Site-directed mutagenesis of a predicted cation binding site of Na, K-ATPase.

abstract：:A cross-linked tripeptide has been isolated from alkaline hydrolysates of NaB3H4-reduced calf bone collagen. The peptide contains dihydroxylysinonorleucine, the most abundant cross-link in bone collagen, and it has a single N-terminal proline and a single C-terminal valine. These amino acids are in peptide linkage wit...

journal_title：Biochemistry

authors： Fujii K,Corcoran D,Tanzer ML

更新日期：1975-10-07 00:00:00

abstract：:Whether hydrogen bonds between side chains are energetically significant in proteins and peptides has been controversial. A method is given here for measuring these interactions in peptide helices by comparing the helix contents of peptides with 1, 2, or 3 interactions. Results are given for the glutamine--aspartate (...

journal_title：Biochemistry

authors： Huyghues-Despointes BM,Klingler TM,Baldwin RL

更新日期：1995-10-17 00:00:00

abstract：:Phospholipids and sterols play multiple roles in cells. In addition to establishing barriers between compartments, they also provide the matrix for assembly and function of a large variety of catalytic processes. Lipid composition is a highly regulated feature of biological membranes, yet its implications for membrane...

journal_title：Biochemistry

authors： Autzen HE,Koldsø H,Stansfeld PJ,Gourdon P,Sansom MSP,Nissen P

更新日期：2018-07-17 00:00:00

abstract：:During initiation of minus-strand synthesis by HIV-1 reverse transcriptase, a 3'-DNA-RNA-5' junction is formed involving the 3'-end of tRNAlys,3. The HIV-RT-associated RNase H cleaves the RNA template strand specifically, opposite the newly synthesized DNA strand. We have determined the crystal structure at 1.9 A reso...

journal_title：Biochemistry

authors： Mueller U,Maier G,Mochi Onori A,Cellai L,Heumann H,Heinemann U

更新日期：1998-09-01 00:00:00

abstract：:Extracellular cAMP induces the rapid activation of guanylate cyclase, which adapts within 10 s to constant cAMP concentrations. A new response can be induced either by a higher cAMP concentration or by the same cAMP concentration at some time (t1/2 = 90 s) after removal of the previous stimulus. Stimulation of guanyla...

journal_title：Biochemistry

authors： Van Haastert PJ

更新日期：1987-11-17 00:00:00

abstract：:Serine hydroxymethyltransferase and C1-tetrahydrofolate synthase catalyze four reactions which convert formate and glycine to serine. The one-carbon carrier in these reactions if tetrahydropteroylglutamate which is regenerated in the coupled reaction and thus can be used in catalytic concentrations with respect to ser...

journal_title：Biochemistry

authors： Strong WB,Schirch V

更新日期：1989-11-28 00:00:00

abstract：:The phosphatidylcholine-preferring phospholipase C from Bacillus cereus (PLCBc) is a 28.5 kDa enzyme with three zinc ions in its active site. Although much is known about the roles that various PLCBc active site amino acids play in binding and catalysis, there is little information about the rate-determining step of t...

journal_title：Biochemistry

authors： Martin SF,Hergenrother PJ

更新日期：1999-04-06 00:00:00

abstract：:The light chain of activated factor IX (FIXa) is involved in a number of functional properties, including FIXa enzymatic activity. This suggests the existence of a functional link between the FIXa light chain and the catalytic domain. The FIXa structure includes a few putative interactions between EGF2 and the proteas...

journal_title：Biochemistry

authors： Fribourg C,Meijer AB,Mertens K

更新日期：2006-09-05 00:00:00

abstract：:Thiolases are CoA-dependent enzymes which catalyze the formation of a carbon-carbon bond in a Claisen condensation step and its reverse reaction via a thiolytic degradation mechanism. Mitochondrial acetoacetyl-coenzyme A (CoA) thiolase (T2) is important in the pathways for the synthesis and degradation of ketone bodie...

journal_title：Biochemistry

authors： Haapalainen AM,Meriläinen G,Pirilä PL,Kondo N,Fukao T,Wierenga RK

更新日期：2007-04-10 00:00:00

abstract：:We have examined the phase partition preferences of the even chain length (n = 10-22) diacyl-3'3'-indocarbo-cyanine iodides (Cn diI) incorporated in disaturated lecithin (PC) vesicles. Two parameters were used to determine this phase preference: (i) the direction of shift of the phase transition temperature (Tm) induc...

