abstract：:The cholesterol content of rat liver plasma membranes was manipulated using either cholesterol-free or cholesterol-enriched liposomes. Removal of cholesterol from the membranes led to a marked increase in 5'-nucleotidase activity. However, increase in cholesterol content failed to exert any significant effect on 5'-nu...

journal_title：FEBS letters

authors： Whetton AD,Houslay MD

更新日期：1983-06-27 00:00:00

abstract：:Disruption of yeast spheroplasts by DEAE-dextran in isoosmotic conditions allows isolation of relatively undamaged subcellular fractions from yeast. The preservation of mitochondria and vacuoles permits the simultaneous isolation of the cytosol with negligible contamination by vacuolar proteinases and therefore, virtu...

journal_title：FEBS letters

authors： Schwencke J,Canut H,Flores A

更新日期：1983-06-13 00:00:00

abstract：:Equine platelet beta tropomyosin (247 residues), like rabbit skeletal muscle alpha tropomyosin (284 residues) has a repeating pattern of amino acid residues characteristic of a coiled-coil structure. When compared with the muscle protein, it is extended by 5 residues at the NH2-terminus and possesses two 21 residue de...

journal_title：FEBS letters

authors： Lewis WG,Cote GP,Mak AS,Smillie LB

更新日期：1983-06-13 00:00:00

abstract：:We describe the extraction and stabilization in vitro of discrete complexes of interferon and cellular receptor proteins. A homogeneous complex of Mr 230 000 was extracted at the time of peak receptor binding (30 min). Complex formation was specific for human interferon. At later times a second complex could also be e...

journal_title：FEBS letters

authors： Eid P,Mogensen KE

更新日期：1983-05-30 00:00:00

abstract：:The band 3 protein-mediated, valinomycin-induced KCl efflux continues to increase with increasing [KCl] when the Cl-/Cl- equilibrium exchange becomes saturated. This suggests the existence of a band 3-mediated component of Cl- flux that contributes to the electrical conductance without being related to slippage; i.e.,...

journal_title：FEBS letters

authors： Kaplan JH,Pring M,Passow H

更新日期：1983-05-30 00:00:00

abstract：:The influence of islet-activating protein (IAP), a Bordetella pertussis toxin, was studied on adenylate cyclase and GTPase activities in rat adipocyte membranes. Pretreatment of rats or intact rat adipocytes with IAP did not affect adenylate cyclase inhibition by the stable GTP analog, GTP gamma S, whereas inhibition ...

journal_title：FEBS letters

authors： Aktories K,Schultz G,Jakobs KH

更新日期：1983-05-30 00:00:00

abstract：:Cytochrome oxidase o has been isolated from the obligately aerobic, methylotrophic bacterium Methylophilus methylotrophus in the form of a cytochrome cL-o complex. The latter is comprised of cytochrome cL (Mr 21 000) and cytochrome o (Mr 29 000) in a 1-2:1 ratio, possibly in association with one or more minor polypept...

journal_title：FEBS letters

authors： Carver MA,Jones CW

更新日期：1983-05-08 00:00:00

abstract：:The effects of ribosomal protein L5 on the conformation of 5 S rRNA in the 5 S rRNA-protein L5 complex extracted from rat liver ribosomes have been studied by laser Raman spectroscopy. A comparison of the spectra shows small protein-induced conformational changes in the 5 S rRNA, but most of the base-paired regions ap...

journal_title：FEBS letters

authors： Fabian H,Böhm S,Carius W,Misselwitz R,Welfle H

更新日期：1983-05-08 00:00:00

abstract：:Antimycin, 2-nonyl-4-hydroxyquinoline N-oxide and funiculosin induce O.2(-) generation by submitochondrial particles oxidizing succinate, whereas KCN, mucidin, myxothiazol or 2,3-dimercaptopropanol inhibit O.2(-) generation. Thenoyltrifluoroacetone does not induce superoxide production by itself but slightly stimulate...

journal_title：FEBS letters

authors： Ksenzenko M,Konstantinov AA,Khomutov GB,Tikhonov AN,Ruuge EK

更新日期：1983-05-02 00:00:00

abstract：:We review the evidence for H+ translocation by reconstituted cytochrome c oxidase; attention is paid to those aspects which we feel most open to criticism. Possible alternative hypotheses are assessed, with regard to experiments carried out to test them directly and with regard to published data. We conclude that, whi...

journal_title：FEBS letters

authors： Casey RP,Azzi A

更新日期：1983-04-18 00:00:00

abstract：:We show that N-1 in adenine of chromosomal DNA is methylated by treatment of metaphase chromosomes with dimethylsulphate while this is not the case in chromatin. The data on methylation are consistent with those obtained from the experiments with S1-nuclease treatment of chromatin and chromosomes. This suggests a disa...

