Specific binding of ATP to extracellular sites on Torpedo acetylcholine receptor.

abstract：:Each regulatory subunit of the cAMP-dependent protein kinase contains two in-tandem cAMP binding sites. Photolabeling of holoenzyme I with 8-azidoadenosine 3',5'-monophosphate (8-N3-cAMP) leads to the covalent modification of two residues, Trp-260 and Tyr-371. In order to correlate photolabeling of these two residues ...

journal_title：Biochemistry

authors： Bubis J,Taylor SS

更新日期：1987-06-16 00:00:00

abstract：:Biotin synthase catalyzes the conversion of dethiobiotin (DTB) to biotin through the oxidative addition of sulfur between two saturated carbon atoms, generating a thiophane ring fused to the existing ureido ring. Biotin synthase is a member of the radical SAM superfamily, composed of enzymes that reductively cleave S-...

journal_title：Biochemistry

authors： Taylor AM,Stoll S,Britt RD,Jarrett JT

更新日期：2011-09-20 00:00:00

abstract：:Nogo-66 receptor (NgR1) is a leucine-rich repeat (LRR) protein that forms part of a signaling complex modulating axon regeneration. Previous studies have shown that the entire LRR region of NgR1, including the C-terminal cap of the LRR, LRRCT, is needed for ligand binding, and that the adjacent C-terminal region (CT s...

journal_title：Biochemistry

authors： Wen D,Wildes CP,Silvian L,Walus L,Mi S,Lee DH,Meier W,Pepinsky RB

更新日期：2005-12-20 00:00:00

abstract：:The structure of a synthetic peptide corresponding to residues 1-45 of rabbit muscle adenylate kinase has been studied in aqueous solution by two-dimensional NMR, FTIR, and CD spectroscopy. This peptide, which binds MgATP and is believed to represent most of the MgATP-binding site of the enzyme [Fry, D.C., Kuby, S.A.,...

journal_title：Biochemistry

authors： Fry DC,Byler DM,Susi H,Brown EM,Kuby SA,Mildvan AS

更新日期：1988-05-17 00:00:00

abstract：:Simple procedures for the anaerobic preparation of photoactive and stable P840 reaction centers from Chlorobium tepidum and Chlorobium limicola in good yield are presented and quantitated. The subunit composition was tested by cosedimentation in sucrose density gradients. For C. limicola, it minimally comprises four s...

journal_title：Biochemistry

authors： Hager-Braun C,Xie DL,Jarosch U,Herold E,Büttner M,Zimmermann R,Deutzmann R,Hauska G,Nelson N

更新日期：1995-07-25 00:00:00

abstract：:We introduced a stop codon in place of the ATT codon encoding Ile283 (numbered from the Met initiation codon) in the petA gene from Chlamydomonas reinhardtii. The resulting protein was expected to be truncated on its carboxy-terminus end, lacking the last 35 amino acids. This region of the polypeptide sequence encompa...

journal_title：Biochemistry

authors： Kuras R,Wollman FA,Joliot P

更新日期：1995-06-06 00:00:00

abstract：:Although the addition of various divalent metals to beta-galactosidase resulted in apparent activation, only Mg2+ and Mn2+ actually did activate. The apparent activation by the other divalent metals was shown to be due to Mg2+ impurities. Calcium did not activate, but experiments suggested that it did bind. Other diva...

journal_title：Biochemistry

authors： Huber RE,Parfett C,Woulfe-Flanagan H,Thompson DJ

更新日期：1979-09-18 00:00:00

abstract：:The temperature dependence of biological rates at different scales (from individual enzymes to isolated organisms to ecosystem processes such as soil respiration and photosynthesis) is the subject of much historical and contemporary research. The precise relationship between the temperature dependence of enzyme rates ...

journal_title：Biochemistry

authors： Prentice EJ,Hicks J,Ballerstedt H,Blank LM,Liáng LNL,Schipper LA,Arcus VL

更新日期：2020-09-29 00:00:00

abstract：:Little is known about the extent to which protein flexibility contributes to antigen-antibody recognition and cross-reactivity. Using short coil peptides (leucine zippers) as model antigens, we demonstrate that a monoclonal antibody can force a noncognate peptide into a conformation that is similar to the conformation...

journal_title：Biochemistry

authors： Leder L,Berger C,Bornhauser S,Wendt H,Ackermann F,Jelesarov I,Bosshard HR

更新日期：1995-12-19 00:00:00

abstract：:6-[(4-Bromo-2,3-dioxobutyl)thio]-6-deaminoadenosine 5'-diphosphate (6-BDB-TADP) has been shown to react at the reduced diphosphopyridine nucleotide (DPNH) inhibitory site of bovine liver glutamate dehydrogenase with incorporation of 1 mol of reagent/mol of enzyme subunit [Batra, S. P., & Colman, R. F. (1984) Biochemis...

