One-step purification of Actinoplanes missouriensis D-xylose isomerase by high-performance immobilized copper-affinity chromatography: functional analysis of surface histidine residues by site-directed mutagenesis.

abstract：:The homeodomain proteins a1 and alpha 2 act cooperatively to regulate cell type specific genes in yeast. The basis of the cooperativity is a weak interaction between the two proteins which forms heterodimers that bind DNA tightly and specifically. In this paper, we examine the mechanism of heterodimerization. We show ...

journal_title：Biochemistry

authors： Phillips CL,Stark MR,Johnson AD,Dahlquist FW

更新日期：1994-08-09 00:00:00

abstract：:In investigating the agonist binding site of the human brain cholecystokininB receptor (CCKBR), we employed the direct protein chemical approach using a photoreactive tritiated analogue of sulfated cholecystokinin octapeptide, which contains the p-benzoylbenzoyl moiety at the N-terminus, followed by purification of th...

journal_title：Biochemistry

authors： Anders J,Blüggel M,Meyer HE,Kühne R,ter Laak AM,Kojro E,Fahrenholz F

更新日期：1999-05-11 00:00:00

abstract：:The thermodynamic parameters characterizing the interaction between rabbit fast skeletal muscle troponin and tropomyosin have been determined at 25 degrees C for three solution conditions: buffer containing (A) 1 mM CaCl2, simulating a "turned-on" state, (B) 3 mM MgCl2, simulating a "turned-off" state, and (C) 2 mM et...

journal_title：Biochemistry

authors： Ingraham RH,Swenson CA

更新日期：1985-09-10 00:00:00

abstract：:Two thiol-activated endopeptidases with pH optima near pH 7.5 were isolated from the supernatant fraction of rabbit brain homogenates by DEAE-cellulose chromatography, gel filtration and isoelectrofocusing. Peptide bond hydrolysis was measured quantitatively by ion-exchange chromatography with an amino acid analyzer. ...

journal_title：Biochemistry

authors： Oliveira EB,Martins AR,Camargo AC

更新日期：1976-05-04 00:00:00

abstract：:Glutaraldehyde treatment of electroplax membrane preparations of Na,K-ATPase leads to irreversible changes in the enzymic behavior of the protein, which are not due to modification of the active site. When the glutaraldehyde treatment is carried out in a medium containing K+ and without Na+, the "K+-modified enzyme" s...

journal_title：Biochemistry

authors： Chipman DM,Lev A

更新日期：1983-09-13 00:00:00

abstract：:The neutron structure of subtilisin BPN' has been refined and analyzed at 2.0-A resolution. The structure studied was a mutant variant of subtilisin, Met222----Gln, and was used because large, uninhibited crystals could be grown, which was not the case for the native molecule. Comparison of the structure with that of ...

journal_title：Biochemistry

authors： Kossiakoff AA,Ultsch M,White S,Eigenbrot C

更新日期：1991-02-05 00:00:00

abstract：:Nucleosome assembly proteins (Naps) influence chromatin dynamics by directly binding to histones. Here we provide a comprehensive structural and biochemical analysis of a Nap protein from Caenorhabditis elegans (CeNap1). CeNap1 naturally lacks the acidic N-terminal tail and has a short C-terminal tail compared to many...

journal_title：Biochemistry

authors： Sarkar P,Zhang N,Bhattacharyya S,Salvador K,D'Arcy S

更新日期：2019-01-15 00:00:00

abstract：:Cholesterol and its hemisuccinate and sulfate derivatives are widely used in studies of purified membrane proteins but are difficult to solubilize in aqueous solution, even in the presence of detergent micelles. Other cholesterol derivatives do not form conventional micelles and lead to viscous solutions. To address t...

journal_title：Biochemistry

authors： Howell SC,Mittal R,Huang L,Travis B,Breyer RM,Sanders CR

更新日期：2010-11-09 00:00:00

abstract：:Aminoglycoside 2''-phosphotransferase IVa [APH(2'')-IVa] is a member of a family of bacterial enzymes responsible for medically relevant resistance to antibiotics. APH(2'')-IVa confers high-level resistance against several clinically used aminoglycoside antibiotics in various pathogenic Enterococcus species by phospho...

journal_title：Biochemistry

authors： Shi K,Houston DR,Berghuis AM

更新日期：2011-07-19 00:00:00

abstract：:We have studied the tridecadeoxynucleotide CGCGAATTACGCG (I), which contains an additional A at position 9 compared to the dodecanucleotide of which the crystal structure has been determined. Sequence I exhibits no distinct melting curve and also has a concentration-dependent pattern of peaks on reverse-phase chromato...

journal_title：Biochemistry

authors： Roy S,Weinstein S,Borah B,Nickol J,Appella E,Sussman JL,Miller M,Shindo H,Cohen JS

