Structural effects in reactivity and adduct formation of polycyclic aromatic epoxide and diol epoxide derivatives with DNA: comparison between 1-oxiranylpyrene and benzo[a]pyrenediol epoxide.

abstract：:The synthetic peptide SNX-111 corresponding to the sequence of the omega-conopeptide MVIIA from the venom of the marine snail Conus magus is a highly potent and selective antagonist of N-type calcium channels. We have synthesized and characterized a large number of analogs of SNX-111 in order to elucidate the structur...

journal_title：Biochemistry

authors： Nadasdi L,Yamashiro D,Chung D,Tarczy-Hornoch K,Adriaenssens P,Ramachandran J

更新日期：1995-06-27 00:00:00

abstract：:Exoenzyme S (ExoS) is a bifunctional virulence factor directly translocated into eukaryotic cells by the type III secretory process of Pseudomonas aeruginosa. Bacterial translocation of ExoS into epithelial cells is associated with diverse effects on cell function, including inhibition of growth, alterations in cell m...

journal_title：Biochemistry

authors： Fraylick JE,Riese MJ,Vincent TS,Barbieri JT,Olson JC

更新日期：2002-07-30 00:00:00

abstract：:The enzyme endonuclease V initiates repair of deaminated DNA bases by making an endonucleolytic incision on the 3' side one nucleotide from a base lesion. In this study, we have used site-directed mutagenesis to characterize the role of the highly conserved residues D43, E89, D110, and H214 in Thermotoga maritima endo...

journal_title：Biochemistry

authors： Feng H,Dong L,Cao W

更新日期：2006-08-29 00:00:00

abstract：:In eukaryotic cells, structures called heterochromatin play critical roles in nuclear processes ranging from gene repression to chromosome segregation. Biochemical and in vivo studies over the past several decades have implied that the diverse functions of heterochromatin rely on the ability of these structures to spr...

journal_title：Biochemistry

authors： Larson AG,Narlikar GJ

更新日期：2018-05-01 00:00:00

abstract：:The stability of three forms of glucoamylase from Aspergillus niger has been investigated by differential scanning and isothermal titration calorimetry: Glucoamylase 1 (GA1), which consists of a catalytic domain and a starch-binding domain (SBD) connected by a heavily O-glycosylated linker region; glucoamylase 2 (GA2)...

journal_title：Biochemistry

authors： Christensen T,Svensson B,Sigurskjold BW

更新日期：1999-05-11 00:00:00

abstract：:A role for Tyr254 in L-lactate dehydrogenation catalyzed by flavocytochrome b2 has recently been proposed on the basis of the known active-site structure and of studies that had suggested a mechanism involving the initial formation of a lactate carbanion [Lederer, F., & Mathews, F.S. (1987) in Flavins and Flavoprotein...

journal_title：Biochemistry

authors： Dubois J,Chapman SK,Mathews FS,Reid GA,Lederer F

更新日期：1990-07-10 00:00:00

abstract：:Oxindolealanine-62 lysozyme, formed by reaction with N-bromosuccinimide and purified by using affinity chromatography, was examined in its binding of homologous oligosaccharides of N-acetylglucosamine and in its catalysis of hydrolysis and of transglycosylation of the hexasaccharide of N-acetylglucosamine. Equilibrium...

journal_title：Biochemistry

authors： Shrake A,Rupley JA

更新日期：1980-08-19 00:00:00

abstract：:Biotin synthase, a member of the "radical SAM" family, catalyzes the final step of the biotin biosynthetic pathway, namely, the insertion of a sulfur atom into dethiobiotin (DTB). The active form of the enzyme contains two iron-sulfur clusters, a [4Fe-4S](2+) cluster liganded by Cys-53, Cys-57, and Cys-60 and the S-ad...

journal_title：Biochemistry

authors： Lotierzo M,Raux E,Tse Sum Bui B,Goasdoue N,Libot F,Florentin D,Warren MJ,Marquet A

更新日期：2006-10-10 00:00:00

abstract：:For some hormone receptors, the early events of signal transduction depend on their molecular arrangement and interactions at the cell surface. An understanding of the mechanism of signal transduction in general needs a careful analysis of the receptor distribution. Here, we present the first quantitative measurement ...

journal_title：Biochemistry

authors： St-Pierre PR,Petersen NO

更新日期：1992-03-10 00:00:00

abstract：:It has been suggested that dimeric tubulin can participate in the signal transduction process through its association with the GTP-binding (G) proteins Gs and Gi1. Using the photoaffinity GTP analog, azidoanilido-GTP, it has been shown that the transfer of nucleotide from tubulin to G alpha s and G alpha i1 is the key...

