Abstract：
:The reaction mechanism of selenocystine beta-lyase has been studied and it was found that elemental selenium is released enzymatically from selenocysteine, and reduced to H2Se nonenzymatically with dithiothreitol or some other reductants that are added to prepare selenocysteine from selenocystine in the anaerobic reaction system. 1H and 13C NMR spectra of L-alanine formed in 2H2O have shown that an equimolar amount of [beta-2H1]- and [beta-2H2]alanines are produced. The deuterium isotope effect at the alpha position was observed; kH/kD = 2.4. These results indicated that the alpha hydrogen of selenocysteine was removed by a base at the active site, and was incorporated into the alpha position of alanine, a product, without exchange of a solvent deuterium. When the enzyme was incubated with L-selenocysteine in the absence of added pyridoxal 5'-phosphate, the activity decreased with prolonged incubation time. However, the activity was recovered by addition of 5'-phosphate. The spectrophotometric study showed that the inactivated enzyme was the apo form. The apoenzyme was activated by a combination of pyridoxamine 5'-phosphate and various alpha-keto acids such as alpha-ketoglutarate and pyruvate. Thus, the enzyme is inactivated through transamination between selenocysteine and the bound pyridoxal 5'-phosphate to produce pyridoxamine 5'-phosphate and a keto acid derived from selenocysteine. The pyridoxal enzyme, an active form, is regenerated by addition of alpha-keto acids. This regulatory mechanism is analogous to those of aspartate beta-decarboxylase [EC 4.1.1.12], arginine racemase [EC 5.1.1.9], and kynureninase [EC 3.7.1.3] [K. Soda and K. Tanizawa (1979) Adv. Enzymol. 49, 1].
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Esaki N,Karai N,Nakamura T,Tanaka H,Soda Kdoi
10.1016/0003-9861(85)90182-1subject
Has Abstractpub_date
1985-05-01 00:00:00pages
418-23issue
2eissn
0003-9861issn
1096-0384pii
0003-9861(85)90182-1journal_volume
238pub_type
杂志文章abstract：:Some properties and subcellular localization of adenosine diphosphatase (ADPase) activity from rat heart have been investigated. The pH optimum was 7.4, maximal activity was found with 5 mM MgCl2, and the apparent Km was 20 microM. ADPase activity was strongly inhibited by NaF and AppNHp, and to a lesser extent by AMP...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(84)90615-5
更新日期：1984-08-15 00:00:00
abstract：:[3H]Diazonamide A ([3H]DZA), prepared from the natural product isolated from Diazona angulata, bound to tubulin in larger aberrant assembly products (>500 kDa by sizing HPLC) but not to the αβ-tubulin heterodimer. The binding reaction was rapid, but stoichiometry was low. Stoichiometry was enhanced up to 8-fold by pre...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2019.108217
更新日期：2020-02-15 00:00:00
abstract：:Protoporphyrin IX inhibits citrulline formation by all three nitric oxide synthase isoforms in a manner reversible by dilution. Zinc protoporphyrin IX, by contrast, produces a time- and concentration-dependent inactivation of all three nitric oxide synthase isoforms, not reversible by dilution. The inhibition of citru...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1996.0360
更新日期：1996-09-01 00:00:00
abstract：:Glucocorticoids will enhance the growth of cultured human skin fibroblasts in serum-containing medium. In serum-free cultures hydrocortisone (5 X 10(-6) M) will enhance insulin stimulation of sugar transport and DNA synthesis (as measured by thymidine incorporation into trichloroacetic acid-precipitable material). The...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(83)90319-3
更新日期：1983-10-15 00:00:00
abstract：:A numerical method was applied to a system of differential rate equations describing the monomer-dimer-inhibitor (M-D-I) interaction involving human immunodeficiency virus type 1 protease and a peptidomimetic, competitive inhibitor. Two pairs of progress curves were obtained, one involving the M-D interaction and the ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1996.0179
更新日期：1996-04-15 00:00:00
abstract：:To elucidate the physiological significance of ketone bodies on insulin and glucagon secretion, the direct effects of beta-hydroxybutyrate (BOHB) and acetoacetate (AcAc) infusion on insulin and glucagon release from perfused rat pancreas were investigated. The BOHB or AcAc was administered at concentrations of 10, 1, ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(87)90552-2
更新日期：1987-08-15 00:00:00
abstract：:Stem cells maintain their self-renewal and multipotency capacities through a self-organizing network of transcription factors and intracellular pathways activated by extracellular signaling from the microenvironment or "niche" in which they reside in vivo. In the adult mammalian brain new neurons continue to be genera...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章,评审
doi：10.1016/j.abb.2012.10.001
更新日期：2013-06-01 00:00:00
abstract：:The conformational behavior of receptor-bound acetylcholine (ACh) was investigated by molecular dynamics simulations. Based on the great similarity among muscarinic receptors, the study was focused on the human M(1), M(2), and M(5) receptors as previously modeled by us. The results showed that receptor-bound ACh was n...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2007.04.022
更新日期：2007-08-01 00:00:00
abstract：:This report describes the isolation, sequencing, and functional analysis of the sodA gene, encoding Mn-superoxide dismutase, from Streptococcus thermophilus AO54. The gene was found to encode a 201 amino acid polypeptide with 88 and 83% identity to SodA from Streptococcus mutans and Streptococcus agalacticae, respecti...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2003.09.007
更新日期：2003-12-01 00:00:00
abstract：:The rotating frame nuclear magnetic resonance relaxation rate R(1rho) in the blood and cell lysate was studied at 4.7T to provide reference values for in vivo modeling and to address the mechanisms contributing to net relaxation. A strong dependence on oxygenation, hematocrit, and spin lock field strength B(1) (0.2-1....