更新日期：1986-11-18 00:00:00

abstract：:The ZFY protein is a member of one of the most interesting classes of polydactyl zinc finger proteins. It has a domain of 13 tandem zinc fingers that is organized with an internal repeat of odd-even finger pairs. It has been proposed that each finger pair interacts with six base pairs within a turn of the double helix...

journal_title：Biochemistry

authors： Grants J,Flanagan E,Yee A,Romaniuk PJ

更新日期：2010-02-02 00:00:00

abstract：:The interactions of HIV-1 Env (gp120-gp41) with CD4 and coreceptors trigger a barrage of conformational changes in Env that drive the membrane fusion process. Various regions of gp41 have profound effects on HIV entry and budding. However, the precise interactions between gp41 and the membrane have not been elucidated...

journal_title：Biochemistry

authors： Viard M,Ablan SD,Zhou M,Veenstra TD,Freed EO,Raviv Y,Blumenthal R

更新日期：2008-02-19 00:00:00

abstract：:Utilizing structure-based design, we have previously demonstrated that it is possible to obtain selective inhibitors of protein-tyrosine phosphatase 1B (PTP1B). A basic nitrogen was introduced into a general PTP inhibitor to form a salt bridge to Asp48 in PTP1B and simultaneously cause repulsion in PTPs containing an ...

journal_title：Biochemistry

authors： Iversen LF,Andersen HS,Møller KB,Olsen OH,Peters GH,Branner S,Mortensen SB,Hansen TK,Lau J,Ge Y,Holsworth DD,Newman MJ,Hundahl Møller NP

更新日期：2001-12-11 00:00:00

abstract：:The folding of the two-domain bacterial chaperone PapD has been studied to develop an understanding of the relationship between individual domain folding and the formation of domain-domain interactions. PapD contains six phenylalanine residues, four in the N-terminal domain and two in the C-terminal domain. To examine...

journal_title：Biochemistry

authors： Bann JG,Frieden C

更新日期：2004-11-02 00:00:00

abstract：:The structure and dynamic properties of the C-terminal region of the human class alpha glutathione transferase A1-1 have been investigated with high-resolution NMR methods. On the basis of crystallographic and fluorescence measurements, this 13-residue segment of the enzyme is presumed to be disordered in the unligand...

journal_title：Biochemistry

authors： Zhan Y,Rule GS

更新日期：2004-06-15 00:00:00

abstract：:Papain-solubilized human class II (HLA-DR) antigens have been purified from cadaveric spleens by ion-exchange chromatography, gel chromatography, and immunosorbent purification. The isolated papain-solubilized antigens comprised two subunits with apparent molecular weights of 23 000 and 30 000, respectively. The circu...

journal_title：Biochemistry

authors： Wiman K,Claesson L,Rask L,Trägårdh L,Peterson PA

更新日期：1982-10-12 00:00:00

abstract：:The contribution of ligand dynamics to CYP allosterism has not been considered in detail. On the basis of a previous study, we hypothesized that CYP2A6 and CYP2E1 accommodate multiple xylene ligands. As a result, the intramolecular ( k H/ k D) obs values observed for some xylene isomers are expected to be dependent on...

journal_title：Biochemistry

authors： Harrelson JP,Atkins WM,Nelson SD

更新日期：2008-03-04 00:00:00

abstract：:Human and mouse metallothionein-3 (MT-3) molecules exhibit the same metal binding stoichiometry with Zn(II), Cd(II), or Cu(I) as MT-1 or MT-2 molecules, suggesting that MT-3 consists of two domains enfolding separate polymetallic clusters. The kinetic reactivities of Zn(II) complexes of MT-3 with the chelator ethylene...

journal_title：Biochemistry

authors： Sewell AK,Jensen LT,Erickson JC,Palmiter RD,Winge DR

更新日期：1995-04-11 00:00:00

abstract：:Ran, a small nuclear GTP-binding protein, is one of the most abundant Ras-related proteins in eucaryotic cells. Ran is essential for nucleo-cytoplasmatic transport and is primarily localized in the nucleus and at the nuclear pore complex. Here, we characterize the kinetics and equilibrium of the interaction between Ra...

journal_title：Biochemistry

authors： Kuhlmann J,Macara I,Wittinghofer A

更新日期：1997-10-07 00:00:00

abstract：:Arginase is a binuclear Mn(2+) metalloenzyme that catalyzes the hydrolysis of L-arginine to L-ornithine and urea. X-ray crystal structures of arginase complexed to substrate analogues N(omega)-hydroxy-L-arginine and N(omega)-hydroxy-nor-L-arginine, as well as the products L-ornithine and urea, complete a set of struct...

journal_title：Biochemistry

authors： Cox JD,Cama E,Colleluori DM,Pethe S,Boucher JL,Mansuy D,Ash DE,Christianson DW