journal_title：Biochemistry

authors： Klausner RD,Wolf DE

更新日期：1980-12-23 00:00:00

abstract：:Studies of ligand binding to acetylcholinesterase (AChE) have demonstrated two sites of interaction. An acyl-enzyme intermediate is formed at the acylation site, and catalytic activity can be inhibited by ligand binding to a peripheral site. The three-dimensional structures of AChE-ligand complexes reveal a narrow and...

journal_title：Biochemistry

authors： Mallender WD,Szegletes T,Rosenberry TL

更新日期：2000-07-04 00:00:00

abstract：:Using the baculovirus/Sf9 cell expression system, we have incorporated 99% 15N-enriched [alpha,epsilon-15N2]-L-lysine into the rod visual pigment rhodopsin. We have subsequently investigated the protonated Schiff base (pSB) linkage in the [alpha, epsilon-15N2]Lys-rhodopsin with cross-polarization magic angle spinning ...

journal_title：Biochemistry

authors： Creemers AF,Klaassen CH,Bovee-Geurts PH,Kelle R,Kragl U,Raap J,de Grip WJ,Lugtenburg J,de Groot HJ

更新日期：1999-06-01 00:00:00

abstract：:The relative quantitative importance of the factors that determine the fidelity of translation is largely unknown, which makes predicting the extent to which the degeneracy of the genetic code can be broken challenging. Our strategy of using orthogonal tRNA/aminoacyl tRNA synthetase pairs to precisely direct the incor...

journal_title：Biochemistry

authors： Schmitt MA,Biddle W,Fisk JD

更新日期：2018-05-15 00:00:00

abstract：:Drug substrates stimulate ATPase activity of the P-glycoprotein (P-gp) ATP-binding cassette drug pump by an unknown mechanism. Cross-linking analysis was performed to test if drug substrates stimulate P-gp ATPase activity by altering cross-talk at the first transmission interface linking the drug-binding [intracellula...

journal_title：Biochemistry

authors： Loo TW,Clarke DM

更新日期：2016-05-24 00:00:00

abstract：:We report differences in the interaction of two structurally similar phenanthroline intercalators, ethidium and propidium, with poly(dA).poly(dT) and poly[d(A-T)] as a function of ionic strength based on titration microcalorimetry, fluorescence titration, and hydrostatic pressure measurements. Both ethidium and propid...

journal_title：Biochemistry

authors： Marky LA,Macgregor RB Jr

更新日期：1990-05-22 00:00:00

abstract：:The insulin-linked polymorphic region (ILPR) is a regulatory sequence in the promoter region upstream of the human insulin gene and is widely recognized as a locus of type 1 diabetes susceptibility. Polymorphism of the ILPR sequence can affect expression of both insulin and the adjacent insulin-like growth factor 2 (I...

journal_title：Biochemistry

authors： Wang Y,Zhang H,Ligon LA,McGown LB

更新日期：2009-09-01 00:00:00

abstract：:Phosphatidylserine (PS) in the plasma membrane of nonactivated human platelets is almost entirely located on the cytoplasmic side. Stimulation of platelets with the Ca2+ ionophore A23187 or combined action of collagen plus thrombin results in a rapid loss of the asymmetric distribution of PS. Also, treatment with the ...

journal_title：Biochemistry

authors： Bevers EM,Tilly RH,Senden JM,Comfurius P,Zwaal RF

更新日期：1989-03-21 00:00:00

abstract：:The production of proteins via recombinant DNA technology often requires the in vitro folding of inclusion bodies, which are protein aggregates. To create a more efficient redox buffer for the in vitro folding of disulfide containing proteins, aromatic thiols were investigated for their ability to increase the folding...

journal_title：Biochemistry

authors： Gough JD,Gargano JM,Donofrio AE,Lees WJ

更新日期：2003-10-14 00:00:00

abstract：:Designing subtype-selective agonists for neuronal nicotinic acetylcholine receptors is a challenging and significant goal aided by intricate knowledge of each subtype's binding patterns. We previously reported that in α6β2 receptors, acetylcholine makes a functional cation-π interaction with Trp149, but nicotine and T...

journal_title：Biochemistry

authors： Post MR,Lester HA,Dougherty DA

更新日期：2017-04-04 00:00:00

abstract：:The paramagnetic enhancements in the NMR relaxation rates for the fluorine in fluorophthalates have been used to determine the position of the phthalate with respect to the mononuclear metal ion in native and metal-substituted derivatives of phthalate dioxygenase (PDO). These studies show directly that the substrate i...