journal_title：FEBS letters

authors： Belyaev ND,Budker VG,Dubrovskaya VA,Matveeva NM

更新日期：1983-04-18 00:00:00

abstract：:The diterpene forskolin stimulated rat cardiac adenylate cyclase activity at least 20-fold and potentiated the effect of NaF. The stimulatory effect of forskolin was reduced in the presence of Gpp(NH)p. Ethanol markedly reduced the stimulation of adenylate cyclase by forskolin while potentiating NaF and Gpp(NH)p stimu...

journal_title：FEBS letters

authors： Robberecht P,Waelbroeck M,Chatelain P,Camus JC,Christophe J

更新日期：1983-04-05 00:00:00

abstract：:The effects of nine drugs on the CD spectra of a synthetic calcium binding analog of site III of rabbit skeletal troponin C, can generally be divided into 3 groups: (1) that consisting of haloperidol, benperidol, molindone and promethazine, had no effect on the CD spectrum or calcium sensitivity of the apopeptide; (2)...

journal_title：FEBS letters

authors： Reid RE,Gariépy J,Hodges RS

更新日期：1983-04-05 00:00:00

abstract：:32P-Labelled washed rabbit platelets were incubated with 0.6 nM platelet activating factor (PAF-acether), giving a full aggregation and release response within 30-60 s. The major phospholipid changes observed under these conditions were: (1) An increased labelling of phosphatidic acid (PA) within 10 s and of phosphati...

journal_title：FEBS letters

authors： Mauco G,Chap H,Douste-Blazy L

更新日期：1983-03-21 00:00:00

abstract：:A bovine anterior pituitary polypeptide that stimulates the replication of rat and human adipocyte precursors has been purified. Its Mr is 44 000-53 000 and its isoelectric point is 9.8-10.3. While pituitary basic fibroblast growth factor is equally mitogenic on adipocyte precursors and skin fibroblasts, the polypepti...

journal_title：FEBS letters

authors： Lau DC,Roncari DA,Yip DK,Kindler S,Nilsen SG

更新日期：1983-03-21 00:00:00

abstract：:The isolation of a brain peptide identical to the intestinal peptide PHI (peptide HI) is described. The peptide was isolated from porcine brain extract using a chemical assay method based on its C-terminal isoleucine amide structure. The complete amino acid sequence of the peptide was found to be: His-Ala-Asp-Gly-Val-...

journal_title：FEBS letters

authors： Tatemoto K,Carlquist M,McDonald TJ,Mutt V

更新日期：1983-03-21 00:00:00

abstract：:A tetradecapeptide with a sequence identical to residues 26-39 of the cro protein from bacteriophage lambda has been synthesized. This peptide has no secondary structure in an aqueous buffer but adopts an alpha-helical conformation in the presence of 20% hexafluoroisopropanol. The fluorescence of the single tyrosyl re...

journal_title：FEBS letters

authors： Mayer R,Lancelot G,Hélène C

更新日期：1983-03-21 00:00:00

abstract：:Incubation of isolated hepatocytes containing normal Ca2+ levels with angiotensin II, vasopressin or A23187 caused significant inhibition of the cAMP response to glucagon. Angiotensin II also inhibited cAMP accumulation induced by either glucagon or epinephrine in Ca2+-depleted hepatocytes. When submaximal doses of ho...

journal_title：FEBS letters

authors： Morgan NG,Exton JH,Blackmore PF

更新日期：1983-03-07 00:00:00

abstract：:The replacement of O2 with CO was studied on cobalt-iron hemoglobin hybrids. Both proto- and mesocobalt hemes were used for the reconstitution. In the oxy quaternary conformation no difference is observed between alpha- and beta-subunits when only proto hemes are present in the hybrid (k4 = 30 s-1, k'4/l'4 = 2.5). If ...

journal_title：FEBS letters

authors： Oertle M,Winterhalter KH,Di Iorio EE

更新日期：1983-03-07 00:00:00

abstract：:When bottromycin A2 was added to an in vitro protein synthesis system carried out by naturally occurring polysomes, it inhibited protein synthesis effectively. Examination of the 3 steps of peptide chain elongation revealed that the binding of aminoacyl-tRNA to the polyribosomes was inhibited by bottromycin A2. In con...

journal_title：FEBS letters

authors： Otaka T,Kaji A

更新日期：1983-03-07 00:00:00

abstract：:A cytochrome c (cyt. c) was solubilized with Triton-X-100 and co-purified with cytochrome c oxidase from membranes of chemotrophically grown cells of Rhodopseudomonas capsulata. Cyt. c and cytochrome oxidase were separated on Sephadex G-50 columns. Antibodies against cytochrome c2 from the same bacterium did not cross...