更新日期：2001-03-06 00:00:00

abstract：:Penicillin-binding protein 5 (PBP 5) from Escherichia coli is a well-characterized d-alanine carboxypeptidase that serves as a prototypical enzyme to elucidate the structure, function, and catalytic mechanism of PBPs. A comprehensive understanding of the catalytic mechanism underlying d-alanine carboxypeptidation and ...

journal_title：Biochemistry

authors： Nicola G,Peddi S,Stefanova M,Nicholas RA,Gutheil WG,Davies C

更新日期：2005-06-14 00:00:00

abstract：:The genome of all retroviruses consists of two identical RNAs noncovalently linked near their 5' end. Dimerization of genomic RNA is thought to modulate several steps in the retroviral life cycle, such as recombination, translation, and encapsidation. The kissing-loop model of HIV-1 genome dimerization [Laughrea, M., ...

journal_title：Biochemistry

authors： Laughrea M,Jetté L

更新日期：1996-02-06 00:00:00

abstract：:Although the binding of various forms of bleomycin to DNA has been studied extensively, the transient nature of the activated bleomycin species which ultimately attacks DNA has largely precluded direct examination of its physical interactions with DNA. In an attempt to map the minimum binding site required for this sp...

journal_title：Biochemistry

authors： Suh D,Povirk LF

更新日期：1997-04-08 00:00:00

abstract：:In bacteria, the transcription of virulence genes is usually controlled by a cell density-dependent process known as "quorum sensing" (QS). QS relies on small diffusible signaling molecules that cross the bacterial cell wall and activate target transcription factors after a threshold concentration has been reached. Be...

journal_title：Biochemistry

authors： Yu S,Jensen V,Seeliger J,Feldmann I,Weber S,Schleicher E,Häussler S,Blankenfeldt W

更新日期：2009-11-03 00:00:00

abstract：:Progressive cerebral amyloid beta-protein (A beta) deposition is believed to play a central role in the pathogenesis of Alzheimer's disease (AD). Elevated levels of A beta(42) peptide formation have been linked to early-onset familial AD-causing gene mutations in the amyloid beta-protein precursor (A beta PP) and the ...

journal_title：Biochemistry

authors： Shearman MS,Beher D,Clarke EE,Lewis HD,Harrison T,Hunt P,Nadin A,Smith AL,Stevenson G,Castro JL

更新日期：2000-08-01 00:00:00

abstract：:Measurements of the magnetic field dependence of the longitudinal magnetic relaxation rates (NMRD profiles) of solvent protons and deuterons led to the discovery of two classes of solvent binding sites in Ca2+-Mn2+-concanavalin A (CMPL) [Koenig, S. H., Brown, R. D., III, & Brewer, C. F. (1985) Biochemistry (second of ...

journal_title：Biochemistry

authors： Bhattacharyya L,Brewer CF,Brown RD 3rd,Koenig SH

更新日期：1985-09-10 00:00:00

abstract：:Different sites of the tRNA molecule influence the activity of the elongation factor Tu (EF-Tu) center for GTP hydrolysis [Parlato, G., Pizzano, R., Picone, D., Guesnet, J., Fasano, O., & Parmeggiani, A. (1983) J. Biol. Chem. 258, 995-1000]. Continuing these studies, we have investigated some aspects of (a) the effect...

journal_title：Biochemistry

authors： Swart GW,Parmeggiani A

更新日期：1989-01-10 00:00:00

abstract：:Fluorescent and photoactivatable fluorescent derivatives of tetrodotoxin (TTX) have been synthesized. N-Methylanthraniloylglycine hydrazide, anthraniloyl hydrazide, and 2-azidoanthraniloylglycine hydrazide were coupled to the carbonyl at C6 of oxidized tetrodotoxin to form stable fluorescent hydrazones. The C6 ketone ...

journal_title：Biochemistry

authors： Angelides KJ

更新日期：1981-07-07 00:00:00

abstract：:The binding of various forms of vanadate to myosin and myosin subfragment 1 (S-1) was studied by 51V NMR at increasing vanadate concentrations between 0.06 and 1.0 mM. The distribution of the various forms of vanadate in the solution depended on the total concentration of vanadate. At low concentrations, the predomina...

journal_title：Biochemistry

authors： Ringel I,Peyser YM,Muhlrad A

更新日期：1990-09-25 00:00:00

abstract：:Identification of the kinetic intermediates in GTP hydrolysis on microtubules and characterization of their assembly properties is essential in understanding microtubule dynamics. By using an improved glass filter assay that selectively traps microtubules with a dead time of 2 s and monitoring taxol-induced rapid asse...

journal_title：Biochemistry

authors： Melki R,Carlier MF,Pantaloni D

更新日期：1990-09-25 00:00:00