Basic proline-rich proteins from human parotid saliva: complete covalent structures of proteins IB-1 and IB-6.

abstract：:Oligomers of amyloid-β (Aβ) have emerged as the primary toxic agents responsible for early synaptic dysfunction and neuronal death in Alzheimer's disease (AD). Characterization of oligomers is an important step in the progress toward delineating the complex molecular mechanisms involved in AD pathogenesis. In our prev...

journal_title：Biochemistry

authors： Dean DN,Pate KM,Moss MA,Rangachari V

更新日期：2016-04-19 00:00:00

abstract：:D(--)-beta-Hydroxybutyrate dehydrogenase of beef heart mitochondria is inhibited by modifiers of disulfides, thiols, and vicinal dithiols [Phelps, D. C., & Hatefi, Y. (1981) Biochemistry 20 (preceding paper in this issue)]. The vicinal dithiol can be reversibly oxidized by diamide, resulting in activity inhibition, an...

journal_title：Biochemistry

authors： Phelps DC,Hatefi Y

更新日期：1981-02-03 00:00:00

abstract：:Calcium trapped within sonicated and resealed bovine rod outer segment disks is released upon light exposure with a stoichiometry of 0.75 +/- 0.05 calcium for each rhodopsin bleached. The amount of calcium liberated is proportional to the amount of bleaching in the range of 20 to 100% bleaching and is relatively insen...

journal_title：Biochemistry

authors： Smith HG Jr,Fager RS,Litman RJ

更新日期：1977-04-05 00:00:00

abstract：:Protein flexibility is thought to play key roles in numerous biological processes, including antibody affinity maturation, signal transduction, and enzyme catalysis, yet only limited information is available regarding the molecular details linking protein dynamics with function. A single point mutation at the distal s...

journal_title：Biochemistry

authors： Grossman M,Tworowski D,Dym O,Lee MH,Levy Y,Murphy G,Sagi I

更新日期：2010-07-27 00:00:00

abstract：:Porcine pancreatic phospholipase A2 interacts with micelles of the substrate analogue n-octadecylphosphocholine to form a specific complex over considerably wide concentration ranges of both lipid and protein. UV absorption difference spectroscopy measurements indicate that the ratio of lipid to protein molecules in t...

journal_title：Biochemistry

authors： Hille JD,Donné-Op den Kelder GM,Sauve P,de Haas GH,Egmond MR

更新日期：1981-07-07 00:00:00

abstract：:A method to identify poly(L-proline)-type (PII) conformation in crystal structures of globular proteins is presented. Short segments of PII structure were identified in globular protein structures, and these form a significant fraction of the residues which are not assigned to alpha-helix, beta-sheet, and beta-turns. ...

journal_title：Biochemistry

authors： Sreerama N,Woody RW

更新日期：1994-08-23 00:00:00

abstract：:In an effort to further probe metal binding to metallo-beta-lactamase L1 (mbetal L1), Cu- (Cu-L1) and Ni-substituted (Ni-L1) L1 were prepared and characterized by kinetic and spectroscopic studies. Cu-L1 bound 1.7 equiv of Cu and small amounts of Zn(II) and Fe. The EPR spectrum of Cu-L1 exhibited two overlapping, axia...

journal_title：Biochemistry

authors： Hu Z,Spadafora LJ,Hajdin CE,Bennett B,Crowder MW

更新日期：2009-04-07 00:00:00

abstract：:To date, little work has been conducted on the relationship between solute and buffer molecules and conformational exchange motion in enzymes. This study uses solution NMR to examine the effects of phosphate, sulfate, and acetate in comparison to MES- and HEPES-buffered references on the chemical shift perturbation an...

journal_title：Biochemistry

authors： Wong M,Khirich G,Loria JP

更新日期：2013-09-17 00:00:00

abstract：:Using proton magnetic resonance, we have investigated imino and amino proton exchange in the Z form of the four oligomers d(Cbr8GCGCbr8G), d(CGm5CGCG), d(CG)6, and d(CG)12. In the latter two oligomers, all five exchangeable protons have been assigned. We find that proton acceptors such as NH3 or the basic form of Tris...

journal_title：Biochemistry

authors： Kochoyan M,Leroy JL,Guéron M

更新日期：1990-05-22 00:00:00

abstract：:The human intestinal Caco-2 cell line, described as enterocyte-like in a number of studies, was examined for its ability to carry out the metabolism of vitamin A normally required in the absorptive process. Caco-2 cells contained cellular retinol-binding protein II, a protein which is abundant in human villus-associat...