journal_title：Biochemistry

authors： Roychowdhury S,Rasenick MM

更新日期：1994-08-16 00:00:00

abstract：:Pyridoxal 5'-phosphate at concentrations greater than 0.5 mM inhibits polymerization of deoxynucleoside triphosphate catalyzed by a variety of DNA polymerases. The requirement for a phosphate as well as aldehyde moiety of pyridoxal phosphate for inhibition to occur is clearly shown by the fact that neither pyridoxal n...

journal_title：Biochemistry

authors： Modak MJ

更新日期：1976-08-10 00:00:00

abstract：:Polyphosphate glucokinase from Mycobacterium tuberculosis catalyzes the phosphorylation of glucose using inorganic polyphosphates [poly(P)] or ATP. The steady-state kinetic mechanisms of the poly(P)- and ATP-dependent glucokinase reactions were investigated using initial velocity, product inhibition, and dead-end inhi...

journal_title：Biochemistry

authors： Hsieh PC,Kowalczyk TH,Phillips NF

更新日期：1996-07-30 00:00:00

abstract：:The physical origin of the extremely high thermal stability of tetraether liposomes composed of the polar lipid fraction E (PLFE) from the thermoacidophilic archaebacterium Sulfolobus acidocaldarius has been investigated. The leakage rate of trapped 5, 6-carboxyfluorescein (5(6)CF) and the proton permeability in PLFE ...

journal_title：Biochemistry

authors： Komatsu H,Chong PL

更新日期：1998-01-06 00:00:00

abstract：:A nine-base oligodeoxyribonucleotide complementary to bases 2497-2505 of 23S rRNA was hybridized to both 50S subunits and 70S ribosomes. The binding of the probe to the ribosome or ribosomal subunits was assayed by nitrocellulose filtration and by sucrose gradient centrifugation techniques. The location of the hybridi...

journal_title：Biochemistry

authors： Marconi RT,Hill WE

更新日期：1989-01-24 00:00:00

abstract：:Salts and polyamines have a variety of effects on the physical properties of DNA, including stabilization against thermal melting. We wished to gain greater insight into the mechanism of this stabilization by ascertaining its effect on the dynamics of base opening and closing reactions, as measured by NMR. Since the b...

journal_title：Biochemistry

authors： Braunlin WH,Bloomfield VA

更新日期：1988-02-23 00:00:00

abstract：:Deposition of amyloid beta-peptide (Abeta) into amyloid plaques is one of the invariant neuropathological features of Alzheimer's disease. Proteins that codeposit with Abeta are potentially important for the pathogenesis, and a recently discovered plaque-associated protein is the collagenous Alzheimer amyloid plaque c...

journal_title：Biochemistry

authors： Kakuyama H,Söderberg L,Horigome K,Winblad B,Dahlqvist C,Näslund J,Tjernberg LO

更新日期：2005-11-29 00:00:00

abstract：:In a large number of plant species hydroxynitrile lyases catalyze the decomposition of cyanohydrins in order to generate hydrogen cyanide upon tissue damage. Hydrogen cyanide serves as a deterrent against herbivores and fungi. In vitro hydroxynitrile lyases are proficient biocatalysts for the stereospecific synthesis ...

journal_title：Biochemistry

authors： Dreveny I,Andryushkova AS,Glieder A,Gruber K,Kratky C

更新日期：2009-04-21 00:00:00

abstract：:This paper defines the properties of interaction of endothelin-1 (Et-1) with cloned bovine ETA receptors. The Kd value of Et-1/ETA receptor complexes was estimated in membrane preparations to 20 pM using kinetic experiments and saturation experiments performed under quasi equilibrium conditions. Competition experiment...

journal_title：Biochemistry

authors： Desmarets J,Gresser O,Guedin D,Frelin C

更新日期：1996-11-26 00:00:00

abstract：:The selective paramagnetic relaxation of oligonucleotide protons of d(GTGCAC)2 by delta- and lambda-Ni(phen)3(3+) and delta- and lambda-Cr(phen)3(3+) has been examined to obtain some structural insight into the noncovalent binding of tris(phenanthroline) metal complexes to DNA. The experiments demonstrate that the rel...

journal_title：Biochemistry

authors： Rehmann JP,Barton JK

更新日期：1990-02-20 00:00:00

abstract：:The mammalian HIRA/UBN1/CABIN1/ASF1a (HUCA) histone chaperone complex deposits the histone H3 variant H3.3 into chromatin and is linked to gene activation, repression, and chromatin assembly in diverse cell contexts. We recently reported that a short N-terminal fragment of UBN1 containing amino acids 1-175 is necessar...

journal_title：Biochemistry

authors： Tang Y,Puri A,Ricketts MD,Rai TS,Hoffmann J,Hoi E,Adams PD,Schultz DC,Marmorstein R

更新日期：2012-03-27 00:00:00

abstract：:Caveolae are approximately 50-100 nm invaginations of the plasma membrane thought to form as a result of a local accumulation of cholesterol, sphingolipids, and a unique family of three proteins known as the caveolins: Cav-1, -2, and -3. Here, we report the identification, sequence, and developmental expression of the...

