One-disulfide intermediates of apamin exhibit native-like structure.

abstract：:An oligodeoxynucleotide containing four thymines and covalently attached to an acridine derivative through its 3'-phosphate [(Tp)4(CH2)5Acr] was synthesized. Its conformation in solution was investigated by proton magnetic resonance. Both intramolecular interactions between the acridine dye and thymines and intermolec...

journal_title：Biochemistry

authors： Lancelot G,Asseline U,Thuong NT,Hélène C

更新日期：1985-05-07 00:00:00

abstract：:A crystal structure of human fibrinogen has been determined at approximately 3.3 A resolution. The protein was purified from human blood plasma, first by a cold ethanol precipitation procedure and then by stepwise chromatography on DEAE-cellulose. A product was obtained that was homogeneous on SDS-polyacrylamide gels....

journal_title：Biochemistry

authors： Kollman JM,Pandi L,Sawaya MR,Riley M,Doolittle RF

更新日期：2009-05-12 00:00:00

abstract：:Recombinant 15N-labeled human interleukin 2 (IL-2) has been studied by 2D and 3D NMR using uniformly 15N-labeled protein. Assignment of the backbone resonances has enabled the secondary structure of the protein to be defined. The secondary structure was found to consist of four alpha-helical regions and a short sectio...

journal_title：Biochemistry

authors： Mott HR,Driscoll PC,Boyd J,Cooke RM,Weir MP,Campbell ID

更新日期：1992-08-25 00:00:00

abstract：:1,3-15N-Labeled uracil was synthesized chemically and used to prepare labeled Escherichia coli tRNA(Val) biosynthetically. 500-MHz measurements of 15N and proton chemical shift were obtained, for all uridine and uridine-related bases, by heteronuclear multiple-quantum coherence spectroscopy. All the uracil NH group re...

journal_title：Biochemistry

authors： Choi BS,Redfield AG

更新日期：1992-12-29 00:00:00

abstract：:Triple helix-forming oligonucleotides (TFOs) bind with high affinity and specificity to homopurine-homopyrimidine sequences in DNA and have been shown to inhibit transcription of target genes in various experimental systems. In the present study, we evaluated the ability of 3'-amino-modified phosphodiester TFOs direct...

journal_title：Biochemistry

authors： Catapano CV,McGuffie EM,Pacheco D,Carbone GM

更新日期：2000-05-02 00:00:00

abstract：:The reaction catalyzed by orotidine 5'-monophosphate decarboxylase (OMPDC) is accompanied by exceptional values for rate enhancement (k(cat)/k(non) = 7.1 × 10(16)) and catalytic proficiency [(k(cat)/K(M))/k(non) = 4.8 × 10(22) M(-1)]. Although a stabilized vinyl carbanion/carbene intermediate is located on the reactio...

journal_title：Biochemistry

authors： Iiams V,Desai BJ,Fedorov AA,Fedorov EV,Almo SC,Gerlt JA

更新日期：2011-10-04 00:00:00

abstract：:Escherichia coli (A)BC excinuclease is the major enzyme responsible for removing bulky adducts, such as pyrimidine dimers and 6-4 photoproducts, from DNA. Mutants deficient in this enzyme are extremely sensitive to UV and UV-mimetic agents, but not to oxidizing agents, or ionizing radiation which damages DNA in part b...

journal_title：Biochemistry

authors： Lin JJ,Sancar A

更新日期：1989-10-03 00:00:00

abstract：:Slow conformational changes have been proposed to be responsible for the kinetic positive cooperativity of glucokinase (GK) with glucose. Induced-fit and preexisting equilibrium kinetic models have been previously suggested. In the present study, equilibrium and pre-steady-state fluorescence spectroscopy has been used...

journal_title：Biochemistry

authors： Antoine M,Boutin JA,Ferry G

更新日期：2009-06-16 00:00:00

abstract：:NMR spectroscopic experiments were performed to study the structure of synthetic peptides identical to two extracellular regions of the human thrombin receptor. The smaller molecule, comprising 14 amino acids, was biologically active and was equivalent to the "tethered ligand" exposed after cleavage of the receptor by...

journal_title：Biochemistry

authors： Smith KJ,Trayer IP,Grand RJ

更新日期：1994-05-24 00:00:00

abstract：:We found that peroxisomal lignoceroyl-CoA ligase, like palmitoyl-CoA ligase, is present in the peroxisomal membrane whereas the peroxisomal beta-oxidation enzyme system is localized in the matrix. To further define the role of peroxisomal acyl-CoA ligases (membrane component) in providing acyl-CoA for peroxisomal beta...

