Abstract:
:The SH groups of glutamine synthetase [EC 6.3.1.2] from Bacillus stearothermophilus were modified with 5, 5'-dithiobis(2-nitrobenzoic acid) in order to determine the number of SH groups in the molecule as well as the effect of the modification on the enzyme activity. Three SH groups per subunit were detected after complete denaturation of the enzyme with 6 M urea, one of which was essential for the enzyme activity in view of its reactivity with 5, 5'-dithiobis(2-nitrobenzoic acid) on addition of MgCl2 with loss of the activity. The CD spectra of the modified enzyme in the near ultraviolet region changed from that of the native enzyme, indicating that aromatic amino acid residues were affected by modification of the SH group. The fluorescence derived from tryptophanyl residue(s) was quenched depending on the extent of modification of the SH group, suggesting that the tryptophanyl residue(s) was located in the proximity of the SH group. The thermostability of the enzyme was remarkably decreased by modification of the SH group.
journal_name
J Biochemjournal_title
Journal of biochemistryauthors
Hachimori A,Takeda A,Nagaoka T,Suzuki H,Nosoh Y,Samejima Tdoi
10.1093/oxfordjournals.jbchem.a131021subject
Has Abstractpub_date
1975-12-01 00:00:00pages
1235-40issue
6eissn
0021-924Xissn
1756-2651journal_volume
78pub_type
杂志文章abstract::The three-dimensional structure of cytochrome c-553 isolated from sulfate-reducing bacterium, Desulfovibrio vulgaris Miyazaki F strain, has been determined by the multi-wavelength anomalous dispersion technique with use of synchrotron radiation. The result shows that bacterial S-class cytochromes c have a variety of f...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123267
更新日期:1990-11-01 00:00:00
abstract::Studies were performed in the rat liver to examine whether or not insulin as well as glucagon causes the induction of mitochondrial serine:pyruvate aminotransferase (SPTm) [EC 2.6.1.51] and if so, whether the mechanisms of induction are similar or different for the two hormones. Not only glucagon but also insulin indu...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122695
更新日期:1989-04-01 00:00:00
abstract::We found that transducing phages carrying the gal or bio regions of the Escherichia coli genome were formed during in vitro packaging of endogenous lambda DNA. Structural analysis of the transducing phage genomes indicated that they were formed by abnormal excision of lambda prophage. Formation of transducing phages w...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122680
更新日期:1989-03-01 00:00:00
abstract::1. As a part of studies on the mechanism by which catecholamines are released from the nerve terminals, the synaptic vesicle fraction was isolated from bovine caudatolenticular nuclei and thalamus by differential centrifugation essentially according to the method of Kadota and Kadota (17). 2. Further centrifugation on...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a131747
更新日期:1977-09-01 00:00:00
abstract::We studied the effect of Ca2+ on the reactivities of two SH groups of DTNB light chain (Cys 128 and Cys 157) using a fluorogenic thiol reagent. It was found that a Ca2+-induced change in reactivity occurred only with Cys 128 when the light chain was in an isolated state, whereas it occurred with both Cys 128 and Cys 1...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132727
更新日期:1980-01-01 00:00:00
abstract::Seven ganglioside species were isolated and purified from erythrocyte membranes of Japanese cats by DEAE-Sephadex and Iatrobeads column chromatographies. The structures of these gangliosides were determined as Gmi(NeuGc), Gm3(NeuAc), GM3(NeuGc), GD3(NeuGc), GD3(NeuGc comes from NeuAc), GT3(NeuGc), and another GM3 cont...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a133775
更新日期:1982-03-01 00:00:00
abstract::Several kinds of hydrophilic proteins were examined to determine their interaction with artificial liposomes. Mitochondrial aspartate aminotransferase (m-GOT) [EC 2.6.1.1], as well as cytochrome c, was found to interact strongly with negatively charged liposomes. In each case, an appreciable amount of the protein boun...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:
更新日期:1979-05-01 00:00:00
abstract::Syk protein-tyrosine kinase (PTK) has been implicated in a variety of hematopoietic cell responses including immunoreceptor signaling. However, so far, there has been no evidence of the expression of Syk or Syk-related PTK in non-hematopoietic tissues. In this study, we have purified from blood cell-depleted rat liver...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a022610
