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 acetylcholine receptor (nAChR). After preincubation with antibodies, cobrotoxin completely lost its binding activity to nAChR. The dissociation of cobrotoxin-nAChR complex by the antibodies was low, and 60% of the complex formation appeared to be irreversible. These results indicate that the neutralization of cobrotoxin by the antibody may predominantly involve unbound, receptor-free cobrotoxin. The relationships of neutralization capacity and binding affinity as well as bond strength between cobrotoxin and its antibodies are incongruous. Different local conformational changes of a unique Trp in cobrotoxin on binding with the precipitin and non-precipitin antibodies seem to lead to different accessibility for fluorescence quenchers. Characterization of the binding domains by immunoprecipitation with the antibodies correlated with the quenching results. Thus, the binding topography of cobrotoxin may play an important role over the binding affinity and bond strength in neutralization by cobrotoxin antibody.
journal_name
J Biochemjournal_title
Journal of biochemistryauthors
Kuo KW,Chang LS,Lin PM,Leaber RJ,Chang CCdoi
10.1093/oxfordjournals.jbchem.a124668subject
Has Abstractpub_date
1994-12-01 00:00:00pages
1227-32issue
6eissn
0021-924Xissn
1756-2651journal_volume
116pub_type
杂志文章abstract::A particulate enzyme preparation from Bacillus stearothermophilus synthesized 1,3-poly(glycerol phosphage) from CDPglycerol at an optimum pH of 8.0 and the reaction was stimulated by divalent cations. Km for CDPglycerol was 0.18 mM. The synthesis was inhibited by CMP, CDP, and CTP and by concentrations of CDP-glycerol...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a130759
更新日期:1975-03-01 00:00:00
abstract::The activities of the digestive enzymes, maltase [EC 3.2.1.20], sucrase [EC 3.2.1.26], trehalase [EC 3.2.1.28], Leucine aminopeptidase [EC 3.4.11.1], and alkaline phosphatase [EC 3.1.3.1] were measured in various regions of the small intestine of rats. The activities of all these enzymes were much higher in the jejunu...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a130930
更新日期:1975-09-01 00:00:00
abstract::Aggregate formation of recombinant human erythropoietin (r-EPO) on heat-treatment was followed by gel permeation chromatography combined with a low-angle laser light scattering technique under various conditions with respect to pH and salt concentration in order to provide basic knowledge about the change strictly req...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123961
更新日期:1992-11-01 00:00:00
abstract::The amount of S-II, a protein specifically stimulating RNA polymerase II, was measured in various mouse organs by a micro complement fixation assay. The amount was almost the same in brain, liver, kidney, spleen, and Ehrlich ascites tumor cells on the basis of DNA, being about 3.8 micrograms/mg DNA, which corresponds ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a133117
更新日期:1980-11-01 00:00:00
abstract::Inosine triphosphate (ITP) does not serve as a substrate for myosin light-chain kinase from gizzard muscle. That is to say, myosin light-chain is not phosphorylated in ITP media. Nevertheless, at pH 6.8, 1 mM or 5 mM ITP induces superprecipitation of skeletal acto-gizzard myosin. The ITP-induced superprecipitation occ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132556
更新日期:1979-08-01 00:00:00
abstract::Binding of native connectin (2,100 kDa fragment of alpha-connectin) to myosin filaments was investigated using a sedimentation technique and densitometric estimations of the separated proteins. In the presence of 60 mM KCl and 5 mM phosphate buffer, pH 7.0, as much as 1.5 mol of connectin was bound to 1 mol of myosin,...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122661
更新日期:1989-02-01 00:00:00
abstract::By using commercially available anhydrous hydrazine in the gas-phase, mucin-type oligosaccharides were released from porcine gastric mucin (PGM) and bovine fetuin. The data indicated that a certain amount of the oligosaccharides from PGM were further degraded. Despite this, the HPLC elution profile of the anthranilic ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvp031
更新日期:2009-06-01 00:00:00
abstract::1. Z-line constituents contributing to the formation of the contraction bands in chicken myofibrils were investigated by using the rabbit calcium-activated factor (CAF). 2. CAF digestion hampered the formation of the contraction bands and increased the amount of soluble proteins which are apparently derived from the Z...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:
更新日期:1980-07-01 00:00:00
abstract::Previous studies have shown that purified mitochondrial outer membrane is able to catalyze the transfer of sialic acid from CMP-Neu5Ac to an exogenous asialoglycoprotein acceptor, asialofetuin. Considering the heterogeneity of the glycan chains borne by this glycoprotein, an investigation of mitochondrial sialyltransf...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123644
更新日期:1991-11-01 00:00:00
abstract::To clarify the relationship among ryanodine receptor isoforms from skeletal muscles of various vertebrates (alpha- and beta-isoforms with smaller and larger mobilities on SDS-polyacrylamide gel electrophoresis, respectively), we examined the cross-reactivities of those receptors from 13 animal species by Western blot ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a124636
更新日期:1994-11-01 00:00:00
abstract::Affinity chromatography based on the reaction between SH groups in protein and +HgC6H4CO groups in the p-mercuribenzoylaminoethyl derivative of Sepharose 4B was examined with a crude preparation of calf thymus cysteine-containing histone. Adsorption of the histone onto the column by specific coupling was found to be ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a130737
更新日期:1975-02-01 00:00:00
abstract::The effects of freezing on Alcaligenes sp. nitrite reductase [nitric-oxide: ferricytochrome c oxidoreductase, EC 1.7.2.1] dissolved in sodium phosphate (pH 7.2) were investigated. The nitrite reductase was gradually activated with time in the frozen state, resulting in an increase in its activity of 2.5-4.5 times. The...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a135395
更新日期:1985-11-01 00:00:00
abstract::We examined the effects of growth factors on intracellular free Mg2+ concentrations ([Mg2+]i) in single Swiss 3T3 fibroblasts, using microfluorometry of a Mg(2+)-sensitive dye mag-fura-2. We had already noted an increase in [Mg2+]i after exposure to bombesin for 30-60 min [Ishijima, S., Sonoda, T., & Tatibana, M. (199...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a124403
更新日期:1994-04-01 00:00:00
abstract::A large COOH-terminal domain of Serratia marcescens serine protease (SSP) is essentially required for the excretion of the mature protease region through the outer membrane in Escherichia coli. For investigation of the possibility of transporting foreign periplasmic proteins by utilizing the function of the COOH-termi...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a124527
更新日期:1994-08-01 00:00:00
abstract::The plant hormone ethylene is generated from a unique precursor, 1-aminocyclopropane-1-carboxylate (ACC). In previous studies, ACC deaminase, which degrades ACC to alpha-ketobutyrate and ammonia, was found in four strains of Pseudomonas, characterized, and sequenced. To verify the wider distribution of ACC deaminase i...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a022050
更新日期:1998-06-01 00:00:00
abstract::Fluorescence titration curves of 2-[4'-iodoacetamido)anilino)naphthalene-6-sulfonic acid-labeled troponin (IAANS-labeled Tn) and troponin-1-anilinonaphthalene-8-sulfonic acid (Tn-ANS) complex indicated that the fluorescent moiety, IAANS or ANS, detects conformational change of troponin I (TnI) or Tn due to the Ca2+ bi...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a134415
更新日期:1983-09-01 00:00:00
abstract::F-Actin was digested with alpha-chymotrypsin in 6 M urea, and two peptide fragments from subdomain 4 of actin molecule [Kabsch, W., Mannherz, H.G., Suck, D., Pai, E.F., & Holmes K.C. (1990) Nature 347, 37-44] were purified by reverse-phase HPLC and Sephadex G-50 gel filtration. The peptide fragments were identified as...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a123912
更新日期:1992-09-01 00:00:00
abstract::The complete amino acid sequence and disulfide bridge location of HR2a, one of the hemorrhagic proteins isolated from the snake venom of Trimeresurus flavoviridis, have been determined by analysis of peptides derived from digests with cyanogen bromide, lysyl endopeptidase, trypsin, and Staphylococcus aureus V8 proteas...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122756
更新日期:1989-05-01 00:00:00
abstract::GM2 containing NeuGc was found to be a major ganglioside in the liver of most inbred strains of mouse we have examined so far. They were DBA/2, C3H/He, C57BL/6, BALB/c, and CBA mice. However, WHT/Ht mouse does not contain a detectable amount of GM2 (NeuGc) but has GM3 containing NeuGc as the major ganglioside in the l...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/93.3.895
更新日期:1983-03-01 00:00:00