journal_title：Biochemistry

authors： Batra SP,Colman RF

更新日期：1986-06-17 00:00:00

abstract：:Nicotinic acid phosphoribosyltransferase (NAPRTase; EC 2.4.2.11) forms nicotinic acid mononucleotide (NAMN) and PPi from 5-phosphoribosyl 1-pyrophosphate (PRPP) and nicotinic acid (NA). The Vmax NAMN synthesis activity of the Salmonella typhimurium enzyme is stimulated about 10-fold by ATP, which, when present, is hyd...

journal_title：Biochemistry

authors： Rajavel M,Lalo D,Gross JW,Grubmeyer C

更新日期：1998-03-24 00:00:00

abstract：:Hepatitis C virus (HCV) protease NS3 and its protein activator NS4A participate in the processing of the viral polyprotein into its constituent nonstructural proteins. The NS3/4A complex is thus an attractive target for antiviral therapy against HCV. We expressed the full-length NS3 and NS4A in insect cells as a solub...

journal_title：Biochemistry

authors： Sali DL,Ingram R,Wendel M,Gupta D,McNemar C,Tsarbopoulos A,Chen JW,Hong Z,Chase R,Risano C,Zhang R,Yao N,Kwong AD,Ramanathan L,Le HV,Weber PC

更新日期：1998-03-10 00:00:00

abstract：:One of the key pathological features of Alzheimer's disease is the aggregation of tau protein. We are therefore searching for compounds capable of inhibiting this reaction. On the basis of an initial screen of 200000 compounds [Pickhardt, M., Gazova, Z., von Bergen, M., Khlistunova, I., Wang, Y., Hascher, A., Mandelko...

journal_title：Biochemistry

authors： Pickhardt M,Larbig G,Khlistunova I,Coksezen A,Meyer B,Mandelkow EM,Schmidt B,Mandelkow E

更新日期：2007-09-04 00:00:00

abstract：:The oxygen enzymatically inserted as a hydroxyl function by chick kidney homogenate into the 24 position of 25-hydroxyvitamin D3 to give 24,25-dihydroxyvitamin D3 is derived exclusively from 18O2. Therefore, like the 25-hydroxyvitamin D3-lalpha-hydroxylase system, the 25-hydroxyvitamin D3-24-hydroxylase system is also...

journal_title：Biochemistry

authors： Madhok TC,Schnoes HK,DeLuca HF

更新日期：1977-05-17 00:00:00

abstract：:A synthetic gene coding for the inhibitor protein of bovine heart mitochondrial F1 adenosine triphosphatase was designed and cloned in Escherichia coli. Recombinant F1-ATPase inhibitor protein was overproduced in E. coli and secreted to the periplasmic space. Biologically active recombinant F1-ATPase inhibitor protein...

journal_title：Biochemistry

authors： Van Heeke G,Deforce L,Schnizer RA,Shaw R,Couton JM,Shaw G,Song PS,Schuster SM

更新日期：1993-09-28 00:00:00

abstract：:The spontaneous hydrolyses of lactic acid O-phenyl phosphate (I) and, to a lesser extent, 3-hydroxybutyric acid O-phenyl phosphate (II) have been investigated and compared with similar intramolecular and bimolecular reactions. Compared to bimolecular nucleophilic reactions, the reactivity of II is similar to other sys...

journal_title：Biochemistry

authors： Steffens JJ,Siewers IJ,Benkovic SJ

更新日期：1975-06-03 00:00:00

abstract：:The behavior of Ca2+-ATPase from sarcoplasmic reticulum in detergent solution was compared with that of Ca2+-ATPase which had been cleaved in half by limited trypsin digestion. Attempts to dissociate the fragments (I and II) with an excess of detergent micelles demonstrated that fragments I and II are structurally dep...

journal_title：Biochemistry

authors： Rizzolo LJ,Tanford C

更新日期：1978-09-19 00:00:00

abstract：:The side chains of R269 and N270 interact with the phosphodianion of dihydroxyacetone phosphate (DHAP) bound to glycerol 3-phosphate dehydrogenase (GPDH). The R269A, N270A, and R269A/N270A mutations of GPDH result in 9.1, 5.6, and 11.5 kcal/mol destabilization, respectively, of the transition state for GPDH-catalyzed ...

journal_title：Biochemistry

authors： Reyes AC,Amyes TL,Richard JP

更新日期：2016-03-15 00:00:00

abstract：:De novo purine biosynthesis proceeds by two divergent paths. In bacteria, yeasts, and plants, 5-aminoimidazole ribonucleotide (AIR) is converted to 4-carboxy-AIR (CAIR) by two enzymes: N(5)-carboxy-AIR (N(5)-CAIR) synthetase (PurK) and N(5)-CAIR mutase (class I PurE). In animals, the conversion of AIR to CAIR requires...

journal_title：Biochemistry

authors： Tranchimand S,Starks CM,Mathews II,Hockings SC,Kappock TJ

更新日期：2011-05-31 00:00:00

abstract：:Phospholipid transfer protein (PLTP) is expressed by macrophage-derived foam cells in human atherosclerotic lesions, suggesting a regulatory role for PLTP in cellular cholesterol homeostasis. However, the exact role of PLTP in the reverse cholesterol transport pathway is not known. PLTP is present in plasma as two for...

