalyze a wide variety of redox reactions in important biological processes and are responsible for the synthesis of highly complex natural products. Although much has been learned about FMO chemistry in the last ~80 years of research, several aspects of the reactions catalyzed by thes...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2021.108765
更新日期:2021-01-16 00:00:00
abstract::Piratoxins (PrTX) I and III are phospholipases A2 (PLA2s) or PLA2 homologue myotoxins isolated from Bothrops pirajai snake venom, which also induce myonecrosis, bactericidal activity against Escherichia coli, disruption of artificial membranes, and edema. PrTX-III is a catalytically active hemolytic and anticoagulant ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.2000.2244
更新日期:2001-03-15 00:00:00
abstract::Three isoenzymes of UDP-glucuronyltransferase (UDPGT) have been separated and purified from liver microsomes of untreated female rats or female rats pretreated with 3-methylcholanthrene. The UDPGT isoenzymes were purified utilizing Chromatofocusing, column isoelectric focusing, and UDP-hexanolamine Sepharose 4B affini...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90368-5
更新日期:1983-11-01 00:00:00
abstract::MicroRNA-342-3p (miR-342) has been shown to act as a tumor-suppressor in different cancer types. However, the role and therapeutic implications of miR-342 via modulation of Cofilin 1 (CFL1) has not been studied in any type of cancer. Given the importance of Cofilin signalling in breast, this study was undertaken to ex...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2020.108385
更新日期:2020-07-15 00:00:00
abstract::We previously found that vitamin K3 (menadione, 2-methyl-1,4-naphthoquinone) inhibits the activity of human mitochondrial DNA polymerase (pol) γ. In this study, we focused on plumbagin (5-hydroxy-2-methyl-1,4-naphthoquinone), and chemically synthesized novel plumbagins conjugated with C2:0 to C22:6 fatty acids (5-O-ac...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2015.02.032
更新日期:2015-05-01 00:00:00
abstract::In the present study, the activity of Topoisomerase IIβ (TopoIIβ) is evaluated during peroxide induced double stranded DNA breaks (DSBs) repair in primary neurons. The results showed that the TopoIIβ levels were enhanced during recovery from peroxide mediated damage (PED) along with Ku70, PARP-1, pol beta, and WRN hel...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2011.10.001
更新日期:2011-12-15 00:00:00
abstract::Physicochemical properties and catalytic activity of cytochrome P4501A2 in the reconstituted system with Emulgen 913 were studied. The formation of cytochrome P4501A2 monomers was shown by gel filtration at an Emulgen concentration of 8 g/liter. The catalytic activity of the monomeric monooxygenase system was low. The...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1218
更新日期:1994-05-15 00:00:00
abstract::A new creatine analog, 1-carboxyethyl-2-iminoimidazolidine (homocyclocreatine), has been synthesized and compared with other synthetic analogs of creatine as a substrate for creatine kinase under both in vitro and in vivo conditions. Reactivity with rabbit muscle creatine kinase at 2 mM and pH 7.0 occurred in the orde...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90448-4
更新日期:1983-02-01 00:00:00
abstract::Vanadium salts such as vanadyl sulfate (VS), potent inhibitors of protein tyrosine phosphatases, have been shown to mimic, augment, and prolong insulin's action. However, the molecular mechanism of responses to these salts is not clear. In the present studies, we examined if VS-induced effects on insulin action are as...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2003.09.010
更新日期:2003-12-01 00:00:00
abstract::Synthetic peptides corresponding to the phosphorylation site in the myosin regulatory light chain from smooth muscle, Lys-Lys-Arg-Ala-Arg-Ala-Thr-Ser-Asn-Val-Phe-Ala ([Ala14,15]MLC(11-23] and containing a variety of hydroxyamino acid analogs at position 19, were tested as substrates for the smooth muscle myosin light ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90421-3
更新日期:1988-01-01 00:00:00
abstract::Protein synthesis and lipid peroxidation were evaluated in rat liver slices incubated in the presence of oxidants and protein synthesis inhibitors. Protein synthesis by rat liver slices was evaluated by [3H]leucine incorporation into the trichloroacetic acid (TCA)-insoluble material, and lipid peroxidation was evaluat...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(89)90010-6
更新日期:1989-04-01 00:00:00