journal_title：FEBS letters

authors： Hüdig H,Drews G

更新日期：1983-02-21 00:00:00

abstract：:Chronic indirect stimulation of fast twitch rabbit muscle induced a rapid reduction in parvalbumin concentration. When compared to the unstimulated contralateral muscle, parvalbumins were reduced to 55% following 6 days of stimulation. Prolonged stimulation further reduced parvalbumins so that they were undetectable a...

journal_title：FEBS letters

authors： Klug G,Reichmann H,Pette D

更新日期：1983-02-21 00:00:00

abstract：:In dog-fish spermatid nuclei two intermediate proteins S1 and S2 replace histones before the setting down of protamines. These spermatid-specific proteins were isolated by carboxymethyl-cellulose chromatography and purified by high pressure liquid chromatography. S1 and S2 are characterized by a high content of basic ...

journal_title：FEBS letters

authors： Chauviere M,Laine B,Sautiere P,Chevaillier P

更新日期：1983-02-21 00:00:00

abstract：:A sensitive and specific radioimmunoassay suitable for direct measurement of leukotriene C4 was developed. Acetylated leukotriene C4 was coupled to polyamino bovine serum albumin using 1-ethyl-3-(3-dimethylamino-propyl) carbodiimide hydrochloride as coupling agent. The conjugate in complete or incomplete Freund's adju...

journal_title：FEBS letters

authors： Lindgren JA,Hammarström S,Goetzl EJ

更新日期：1983-02-07 00:00:00

abstract：:Liver microsomes contain a vitamin K and O2-dependent carboxylase that converts peptide-bound glutamyl residues to gamma-carboxyglutamate residues. The peptide Boc-O-phospho-Ser-O-phospho-Ser-Leu-OMe has now been synthesized. This peptide inhibits the carboxylation of endogenous protein precursors by a detergent-solub...

journal_title：FEBS letters

authors： Rich DH,Kawai M,Goodman HL,Engelke J,Suttie JW

更新日期：1983-02-07 00:00:00

abstract：:It was of interest to examine whether yeast Cu-thionein could be used to transfer the thiolate bound copper directly into the copper binding site of 'blue' apoproteins which contain free thiol groups. In particular apo-stellacyanin was used in the present study and it was found to be able to accept Cu(I) from yeast Cu...

journal_title：FEBS letters

authors： Hartmann HJ,Morpurgo L,Desideri A,Rotilio G,Weser U

更新日期：1983-02-07 00:00:00

abstract：:alpha-1-Antitrypsin is found in hepatocytes as a high-mannose glycoprotein (Mr 49 000), extracellularly as a complex-type glycoprotein (Mr 54 000). Deglycosylation of both forms with peptide: N-glycosidase led to proteins of identical app. Mr (41 000). The sequence of 26 N-terminal amino acids of rat alpha 1-antitryps...

journal_title：FEBS letters

authors： Gross V,Kaiser C,Tran-Thi TA,Schmelzer E,Witt I,Plummer TH Jr,Heinrich PC

更新日期：1983-01-24 00:00:00

abstract：:Dried cells of Brevibacterium ammoniagenes are a good enzyme source for the preparative synthesis of CoA from pantothenic acid, L-cysteine and ATP. A problem with this synthesis is that the CoA synthesis is repressed by negative feedback inhibition by CoA to pantothenate kinase, the first step enzyme for the biosynthe...

journal_title：FEBS letters

authors： Shimizu S,Komaki R,Tani Y,Yamada H

更新日期：1983-01-24 00:00:00

abstract：:N-glycosidically-linked glycans released by hydrazinolysis of human factor VIII/von Willebrand factor (FVIII/vWf) were separated by high-voltage electrophoresis. Five fractions were obtained, one of them representing 60% of the total amount of the N-glycosidically-linked glycans of FVIII/vWf. On the basis of the carbo...

journal_title：FEBS letters

authors： Debeire P,Montreuil J,Samor B,Mazurier C,Goudemand M,van Halbeek H,Vliegenthart JF

更新日期：1983-01-10 00:00:00

abstract：:The cholecystokinin (CCK) receptor in purified plasma membranes prepared from mouse pancreatic acini had a binding affinity of 1.8 nM, an acid pH optimum between 6.0 and 6.5, and an analog specificity of CCK8 greater than CCK33 greater than desulphated CCK8 greater than CCK4. Binding of CCK to its receptor was abolish...