journal_title：Biochemistry

authors： Quick TC,Ong DE

更新日期：1990-12-18 00:00:00

abstract：:MerR, the metalloregulator of the mercury resistance (mer) operon, binds the operator (merO)between -10 and -35 of the merTPCAD promoter (PT) and sequesters RNA polymerase (RNAP) in a closed complex. MerR represses PT until Hg(II) induces it to underwind merO DNA and thus facilitate open complex formation. We used cro...

journal_title：Biochemistry

authors： Kulkarni RD,Summers AO

更新日期：1999-03-16 00:00:00

abstract：:Purine C-8 tritium-labeling rates have been measured at specific sites in Escherichia coli tRNAIle and tRNA2Tyr. The results are compared with those obtained for yeast tRNAPhe (preceding paper(Gamble et al., 1976)). The tRNAIle and tRNAPhe fall into the same general class of tRNA structures, while tRNA2Tyr is in a dif...

journal_title：Biochemistry

authors： Schoemaker HJ,Gamble RC

更新日期：1976-06-29 00:00:00

abstract：:Deuterium NMR has been used to investigate the structure and dynamic state of cytochrome c complexed with bilayers of cardiolipin. Reductive methylation was employed to prepare [N epsilon, N epsilon-C2H3]lysyl cytochrome c, and deuterium exchange provided labeling of backbone sites to give [amide-2H]cytochrome c or mo...

journal_title：Biochemistry

authors： Spooner PJ,Watts A

更新日期：1991-04-23 00:00:00

abstract：:Organophosphate flame retardants are used to inhibit combustion and increase plasticity in plastics and durable foams. While not neurotoxic, these compounds are potential carcinogens, endocrine disrupters, and developmental toxins. The phosphotriesterase from Sphingobium sp. TCM1 (Sb-PTE) is unique among phosphotriest...

journal_title：Biochemistry

authors： Bigley AN,Narindoshvili T,Xiang DF,Raushel FM

更新日期：2020-03-31 00:00:00

abstract：:Antifreeze proteins lower the freezing point of their solution by binding to ice and inhibiting its growth. One of several structurally different antifreeze proteins in fishes (type II) is homologous to the carbohydrate-recognition domain of Ca2+-dependent lectins and adopts the same three-dimensional fold. Type II an...

journal_title：Biochemistry

authors： Loewen MC,Gronwald W,Sönnichsen FD,Sykes BD,Davies PL

更新日期：1998-12-22 00:00:00

abstract：:The backbone dynamics of Escherichia coli ribonuclease HI (RNase HI) in the picosecond to nanosecond time scale were characterized by a combination of measurements of 15N-NMR relaxation (T1, T2, and NOE), analyzed by a model-free approach, and molecular dynamics (MD) simulation in water. The MD simulations in water we...

journal_title：Biochemistry

authors： Yamasaki K,Saito M,Oobatake M,Kanaya S

更新日期：1995-05-23 00:00:00

abstract：:Fluid-phase interactions between hematologic cells and those of the vessel wall were studied in order to define a role for lipoxygenase products as cell signals in the control of vascular cholesterol metabolism. A functional parameter for hydroxy acids in this system has not been previously demonstrated. We report her...

journal_title：Biochemistry

authors： Hajjar DP,Marcus AJ,Etingin OR

更新日期：1989-10-31 00:00:00

abstract：:Phosphorylation of phosphatidylinositol (PtdIns) by PtdIns 4-kinases is the first step in the synthesis of polyphosphoinositides, the lipid precursors of intracellular signaling molecules. We have recently identified a cytosolic PtdIns 4-kinase (cPI4K) in the bovine adrenal cortex that is distinguished from previously...

journal_title：Biochemistry

authors： Downing GJ,Kim S,Nakanishi S,Catt KJ,Balla T

更新日期：1996-03-19 00:00:00

abstract：:Pineapple stem bromelain was photooxidized in the presence of Methylene Blue used as a sensitizer. The essential sulfhydryl group of the enzyme protein rapidly became inaccessible to react with 5,5'-dithiobis(nitrobenzoic acid), but the reactivity was readily regained to the original level upon treatment with dithioth...

journal_title：Biochemistry

authors： Murachi T,Tsudzuki T,Okumura K

更新日期：1975-01-28 00:00:00

abstract：:A 150-kDa DNA-dependent ATPase composed of 83/68-kDa subunits was previously reported to cofractionate with a 21S complex of enzymes for DNA synthesis from HeLa cells (Vishwanatha, J. K., & Baril, E. F. (1990) Biochemistry 29, 8753-8759). The DNA-dependent ATPase was purified to electrophoretic homogeneity from a HeLa...