journal_title：Biochemistry

authors： Razani B,Park DS,Miyanaga Y,Ghatpande A,Cohen J,Wang XB,Scherer PE,Evans T,Lisanti MP

更新日期：2002-06-25 00:00:00

abstract：:Low-temperature Fourier transform infrared spectroscopy has been used to study mutants of Glu194 and Glu204, two amino acids that are involved in proton release to the extracellular side of bacteriorhodopsin. Difference spectra of films of E194Q, E204Q, E194Q/E204Q, E9Q/E194Q/E204Q, and E9Q/E74Q/E194Q/E204Q at 243, 27...

journal_title：Biochemistry

authors： Lazarova T,Sanz C,Sepulcre F,Querol E,Padrós E

更新日期：2002-06-25 00:00:00

abstract：:The photochemical intermediate metarhodopsin II (meta II; lambda max = 380 nm) is generally identified with rho*, the conformation of photolyzed rhodopsin which binds and activates the visual G-protein, Gt [Emeis, D., & Hoffman, K.P. (1981) FEBS Lett. 136, 201-207]. Purified bovine rhodopsin was incorporated into vesi...

journal_title：Biochemistry

authors： Mitchell DC,Kibelbek J,Litman BJ

更新日期：1991-01-08 00:00:00

abstract：:Vibrational Raman spectroscopic experiments have been performed as a function of temperature on aqueous dispersions of synthetic DL-erythro-N-lignoceroylsphingosylphosphocholine [C(24):SPM], a racemic mixture of two highly asymmetric hydrocarbon chain length sphingomyelins. Raman spectral peak-height intensity ratios ...

journal_title：Biochemistry

authors： Levin IW,Thompson TE,Barenholz Y,Huang C

更新日期：1985-10-22 00:00:00

abstract：:The interaction between the bacteriophage Q beta coat protein and its specific binding site on Q beta genomic RNA was characterized by using a nitrocellulose filter binding assay. Q beta coat protein bound to a synthetic 29-nucleotide RNA hairpin with an association constant of 400 microM-1 at 4 degrees C, 0.2 M ionic...

journal_title：Biochemistry

authors： Witherell GW,Uhlenbeck OC

更新日期：1989-01-10 00:00:00

abstract：:Kinetic studies of the effect of addition of Co2+ or Mn2+ to a highly purified dipeptidase from Ehrlich-Lettré mouse ascites tumor cells show that these metals specifically activate the hydrolyses of certain classes of dipeptides. This enzyme was previously (S. Hayman and E. K. Patterson, 1971, J. Biol. Chem. 246, 660...

journal_title：Biochemistry

authors： Patterson EK,Gatmaitan JS,Hayman S

更新日期：1975-09-23 00:00:00

abstract：:We have characterized a membrane protein containing residues P688-T762 of the integrin beta3 subunit, encompassing its transmembrane and cytoplasmic domains, by nuclear magnetic resonance spectroscopy. Under conditions in which it is monomeric in dodecylphosphocholine micelles, the protein consists mainly of alpha-hel...

journal_title：Biochemistry

authors： Li R,Babu CR,Valentine K,Lear JD,Wand AJ,Bennett JS,DeGrado WF

更新日期：2002-12-31 00:00:00

abstract：:X-ray crystal structures of enzyme-ligand complexes are widely believed to mimic states in the catalytic cycle, but this presumption has seldom been carefully scrutinized. In the case of Tritrichomonas foetus inosine 5'-monophosphate dehydrogenase (IMPDH), 10 structures of various enzyme-substrate-inhibitor complexes ...

journal_title：Biochemistry

authors： Josephine HR,Ravichandran KR,Hedstrom L

更新日期：2010-12-21 00:00:00

abstract：:Introduction of specific structural probes into substrate binding sites of Escherichia coli glutamine synthetase is now possible. Various analogues of ATP substituted with an amino or sulfhydryl moiety at the 6- or 8-position of the purine ring have been found to substitute for ATP in the autoinactivation reaction of ...

journal_title：Biochemistry

authors： Maurizi MR,Ginsburg A

更新日期：1986-01-14 00:00:00

abstract：:DNA topoisomerase II is believed to be the enzyme that produces the protein-associated DNA strand breaks observed in mammalian cell nuclei treated with various intercalating agents. Two intercalators--4'-(9-acridinylamino)methanesulfon-m-anisidide (m-AMSA, amsacrine) and 2-methyl-9-hydroxyellipticinium (2-Me-9-OH-E+)-...

journal_title：Biochemistry

authors： Pommier Y,Minford JK,Schwartz RE,Zwelling LA,Kohn KW

更新日期：1985-11-05 00:00:00