journal_title：Biochemistry

authors： Tierney DL,Gassner GT,Luchinat C,Bertini I,Ballou DP,Penner-Hahn JE

更新日期：1999-08-24 00:00:00

abstract：:The role of the amino-terminal region of alpha-striated muscle tropomyosin has been analyzed by reconstituting thin filaments with a version of the protein lacking the first six amino acids. While Omp T-digested tropomyosin (residues 7-284) does not bind significantly to F-actin at micromolar concentrations, an intera...

journal_title：Biochemistry

authors： Goonasekara CL,Heeley DH

更新日期：2009-04-21 00:00:00

abstract：:The dynamics of the single-stranded, helix--coil transition of poly(adenylic acid) have been investigated by using the Raman laser temperature jump technique. The driving forces of this conformational transition have been probed by varying the cosolvent in mixed aqueous solutions. The rate of helix formation correlate...

journal_title：Biochemistry

authors： Dewey TG,Turner DH

更新日期：1980-04-15 00:00:00

abstract：:The reactions of fully reduced and mixed-valence bovine heart cytochrome c oxidase with dioxygen have been reinvestigated in the absence and presence of metal ions (Zn(2+), Ni(2+), and Cd(2+)) by time-resolved optical absorption spectroscopy using the CO flow-flash technique. The time-resolved data were recorded on a ...

journal_title：Biochemistry

authors： Szundi I,Cappuccio J,Einarsdóttir O

更新日期：2004-12-21 00:00:00

abstract：:Molecular dynamics simulations have been used to successfully reproduce the observed pH-dependent conformational properties of the amyloid beta(1-28) peptide [Kirshenbaum and Daggett (1995) Biochemistry, 34, 7629-7639]. On the basis of these simulations a mechanism was proposed for the unfolding of the N-terminal port...

journal_title：Biochemistry

authors： Kirshenbaum K,Daggett V

更新日期：1995-06-13 00:00:00

abstract：:Binding of the nonhydrolyzable ATP analogue 5'-adenylyl-beta, gamma-imidodiphosphate (ADPNP) to Escherichia coli DNA gyrase can lead to a limited noncatalytic supercoiling of DNA. Here we examine the efficiency of coupling between ADPNP binding and the change in linking number either of positively or negatively superc...

journal_title：Biochemistry

authors： Bates AD,O'Dea MH,Gellert M

更新日期：1996-02-06 00:00:00

abstract：:We have examined the binding of 125I-labeled human and mouse epidermal growth factors (EGF) to human alpha 2-macroglobulin (alpha 2M). In the presence of human neutrophil elastase, both mouse and human EGF bound to alpha 2M, whereas little binding was found to native alpha 2M. Binding was found to be predominantly cov...

journal_title：Biochemistry

authors： Gettins PG,Crews BC

更新日期：1993-08-10 00:00:00

abstract：:Triple-helical DNA shows increasing potential for applications in the control of gene expression (including therapeutics) and the development of sequence-specific DNA-cleaving agents. The major limitation in this technology has been the requirement of homopurine sequences for triplex formation. We describe a simple ap...

journal_title：Biochemistry

authors： Jayasena SD,Johnston BH

更新日期：1992-01-21 00:00:00

abstract：:The bacterial chemoreceptor complex governs signal detection and the upstream elements of chemotactic behavior, but the detailed molecular mechanism is still unclear. We have assembled nativelike functional arrays of an aspartate receptor cytoplasmic fragment (CF) with its two cytoplasmic protein partners (CheA and Ch...

journal_title：Biochemistry

authors： Harris MJ,Struppe JO,Wylie BJ,McDermott AE,Thompson LK

更新日期：2016-07-05 00:00:00

abstract：:Prion diseases are associated with a conformational switch in the prion protein (PrP) from its normal cellular form (denoted PrP(C)) to a disease-associated "scrapie" form (PrP(Sc)). A number of PrP(Sc)-like conformations can be generated by incubating recombinant PrP(C) at low pH, indicating that protonation of key r...

journal_title：Biochemistry

authors： Hosszu LL,Tattum MH,Jones S,Trevitt CR,Wells MA,Waltho JP,Collinge J,Jackson GS,Clarke AR

更新日期：2010-10-12 00:00:00

abstract：:Hemocyanin (Hc) is a dinuclear copper protein that binds oxygen reversibly. The structure of the Cu(II) site in a derivative of hemocyanin known as green half-met (GHM) has been analyzed using the pulsed EPR technique of electron spin-echo envelope modulation (ESEEM) spectroscopy. The derivative, prepared by treating ...

journal_title：Biochemistry

authors： Magliozzo RS,Bubacco L,McCracken J,Jiang F,Beltramini M,Salvato B,Peisach J

更新日期：1995-02-07 00:00:00