abstract::Two G-protein-coupled receptors (GPCRs) that couple with Gαq/11, B2 bradykinin (BK) receptor (B2R) and ATP/UTP receptor P2Y2 (P2Y2R), are ubiquitously expressed and responsible for vascular tone, inflammation, and pain. We analysed the cellular signalling of P2Y2Rs in cells that express B2Rs. B2R desensitization induc...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvv022
更新日期:2015-08-01 00:00:00
abstract::Cholesterol: oxygen oxidoreductase [EC 1.1.3.6] from Brevibacterium sterolicum (ATCC 21387) was found to catalyze the oxidation of steroids such as sterols, steroid hormones, and bile acids having a free C-3beta hydroxyl group. However, the enzyme was inactive towards estradiol and estriol and had a weak activity towa...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a132472
更新日期:1979-06-01 00:00:00
abstract::Bindings of cobra venom phospholipases A2 to micelles of n-hexadecylphosphorylcholine were studied by the tryptophyl fluorescence method at 25 degrees C and ionic strength 0.1. The data were analyzed by assuming that the micellar surface has multiple binding sites for the enzyme and these sites are identical and mutua...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a134333
更新日期:1983-07-01 00:00:00
abstract::pKY2289, a ColE1::Tn3 derivative, useful for direct selection of cells carrying a hybrid plasmid, was deleted of its mobility functions and parts of the transposon including the left inverted repeat. This deletion mutant, named pKY2700 expresses low levels of colicin E1 synthesis even in recA cells. A nitrosoguanidine...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a133798
更新日期:1982-04-01 00:00:00
abstract::Using the mRNA differential display technique and Western blot analysis, the present study demonstrates that induction of KAR2 occurs when misfolded membrane-bound cytochrome P450, mutated in its cytosolically exposed domain, is expressed in Saccharomyces cerevisiae. Using various KAR2 promoter constructs in front of ...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a022553
更新日期:1999-12-01 00:00:00
abstract::Proteins in the brush border membrane (BBM) of the midgut binding to the insecticidal Cry1Ac toxin from Bacillus thuringiensis were investigated to examine the lower sensitivity of Bombyx mori to Cry1Ac, and new aminopeptidase N that bound to Cry1Ac was discovered. DEAE chromatography of Triton X-100-soluble BBM prote...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvj024
更新日期:2006-02-01 00:00:00
abstract::Separation of 13-hydroperoxylinoleic acid or 13-hydroperoxylinolenic acid from linoleic acid or linolenic acid, respectively, was carried out easily and quickly by high performance liquid chromatography on porous polymer gel (TSK-Gel LS-140) using n-hexane/ethanol as an eluent. An eluent containing a large amount of n...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:
更新日期:1977-08-01 00:00:00
abstract::Several synthetic peptides derived from the C-terminal domain sequence of a hemolytic lectin, CEL-III, were examined as to their action on bacteria and artificial lipid membranes. Peptide P332 (KGVIFAKASVSVKVTASLSK-NH(2)), corresponding to the sequence from residue 332, exhibited strong antibacterial activity toward G...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/jb/mvh007
更新日期:2004-01-01 00:00:00
abstract::Ras is a signal-transducing, guanine nucleotide-binding protein for various membrane receptors including tyrosine kinase receptors. Ras participates in the regulation of cell proliferation, differentiation, and morphology. Activated ras oncogenes have been identified in various forms of human cancer including epitheli...
journal_title:Journal of biochemistry
pub_type: 杂志文章,评审
doi:10.1093/oxfordjournals.jbchem.a022519
更新日期:1999-11-01 00:00:00
abstract::A synchronous enzyme-reaction system using water-soluble formazan and a non-enzymatic electron mediator was developed and applied to an enzyme immunoassay (EIA). The reaction system consists of four steps: (I) dephosphorylation of NADP(+) to produce NAD(+) by alkaline phosphatase (ALP), (II) reduction of NAD(+) to pro...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a003082
更新日期:2002-01-01 00:00:00
abstract::Ca2+-binding of S-100 protein was studied using a Ca2+ electrode at pH 6.80. In the presence of 0.1 M KCl and 10 mM MgCl2 (ionic strength 0.13), Ca2+-binding to S-100 protein occurred in three steps with positive cooperativity. The numbers of bound Ca2+ ions in the three steps were 2, 2, and 4. The Ca2+-binding consta...
journal_title:Journal of biochemistry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.jbchem.a122596
更新日期:1988-12-01 00:00:00