journal_title：Biochemistry

authors： Cao QP,Pitt S,Leszyk J,Baril EF

更新日期：1994-07-19 00:00:00

abstract：:Mdm2 negatively regulates p53 by inhibiting its transcriptional activity and promoting its degradation by functioning as an E3 ubiquitin ligase. The primary p53 binding site on mdm2 is located in its N-terminal domain. Through binding to p53 at its N-terminal transactivation domain, mdm2 directly blocks the transcript...

journal_title：Biochemistry

authors： Ma J,Martin JD,Zhang H,Auger KR,Ho TF,Kirkpatrick RB,Grooms MH,Johanson KO,Tummino PJ,Copeland RA,Lai Z

更新日期：2006-08-01 00:00:00

abstract：:Halorhodopsin from Natronomonas pharaonis (NpHR) acts an inward-directed, light-driven chloride pump and forms a homotrimer. To evaluate effect of trimeric assembly, that is, intermolecular interaction, on the control or modulation of light-driven chloride pumping activity of individual HRs, it is important to underst...

journal_title：Biochemistry

authors： Sasaki T,Aizawa T,Kamiya M,Kikukawa T,Kawano K,Kamo N,Demura M

更新日期：2009-12-29 00:00:00

abstract：:C4'-oxidized (C4-AP) and C5'-oxidized abasic sites (DOB) that are produced following abstraction of a hydrogen atom from the DNA backbone reversibly form cross-links selectively with dA opposite a 3'-adjacent nucleotide, despite the comparable proximity of an opposing dA. A previous report on UvrABC incision of DNA su...

journal_title：Biochemistry

authors： Ghosh S,Greenberg MM

更新日期：2015-10-13 00:00:00

abstract：:Deamidation of proteins is one of the most prevalent post-translational modifications found upon aging, and in age-onset diseases. Specific asparagine and glutamine residues are often selectively deamidated during this process. In the human lens, deamidation has been shown to occur in many crystallins, but it is not c...

journal_title：Biochemistry

authors： Pande A,Mokhor N,Pande J

更新日期：2015-08-11 00:00:00

abstract：:Three methods, fluorescence anisotropy of rhodamine-labeled profilin, intrinsic fluorescence and nucleotide exchange, give the same affinity, Kd = 0.1 microM, for Acanthamoeba profilins binding amoeba actin monomers with bound Mg-ATP. Replacement of serine 38 with cysteine created a unique site where labeling with rho...

journal_title：Biochemistry

authors： Vinson VK,De La Cruz EM,Higgs HN,Pollard TD

更新日期：1998-08-04 00:00:00

abstract：:In eukaryotes, a major route for ATP-dependent protein breakdown proceeds through covalent intermediates of target proteins destined for degradation and the highly conserved, 76 amino acid protein ubiquitin. In rabbit reticulocytes, it has been shown that hemin effectively inhibits this pathway by blocking the catabol...

journal_title：Biochemistry

authors： Vierstra RD,Sullivan ML

更新日期：1988-05-03 00:00:00

abstract：:RPE65, a protein expressed in cells of the retinal pigment epithelium of the eye, is essential for the synthesis by isomerohydrolase of 11-cis-retinal, the chromophore of rod and cone opsins. Recent work has established that RPE65 is a retinyl ester binding protein, and as all-trans-retinyl esters are the substrate fo...

journal_title：Biochemistry

authors： Lyubarsky AL,Savchenko AB,Morocco SB,Daniele LL,Redmond TM,Pugh EN Jr

更新日期：2005-07-26 00:00:00

abstract：:A new fluorescent lipid analogue, bimanephosphatidylcholine, has been synthesized for use in lipid bilayers. This probe is well suited as an energy-transfer donor with N-(7-nitro-2,1,3-benzoxadiazol-4-yl)phosphatidylethanolamine as the acceptor. Dimyristoylphosphatidylethanolamine vesicles are prepared by sonication a...

journal_title：Biochemistry

authors： Pryor C,Bridge M,Loew LM

更新日期：1985-04-23 00:00:00

abstract：:Two peptides designed for drug delivery were generated by the combination of a signal peptide with a nuclear localization sequence and are shown to facilitate the cellular internalization of small molecules which are covalently linked to these peptides. In order to understand the mechanism of internalization, the conf...

journal_title：Biochemistry

authors： Chaloin L,Vidal P,Heitz A,Van Mau N,Méry J,Divita G,Heitz F

更新日期：1997-09-16 00:00:00

abstract：:Thermodynamic equilibrium transition models in DSC are only applicable to reversible processes, but reversibility of the thermal transitions of proteins is comparatively rare because of intermolecular aggregation of denatured proteins and the degradation that occurs at high temperatures. The cupredoxin azurin from Pse...

journal_title：Biochemistry

authors： Sandberg A,Leckner J,Shi Y,Schwarz FP,Karlsson BG

更新日期：2002-01-22 00:00:00