journal_title：Biochemistry

authors： Lazo O,Contreras M,Singh I

更新日期：1990-04-24 00:00:00

abstract：:In this work we modeled the circular dichroism (CD) spectrum of LHCII, the main light harvesting antenna of photosystem II of higher plants. Excitonic calculations are performed for a monomeric subunit, taken from the crystal structure of trimeric LHCII from spinach [Liu, Z. F., Yan, H. C., Wang, K. B., Kuang, T. Y., ...

journal_title：Biochemistry

authors： Georgakopoulou S,van der Zwan G,Bassi R,van Grondelle R,van Amerongen H,Croce R

更新日期：2007-04-24 00:00:00

abstract：:Multiple intracellular receptors of the FK506 binding protein (FKBP) family of peptidylprolyl cis/trans-isomerases are potential targets for the immunosuppressive drug FK506. Inhibition of the protein phosphatase calcineurin (CaN), which has been implicated in the FK506-mediated blockade of T cell proliferation, was s...

journal_title：Biochemistry

authors： Weiwad M,Edlich F,Kilka S,Erdmann F,Jarczowski F,Dorn M,Moutty MC,Fischer G

更新日期：2006-12-26 00:00:00

abstract：:Tetraheme cytochromes involved in photosynthetic electron transport have previously been described associated with the reaction centers of purple photosynthetic bacteria; however, similar heme proteins have not until now been characterized in the phylogenetically distinct green sulfur bacteria. In this paper we descri...

journal_title：Biochemistry

authors： Albouy D,Sturgis JN,Feiler U,Nitschke W,Robert B

更新日期：1997-02-18 00:00:00

abstract：:Pepsin, a gastric aspartic proteinase, is a zymogen-derived protein that undergoes irreversible alkaline denaturation at pH 6-7. Detailed knowledge of the structure of the alkaline-denatured state is an important step in understanding the mechanism of the formation of the active enzyme. An extensive analysis of the de...

journal_title：Biochemistry

authors： Konno T,Kamatari YO,Tanaka N,Kamikubo H,Dobson CM,Nagayama K

更新日期：2000-04-11 00:00:00

abstract：:Ppr from the purple phototrophic bacterium, Rhodospirillum centenum (also known as Rhodocista centenaria), is a hybrid of photoactive yellow protein (PYP), bacteriophytochrome (Bph), and histidine kinase (HK) domains. The holo-Ppr (containing both chromophores) exhibits characteristic absorption maxima at 435 nm due t...

journal_title：Biochemistry

authors： Kyndt JA,Fitch JC,Meyer TE,Cusanovich MA

更新日期：2007-07-17 00:00:00

abstract：:Under suitable experimental conditions the aerobic oxidation of NADH catalyzed by horseradish peroxidase occurred in four characteristic phases: initial burst, induction phase, steady state, and termination. A trace amount of H2O2 present in the NADH solution brought about initial burst in the formation of oxyperoxida...

journal_title：Biochemistry

authors： Yokota K,Yamazaki I

更新日期：1977-05-03 00:00:00

abstract：:The role of the C-domain sites of cardiac troponin C in the modulation of the calcium signal remains unclear. In this study, we investigated the effects of hypertrophic cardiomyopathy-linked mutations A8V, E134D, and D145E in cardiac troponin C on the properties of the C-domain sites. The A8V mutation had essentially ...

journal_title：Biochemistry

authors： Swindle N,Tikunova SB

更新日期：2010-06-15 00:00:00

abstract：:Restrictocin and related fungal endoribonucleases from the α-sarcin family site-specifically cleave the sarcin/ricin loop (SRL) on the ribosome to inhibit translation and ultimately trigger cell death. Previous studies showed that the SRL folds into a bulged-G motif and tetraloop, with restrictocin achieving a specifi...

journal_title：Biochemistry

authors： Plantinga MJ,Korennykh AV,Piccirilli JA,Correll CC

更新日期：2011-04-12 00:00:00

abstract：:The reactivity of aluminum and several other divalent and trivalent metallic cations toward chromatin from rat brain and liver has been investigated. Two criteria are used to determine the relative reactivity of these cations toward chromatin. The first involves the ability of the ions to compact the chromatin fibers ...

journal_title：Biochemistry

authors： Walker PR,LeBlanc J,Sikorska M

更新日期：1989-05-02 00:00:00

abstract：:Human immunodeficiency viruses type 1 and 2 (HIV-1 and HIV-2, respectively) exhibit extensive genetic variations. It was postulated that much of this genetic variability stems from the low fidelity of the reverse transcription step. Both HIV reverse transcriptases (RTs) were shown to be particularly error-prone during...