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/s0003-9861(02)00286-2
更新日期：2002-09-01 00:00:00
abstract：:Putidaredoxin reductase (PdR), an FAD-containing protein, mediates the transfer of electrons from NADH to putidaredoxin in the cytochrome P-450cam-dependent oxidation of camphor. Using stopped-flow spectrophotometry, reduction of putidaredoxin reductase by NADH (70 microM) at 4 degrees C appeared to be a pseudo-first-...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(88)90233-0
更新日期：1988-10-01 00:00:00
abstract：:A gold(III) compound [Au(C^N^C)(IMe)]CF(3)SO(3) (Gold III) has been reported to have anticancer properties as it is able to reduce topoisomerase IB activity in vitro and suppress tumor growth in nude mice model. Here we have investigated the mechanism of inhibition of human topoisomerase IB activity by this compound, ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2011.10.008
更新日期：2011-12-15 00:00:00
abstract：:Thymidylate synthase (TS) is an essential enzyme that must be expressed in all proliferating cells. The mouse TS promoter lacks a TATA box and an initiator element and initiates transcription over a broad region in cultured fibroblasts. The goal of this study was to determine if expression of the TS gene in a variety ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1999.1523
更新日期：1999-12-15 00:00:00
abstract：:Endothelial senescence is the main risk factor that contributes to vascular dysfunction and the progression of vascular disease. Carbon monoxide (CO) plays an important role in preventing vascular dysfunction and in maintaining vascular physiology or homeostasis. The application of exogenous CO has been shown to confe...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2019.108185
更新日期：2019-11-30 00:00:00
abstract：:Orotate phosphoribosyltranferase (OPRTase) catalyzes the formation of orotidine 5'-monophosphate from the nitrogenous base orotate and alpha-D-5-phosphoribosyl-1-pyrophosphate (PRPP). While it is known that Mg2+ is necessary for catalysis, the mechanism of activation of the phosphoribosyl transfer by Mg2+ remains uncl...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1993.1290
更新日期：1993-06-01 00:00:00
abstract：:Angiotensin II (Ang II) plays an important role in inflammatory process. Acute lung injury (ALI), an inflammatory disorder of the lung, is commonly associated with endotoxemia; however, the mechanism that endotoxin (lipopolysaccharide, LPS) induces the inflammatory response in ALI is not well defined. Here, we showed,...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2008.09.019
更新日期：2009-01-01 00:00:00
abstract：:Inactivation of the von Hippel-Lindau (VHL) tumor suppressor is associated with renal carcinoma, hemangioblastoma and pheochromocytoma. The VHL protein is a component of a ubiquitin ligase complex that ubiquitinates and degrades hypoxia inducible factor-α (HIF-α). Degradation of HIF-α by VHL is proposed to suppress tu...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2011.12.023
更新日期：2012-02-15 00:00:00
abstract：:A new strategy for the functional reconstitution of membrane proteins is described. This approach introduces a new class of protein stabilizing agents--osmolytes--whose presence at high concentration (10-20%) during detergent solubilization prevents the inactivations that normally occur when proteins are extracted fro...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(89)90080-5
更新日期：1989-02-15 00:00:00
abstract：:Non-enveloped viruses require membrane-penetrating peptides for gaining entry inside the cytoplasm of host cells during the early stages of infection. Although several such peptides have been identified as essential components for non-enveloped virus entry, the molecular mechanism of membrane destabilization by these ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2019.108188
更新日期：2019-12-15 00:00:00
abstract：:Oxidation of [2,3-14C]succinate carbons in the mitochondrial Krebs cycle was used as a probe to investigate the effects of insulin, epinephrine, glucagon, and 2,4-dinitrophenol (2,4-DNP) on isolated rat hepatocytes. Epinephrine, glucagon, and 2,4-DNP had a far greater stimulatory effect on 14CO2 formation from [2,3-14...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(91)90382-s