journal_title：Biochemistry

authors： Vikstedt R,Metso J,Hakala J,Olkkonen VM,Ehnholm C,Jauhiainen M

更新日期：2007-10-23 00:00:00

abstract：:Three crystal structures have been determined of active site specific substituted Cd(II) horse liver alcohol dehydrogenase and its complexes. Intensities were collected for the free, orthorhombic enzyme to 2.4-A resolution and for a triclinic binary complex with NADH to 2.7-A resolution. A ternary complex was crystall...

journal_title：Biochemistry

authors： Schneider G,Cedergren-Zeppezauer E,Knight S,Eklund H,Zeppezauer M

更新日期：1985-12-03 00:00:00

abstract：:The heme propionate groups of both myoglobin (Mb) and cytochrome b5 form hydrogen bonds with nearby surface amino acids residues that are believed to stabilize the heme-protein complex. To evaluate the magnitude of this stabilization, the kinetics of heme dissociation from variants of horse heart Mb and cytochrome b5 ...

journal_title：Biochemistry

authors： Hunter CL,Lloyd E,Eltis LD,Rafferty SP,Lee H,Smith M,Mauk AG

更新日期：1997-02-04 00:00:00

abstract：:Synthetic photocontrolled proteins could be powerful tools for probing cellular chemistry. Several previous attempts to produce such systems by incorporating photoisomerizable chromophores into biomolecules have led to photocontrol but with incomplete reversibility, where the chromophore becomes trapped in one photois...

journal_title：Biochemistry

authors： Woolley GA,Jaikaran AS,Berezovski M,Calarco JP,Krylov SN,Smart OS,Kumita JR

更新日期：2006-05-16 00:00:00

abstract：:The objective of this work is to determine the molecular mechanism and regulation of short-chain acyl-CoA dehydrogenase (SCAD) from Megasphaera elsdenii. To achieve this, the gene coding for SCAD from M. elsdenii was cloned and sequenced. Site-directed mutagenesis was then used to identify an amino acid residue that i...

journal_title：Biochemistry

authors： Becker DF,Fuchs JA,Banfield DK,Funk WD,MacGillivray RT,Stankovich MT

更新日期：1993-10-12 00:00:00

abstract：:Adenosine 5'-phosphosulfate (APS) kinase catalyzes the second reaction in the two-step conversion of inorganic sulfate to 3'-phosphoadenosine 5'-phosphosulfate (PAPS). This report presents the 2.0 A resolution crystal structure of ligand-free APS kinase from the filamentous fungus, Penicillium chrysogenum. The enzyme ...

journal_title：Biochemistry

authors： MacRae IJ,Segel IH,Fisher AJ

更新日期：2000-02-22 00:00:00

abstract：:It is generally accepted that electron transfer in bacterial photosynthesis is driven by the first singlet excited state of a special pair of bacteriochlorophylls (P*). We have examined the first steps of electron transfer in a mutant of the Rhodobacter sphaeroides reaction center in which charge separation from P* is...

journal_title：Biochemistry

authors： Van Brederode ME,Jones MR,Van Mourik F,Van Stokkum IH,Van Grondelle R

更新日期：1997-06-10 00:00:00

abstract：:The cytoplasmic disassembly of Ran.GTP.importin and Ran.GTP.exportin. cargo complexes is an essential step in the corresponding nuclear import and export cycles. It has previously been shown that such disassembly can be mediated by RanBP1 in the presence of RanGAP. The nuclear pore complex protein RanBP2 (Nup358) cont...

journal_title：Biochemistry

authors： Villa Braslavsky CI,Nowak C,Görlich D,Wittinghofer A,Kuhlmann J

更新日期：2000-09-26 00:00:00

abstract：:Heparin was carboxyl-reduced with sodium boro[3H]hydride and converted to a mixture of oligosaccharides by treatment with nitrous acid at pH 2. The oligosaccharide mixture was aldehyde-reduced with sodium boro[3H]hydride and the mixture of products, labeled both in the hexoses formed in the carboxyl-reduction step and...

journal_title：Biochemistry

authors： Shively JE,Conrad HE

更新日期：1976-09-07 00:00:00

abstract：:Studies on the structure-function relationship of transporters require the availability of sufficient amounts of the protein in a functional state. In this paper, we report the functional expression, purification, and reconstitution of the human sodium/d-glucose cotransporter1 (hSGLT1) in Pichia pastoris and ligand-in...

journal_title：Biochemistry

authors： Tyagi NK,Goyal P,Kumar A,Pandey D,Siess W,Kinne RK

更新日期：2005-11-29 00:00:00

abstract：:We find that specific oxidation for the Met-192 residue in delta-chymotrypsin to methionine sulfoxide results in a twofold increase in Km(app) and unchanged kcat in the hydrolysis of N-acetyl mono(amino acid) amide substrates. However, the catalyzed hydrolyses of N-acetyl dipeptide amide substrates by (methionine sulf...

journal_title：Biochemistry

authors： Treadway WJ Jr,Schultz RM

更新日期：1976-09-21 00:00:00