journal_title：Biochemistry

authors： Bakhanashvili M,Hizi A

更新日期：1992-10-06 00:00:00

abstract：:The interaction of insulin with its receptor is complex. Kinetic and equilibrium binding studies suggest coexistence of high- and low-affinity binding sites or negative cooperativity. These phenomena and high-affinity interactions are dependent on the dimeric structure of the receptor. Structure-function studies of in...

journal_title：Biochemistry

authors： Whittaker L,Hao C,Fu W,Whittaker J

更新日期：2008-12-02 00:00:00

abstract：:The first structure of a glycerol kinase from a Gram-positive organism, Enterococcus casseliflavus, has been determined to 2.8 A resolution in the presence of glycerol and to 2.5 A resolution in the absence of substrate. The substrate-induced closure of 7 degrees is significantly smaller than that reported for hexokin...

journal_title：Biochemistry

authors： Yeh JI,Charrier V,Paulo J,Hou L,Darbon E,Claiborne A,Hol WG,Deutscher J

更新日期：2004-01-20 00:00:00

abstract：:The interaction of linker histone H1 with both linear and superhelical double-stranded DNA has been investigated at low ionic strengths. Gel mobility retardation experiments demonstrate strikingly different behavior for the two forms of DNA. First, the experiments strongly suggest that linker histone binds to superhel...

journal_title：Biochemistry

authors： Ellen TP,van Holde KE

更新日期：2004-06-22 00:00:00

abstract：:This paper provides further characterization of a receptor that, in cells lacking the LDL receptor (FH fibroblasts), mediates lipoprotein binding, uptake, and degradation when incubated with oleate at concentrations not exceeding albumin binding capacity. This oleate-activated receptor is genetically distinct from the...

journal_title：Biochemistry

authors： Yen FT,Mann CJ,Guermani LM,Hannouche NF,Hubert N,Hornick CA,Bordeau VN,Agnani G,Bihain BE

更新日期：1994-02-08 00:00:00

abstract：:The iron heme and its immediate environment can provide information that is pivotal to our understanding of the structural and mechanistic features that confer unusual properties to the heme peroxidases. X-ray absorption spectroscopy (XAS), which is ideally suited for the investigation of the local environment and ele...

journal_title：Biochemistry

authors： Sinclair R,Copeland B,Yamazaki I,Powers L

更新日期：1995-10-10 00:00:00

abstract：:HcbA1 is a unique flavoenzyme that catalyzes the first step in the bacterial hexachlorobenzene catabolic pathway. Here we report in vitro reconstitution of the HcbA1-catalyzed reaction. Detailed mechanistic studies provide evidence for nucleophilic aromatic substitution and flavin-N5-oxide formation. ...

journal_title：Biochemistry

authors： Adak S,Begley TP

更新日期：2019-03-05 00:00:00

abstract：:The kinetic mechanism of NADPH-cytochrome P450 oxidoreductase (P450R) has been determined for the model reaction with cytochrome c3+. Although initial velocity studies show parallel patterns, consistent with a classical (one-site) ping-pong mechanism that precludes the formation of a ternary NADPH-P450R-cytochrome c3+...

journal_title：Biochemistry

authors： Sem DS,Kasper CB

更新日期：1994-10-11 00:00:00

abstract：:The 600-MHz proton spectrum of dethiobiotin (prepared from d-biotin with Raney nickel) was measured in order to gain information pertaining to its stereochemical homogeneity. The spectrum demonstrated clearly that the material is a 6:1 mixture of two stereoisomers. The cis compound, corresponding to the stereochemistr...

journal_title：Biochemistry

authors： Hofmann K,Zhang WJ,Romovacek H,Finn FM,Bothner-By AA,Mishra PK

更新日期：1984-06-05 00:00:00

abstract：:Formylglycinamide ribonucleotide amidotransferase (FGAR-AT) catalyzes the ATP- and glutamine-dependent formation of formylglycinamidine ribonucleotide, ADP, P(i), and glutamate in the fourth step of de novo purine biosynthesis. Like all amidotransferases (ATs), FGAR-AT is proposed to channel ammonia between a glutamin...

journal_title：Biochemistry

authors： Hoskins AA,Anand R,Ealick SE,Stubbe J

更新日期：2004-08-17 00:00:00

abstract：:Phosphodeoxyribomutase from Escherichia coli has been purified to homogeneity. Chromatography on DEAE-Sephadex revealed three peaks of enzyme activity, designated form I, form II, and form III. Form III could be further separated into form III-1 and form III-2 by polyacrylamide gel electrophoresis. The four different ...

journal_title：Biochemistry

authors： Leer JC,Hammer-Jespersen K

更新日期：1975-02-11 00:00:00