更新日期：1991-05-15 00:00:00
abstract：:In spite of the abundance of antifungal therapies, 75% of women in the world suffer from the second most common cause of vaginal infection named vulvovaginal candidiasis. This complication is characterized with overgrowth of Candida albicans. The low efficacy and side effects of current antifungal therapies have convi...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2021.108772
更新日期：2021-01-22 00:00:00
abstract：:Immunological cross-reactivities between isolated subunits of the scorpion Androctonus australis (Aa) and of the horseshoe crab Limulus polyphemus (Lp) hemocyanins were studied using subunit-specific antibodies prepared through immunoadsorption to pure immobilized subunits. Rocket immunoelectrophoreses of the various ...
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：:The murine macrophage (M phi) cell line, P388D1, was employed as a source of M phi phospholipases in order to characterize the enzymatic properties and subcellular localization of these enzymes because of their importance for prostaglandin biosynthesis. Phospholipase activity was assessed with dipalmitoylphosphatidylc...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(85)90162-6
更新日期：1985-04-01 00:00:00
abstract：:Human lactase-phlorizin hydrolase [EC 3.2.1.23-3.2.1.62] is a disaccharidase located in the microvillus membrane of small intestinal epithelial cells. The enzyme is synthesized as a precursor protein in the endoplasmic reticulum and in addition to being glycosylated is subsequently proteolytically processed to the mat...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1995.9952
更新日期：1995-11-10 00:00:00
abstract：:Recent studies have shown that the light-dark mediated regulation of the leaf photosynthetic enzyme pyruvate, Pi dikinase results from interconversion between an active nonphosphorylated form of the enzyme and an inactive form phosphorylated on a threonine residue. These phosphorylation and dephosphorylation reactions...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章,评审
doi：10.1016/0003-9861(86)90219-5
更新日期：1986-03-01 00:00:00
abstract：:We analyzed the effect of a natural osmolyte, trimethylamine N-oxide (TMAO), on structural properties and conformational stabilities of several proteins under macromolecular crowding conditions by a set of biophysical techniques. We also used the solvent interaction analysis method to look at the peculiarities of the ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2015.02.021
更新日期：2015-03-15 00:00:00
abstract：:Subcutaneous implantation of demineralized bone matrix in rats induces migration of host cells into the site and results in the sequential development of cartilage and bone. The biosynthesis and metabolic fate of proteoglycans in the plaques at the bone matrix implantation site were investigated by [35S]sulfate labeli...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(86)90551-5
更新日期：1986-05-15 00:00:00
abstract：:The common notion in the protein world holds that proteins are synthesized as a linear polypeptide chain, followed by folding into a unique, functional 3D-structure. As outlined in many articles of this volume, this is in fact the case for a great proportion of the proteome. Many proteins and protein domains, however,...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章,评审
doi：10.1016/j.abb.2012.09.010
更新日期：2013-03-01 00:00:00
abstract：:Evidence for the formation of a positional isomer of leukotriene (LT) C3 (8,9-LTC3) from dihomo-gamma-linolenic acid has been published (Hammarström, S. J. Biol. Chem. 256, 7712-7714, 1981). This report describes the conversion of dihomo-gamma-linolenic acid to a postulated intermediate in former reaction, 8,9-LTA3, b...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(90)90483-f
更新日期：1990-06-01 00:00:00
abstract：:A large portion of mitochondrial asparagine (Asn) is degraded by asparagine amino-transferase to produce alpha-ketosuccinamate (alpha KSA), which is then hydrolized by omega-amidase to produce oxaloacetate (OAA) and ammonia. This is in contrast to the catabolism in the cytosol, where the main catabolic route for Asn o...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(89)90593-6
更新日期：1989-01-01 00:00:00