更新日期:2000-02-01 00:00:00
abstract::Thyrotropin releasing hormone (TRH) caused significant breakdown of phosphatidylinositol 4,5-bisphosphate (PIP2) in GH3 cells, but vasoactive intestinal peptide (VIP) did not. However, VIP enhanced the TRH-induced hydrolysis of PIP2, the conversion of phosphatidylinositol 4-phosphate (PIP) to PIP2 and the accumulation...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122074
更新日期:1987-09-01 00:00:00
abstract::We previously reported that novel Mg(2+)-ATPases were induced in rat liver peroxisomes by clofibrate administration and that these activities consisted of at least two types of enzymes, N-ethylmaleimide (NEM)-sensitive and -resistant. Here we present evidence that neither of these major peroxisomal ATPases is associat...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123967
更新日期:1992-12-01 00:00:00
abstract::We have developed a screening system for artificial small RNAs (sRNAs) that inhibit the growth of Escherichia coli. In this system, we used a plasmid library to express artificial sRNAs (approximately 200 bases long) containing 60 bases of random nucleotide sequence. The induced expression of the known rydB sRNA in th...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvr055
更新日期:2011-09-01 00:00:00
abstract::1. New methods of preparing troponins from slow skeletal and cardiac muscle of the chicken have been developed. The electrophoretic mobilities of slow skeletal muscle troponin subunits were different from those of the corresponding fast skeletal muscle subunits. 2. A new method for determining the amount of divalent c...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132589
更新日期:1979-09-01 00:00:00
abstract::Using an F-actin affinity column, a 60 kDa fragment of a 71 kDa F-actin-binding protein was partially purified from Tetrahymena pyriformis. After digestion of the 60 kDa fragment with cyanogen bromide, the N-terminal 21-amino acid sequence of one of the resulting peptides was found to show sequence similarity to a reg...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a021980
更新日期:1998-04-01 00:00:00
abstract::Three radioactive glycopeptides were isolated from human peripheral lymphocytes stimulated with Wistaria floribunda mitogen in the presence of D-[14C]glucosamine hydrochloride by mild trypsin digestion followed by gel filtration and preparative high-voltage paper electrophoresis. The carbohydrate compositions of these...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:
更新日期:1977-05-01 00:00:00
abstract::A newly isolated binding protein of peroxisomal targeting signal type 2 (PTS2) receptor Pex7, termed P7BP2, is transported into peroxisomes by binding to the longer isoform of Pex5p, Pex5pL, via Pex7p. The binding to Pex7p and peroxisomal localization of P7BP2 depends on the cleavable PTS2 in the N-terminal region, su...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvy073
更新日期:2018-12-01 00:00:00
abstract::Rat brain type II (beta) protein kinase C (PKC) was phosphorylated by rat lung casein kinase II (CK-II). Neither type I (gamma) nor type III (alpha) PKC was significantly phosphorylated by CK-II. CK-II incorporated 0.2-0.3 mol of phosphate into 1 mol of type II PKC. This phosphate was located at the single seryl resid...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123635
更新日期:1991-10-01 00:00:00
abstract::A new protein factor that regulates the state of actin polymerization was purified from porcine brain by DNase I-agarose chromatography. The purified protein factor consisted of a 1 : 1 complex of 88,000 dalton polypeptide and actin. When actin was polymerized by salt in the presence of the factor, the steady-state vi...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a133363
更新日期:1981-05-01 00:00:00
abstract::The biosynthesis of elongation factor Tu (EF-Tu) has been studied in a cell-free system with DNA of the transducing phage lambdarifd18 as a template. It was found that the synthesis of EF-Tu in this system was inhibited by about 60% in the presence of 0.3 to 0.6 mM guanosine-5'-diphosphate-3'-diphosphate (ppGpp). The ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132539
更新日期:1979-08-01 00:00:00
abstract::The ATP requirement for two steps of DNA replication, the synthesis and subsequent joining of Okazaki fragments, was investigated by using isolated HeLa cell nuclei. Among adenine nucleotides tested, high levels of dATP and ADP stimulated DNA synthesis. In the presence of high levels of ATP, the addition of high level...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a133262