journal_title：FEBS letters

authors： Sakamoto C,Williams JA,Wong KY,Goldfine ID

更新日期：1983-01-10 00:00:00

abstract：:Phosphorylation of fibronectin was studied in quiescent vs growing cells from several species. Fibronectin secreted by actively growing cells exhibits a significantly higher level of phosphorylation than does the fibronectin secreted by quiescent cells of the same species. ...

journal_title：FEBS letters

authors： Ali IU

更新日期：1983-01-10 00:00:00

abstract：:Elongation factor EF-Tu from Escherichia coli was labelled with N-[14C]tosyl-L-phenylalanylchloromethane, digested with trypsin and the peptides obtained separated by HPLC. The only radioactive peak recovered corresponded to tryptic peptide containing residues 75-98. Sequencing of the peptide by automated Edman degrad...

journal_title：FEBS letters

authors： Jonák J,Petersen TE,Clark BF,Rychlík I

更新日期：1982-12-27 00:00:00

abstract：:Gangliosides and neutral glycolipids of muscles from normal and dystrophic chickens were studied. Total glycolipid content of the degenerating muscles was higher than the normal muscles. In addition, the myopathic muscles contained a ganglioside which was absent in the unaffected muscles from normal and dystrophic chi...

journal_title：FEBS letters

authors： Kundu SK,Misra LK,Luthra MG

更新日期：1982-12-27 00:00:00

abstract：:The conformation in solution of the biantennary complex type oligosaccharide unit derived from human serotransferrin has been investigated using 1H-1H Nuclear Overhauser Effect (NOE) measurements at 300 MHz. From quantitation of the NOE, the alpha(1-3) antenna is shown to exist in a preferred solution conformation wit...

journal_title：FEBS letters

authors： Homans SW,Dwek RA,Fernandes DL,Rademacher TW

更新日期：1982-12-27 00:00:00

abstract：:Spermidine N1-acetyltransferase in an extract from phytohemagglutinin-stimulated bovine lymphocytes was inactivated by preincubation with alkaline phosphatase. Inactivation of the acetylase with the phosphatase was totally inhibited by addition of pyrophosphate. These results suggest that spermidine N1-acetyltransfera...

journal_title：FEBS letters

authors： Matsui I,Otani S,Kamei M,Morisawa S

更新日期：1982-12-13 00:00:00

abstract：:Glycogen synthase kinase-5 (casein kinase-II) phosphorylates glycogen synthase on a serine termed site 5. This residue is just C-terminal to the 3 serines phosphorylated by glycogen synthase kinase-3, which are critical for the hormonal regulation of glycogen synthase in vivo. Although phosphorylation of site 5 does n...

journal_title：FEBS letters

authors： Picton C,Woodgett J,Hemmings B,Cohen P

更新日期：1982-12-13 00:00:00

abstract：:In brain tissue a spectrin-like calmodulin-binding protein calspectin, or fodrin, is concentrated in a synaptosome fraction, where most of the calspectin is associated with the synaptic membranes. This endogenous calspectin was phosphorylated by protein kinase system(s) associated with the membranes. Here, we report t...

journal_title：FEBS letters

authors： Sobue K,Kanda K,Kakiuchi S

更新日期：1982-12-13 00:00:00

abstract：:Extensive data on the glycosaminoglycan (GAG) composition and the collagen fibril diameter distribution have been collected for a diverse range of connective tissues. It is shown that tissues with the smallest diameter collagen fibrils (mass-average diameter less than 60 nm) have high concentrations of hyaluronic acid...

journal_title：FEBS letters

authors： Parry DA,Flint MH,Gillard GC,Craig AS

更新日期：1982-11-22 00:00:00

abstract：:Megasphaera elsdenii and Clostridium MP flavodoxins have been investigated by photo-CIDNP techniques. Using time-resolved spectroscopy and external dyes carrying different charges it was possible to assign unambiguously the resonance lines in the NMR-spectra to tyrosine, tryptophan and methionine residues in the two p...

journal_title：FEBS letters

authors： Moonen CT,Hore PJ,Müller F,Kaptein R,Mayhew SG

更新日期：1982-11-22 00:00:00

abstract：:Saturable binding sites for the labelled calcium antagonist (+/-)[3H]nimodipine were found in guinea-pig hind limb skeletal muscle homogenates. Binding sites were enriched in a microsomal pellet by differential centrifugation of the homogenate. [3H]Nimodipine binding (Kd = 1.5 +/- 0.03 nM, Bmax = 2.1 +/- 0.25 pmol/pro...

journal_title：FEBS letters

authors： Ferry DR,Glossmann H

更新日期：1982-11-08 00:00:00