更新日期:1981-03-01 00:00:00
abstract::Anti-cobrotoxin antibodies can be separated into precipitin and non-precipitin antibodies. The precipitin antibody possesses the same binding affinity to cobrotoxin as non-precipitin antibody, but the neutralizing capability of the latter is superior to that of the former in blocking cobrotoxin binding to nicotinic ac...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a124668
更新日期:1994-12-01 00:00:00
abstract::Saccharomyces cerevisiae has three distinct citrate synthases, two located in mitochondria (mature Cit1p and Cit3p) and one in peroxisomes (mature Cit2p). While the precursor of the major mitochondrial enzyme, Cit1p, has a signal for mitochondrial targeting at its N-terminus (MTS), Cit2p has one for peroxisomal target...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a022834
更新日期:2000-12-01 00:00:00
abstract::ENO1-'lacZ fusions with various lengths of the ENO1 5'-flanking region were constructed on various types of yeast plasmid vectors. The fully expressed level of beta Gal directed by ENO1-'lacZ fusions differed depending on the type of vector, but on any type of vector, beta Gal activity was not greatly influenced by th...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122031
更新日期:1987-07-01 00:00:00
abstract::Rat serum carboxylesterase [carboxylic ester hydrolase, EC 3.1.1.1] was purified by ammonium sulfate precipitation, chromatography on DEAE-cellulose, QAE Sephadex A-50 and brushite, and gel filtration on Sephadex G-200. This purified enzyme was shown to be a single protein band on slab gel electrophoresis and its fina...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132254
更新日期:1978-12-01 00:00:00
abstract::In the preceding papers, we showed that one of the two complementar factors of polypeptide chain elongation factor 1 (EF-1) from pig liver, EF-1alpha, functionally corresponds to bacterial EF-Tu (Nagata, S., Iwasaki, K., and Kaziro, Y. (1976) Arch. Biochem. Biophys. 172, 168), while the other, EF-1betagamma, as well a...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a131929
更新日期:1978-02-01 00:00:00
abstract::We expressed human myotonic dystrophy protein kinase (DMPK) in the fission yeast Schizosaccharomyces pombe, in which the overexpression of human DMPK affects cell growth and cell shape. The human DMPK protein has a leucine-rich domain at the N-terminus, a serine/threonine kinase domain in the middle, and a hydrophobic...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvg171
更新日期:2003-10-01 00:00:00
abstract::The crystal structures of the GTP- and GDP-bound alpha subunits of heterotrimeric GTP-binding proteins were recently determined, and a conserved Thr residue in the G2 (linker 2) region of the alpha subunits, which corresponds to Thr182 in Gi2 alpha, was deduced to interact with the gamma-phosphate of GTP and Mg2+. To ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/118.5.1083
更新日期:1995-11-01 00:00:00
abstract::Candida albicans is a commensal organism, but causes life-threatening infections in immunocompromised patients. Certain factors such as yeast-hyphae transition and hydrolytic enzymes are suggested as virulence attributes of C. albicans. Among them, 10 types of secreted aspartic protease (SAP) genes have received parti...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvr073
更新日期:2011-10-01 00:00:00
abstract::After partial chromatographic purification of rat liver cell sap on DEAE-cellulose, including the removal of type M2 pyruvate kinase, different forms of type L pyruvate kinase were separated by chromatofocusing. Three fractions of pyruvate kinase activity were found, eluting at pH 5.0, 5.2, and 5.3, respectively. The ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a134719
更新日期:1984-04-01 00:00:00
abstract::Dimer formation of HIV-1 genomic RNA through its dimerization initiation site (DIS) is crucial to maintaining infectivity. Two types of dimers, the initially generated kissing-loop dimer and the subsequent product of the extended-duplex dimer, are formed in the stem-bulge-stem region with a loop including a self-compl...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvi158
更新日期:2005-11-01 00:00:00
abstract::The pH-activity curve of heavy meromyosin ATPase [EC 3.6.1.3] was measured at various temperatures. The pH-activity curve at higher temperatures showed a maximum at low pH and a minimum at pH 7 to 8 as has been already reported. At lower temperatures it was sigmoidal in shape, similar to a simple dissociation curve of...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a131458
更新日期:1977-02-01 00:00:00