Abstract:
:Cibacron Blue F3GA, the polycyclic blue chromophore of Blue Dextran 2000, inhibits the catalytic subunit of bovine brain protein kinase. The rate of inactivation exhibits a hyperbolic dependence on the dye concentration. This suggests that an enzyme-dye complex forms prior to inactivation. Protein and peptide substrates or MgATP protects the enzyme against dye inactivation. Kinetic measurements show that the dissociation constant is approximately 100 micro M and the maximal rate of inactivation is 0.13 min-1 at 22 degree C. Inactivation is temperature and time dependent. Exhaustive dialysis, gel filtration, or the addition of substrate fails to reactivate inhibited enzyme. The failure to reverse the inhibition suggests that the dye forms a covalent complex with the enzyme. Denaturation by sodium dodecyl sulfate also fails to dissociate the dye from enzyme. The hyperbolic kinetics, moreover, suggest that the dye functions as an active site directed reagent. The holoenzyme is resistant to Cibacron Blue inactivation. Addition of cAMP converts the enzyme to a form susceptible to inhibition. In agreement with our previous studies, these results also suggest that the regulatory subunit shields, either physically or functionally, the active site of the catalytic subunit.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Witt JJ,Roskoski R Jrdoi
10.1021/bi00542a022subject
Has Abstractpub_date
1980-01-08 00:00:00pages
143-8issue
1eissn
0006-2960issn
1520-4995journal_volume
19pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Phospholipids containing a saturated fatty acid in the primary position and an unsaturated fatty acid in the secondary position are a major structural part of biological membranes. The mixed-chain hydrophobic core of the membranes is the diacylglycerol part. To better understand the core properties of membranes we hav...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00051a015
更新日期:1995-12-26 00:00:00
abstract::Type II polyketides are a class of natural products that include pharmaceutically important aromatic compounds such as the antibiotic tetracycline and antitumor compound doxorubicin. The type II polyketide synthase (PKS) is a complex consisting of 5-10 standalone domains homologous to fatty acid synthase (FAS). Polyke...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7016427
更新日期:2008-02-19 00:00:00
abstract::The carboxypeptidase inhibitor from Russet Burbank potatoes (C. A. Ryan et al. (1974b), J. Biol. Chem 249, 5495) is a mixture of approximately equal amounts of two polypeptide chains containing 38 and 39 amino acid residues, respectively. The chains differ in their amino terminal sequence only, one beginning with smal...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00677a036
更新日期:1975-03-25 00:00:00
abstract::Hirudin is the most potent and specific thrombin inhibitor from medicinal leech with a Ki value of 2.2 x 10(-14) M. It consists of an active site inhibitor segment, hirudin1-48, a fibrinogen-recognition exosite inhibitor segment, hirudin55-65, and a linker, hirudin49-54, connecting these inhibitor segments. The role o...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00027a021
更新日期:1995-07-11 00:00:00
abstract::The mechanism of the oxidative decarboxylation reaction catalyzed by the NAD-malic enzyme from Ascaris suum has been examined with several different divalent metal ion activators and dinucleotide substrates. Primary deuterium and tritium isotope effects have been obtained and, in combination with the partitioning rati...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00010a015
更新日期:1995-03-14 00:00:00
abstract::Human protein Z is a vitamin K-dependent plasma glycoprotein, deficiency of which leads to a mild bleeding tendency. Protein Z appears to assist hemostasis by binding thrombin and promoting its association with phospholipid vesicles. In this study, to characterize the gene for protein Z, its organization and structure...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi972002a
更新日期:1998-05-12 00:00:00
abstract::Two forms of cytochrome P-450, designated P-450NMa and P-450NMb, were purified to electrophoretic homogeneity from rabbit nasal microsomes. The purified cytochromes, which contained 14-16 nmol of P-450/mg of protein, exhibited apparent monomeric molecular weights of 49,500 and 51,000, respectively. As indicated by sev...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00422a007
更新日期:1988-11-01 00:00:00
abstract::The beta chain 15-42 sequence of the fibrin(ogen) E region was implicated in heparin binding [Odrljin et al. (1996) Blood 88, 2050-2061]; whether heparin binds to other fibrin(ogen) regions remains to be clarified. To address this question, we studied the interaction of heparin with fibrinogen, fibrin, and their major...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0344073
更新日期:2003-07-01 00:00:00
abstract::Modulation of endogenous gene function, through sequence-specific recognition of double helical DNA via oligonucleotide-directed triplex formation, is a promising approach. Compared to the formation of pyrimidine motif triplexes, which require relatively low pH, purine motif appears to be the most gifted for their sta...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi1012589
更新日期:2011-05-17 00:00:00
abstract::Sulfhydryl-reactive derivatives of glucosamine were synthesized as potentially transportable affinity labels of the human erythrocyte hexose carrier. N-Maleoylglycyl derivatives of either 6- or 2-amino-2-deoxy-D-glucopyranose were the most potent inhibitors of 3-O-methylglucose uptake, with concentrations of half-maxi...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00430a044
更新日期:1989-02-21 00:00:00
abstract::The S-protein/vitronectin gene was isolated from a human genomic DNA library, and its sequence of about 5.3 kilobases including the adjacent 5' and 3' flanking regions was established. Alignment of the genomic DNA nucleotide sequence and the cDNA sequence indicated that the gene consisted of eight exons and seven intr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00395a024
更新日期:1987-10-20 00:00:00
abstract::The backbone dynamics of uniformly 15N-labeled interleukin-1 beta are investigated by using two-dimensional inverse detected heteronuclear 15N-1H NMR spectroscopy. 15N T1, T2, and NOE data at a spectrometer frequency of 600 MHz are obtained for 90% of the backbone amide groups. The data provide evidence for motions on...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00484a006
更新日期:1990-08-14 00:00:00
abstract::Band 3, the anion transport protein of human erythrocyte membranes, can be transferred from cells to liposomes and from liposomes back to cell membranes, retaining function and native orientation. After incubation with cells, sonicated phosphatidylcholine vesicles bind a transmembrane protein that comigrates with band...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00295a011
更新日期:1983-12-20 00:00:00
abstract::The transmission of regulatory signals between the alpha- and beta-subunits of the tryptophan synthase alpha 2 beta 2 complex from Salmonella typhimurium has been investigated by monitoring the luminescence properties of the enzyme in the presence and in the absence of the alpha-subunit ligand DL-alpha-glycerol 3-phos...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00148a014
更新日期:1992-08-25 00:00:00
abstract::(E)-4-Hydroxy-3-methylbut-2-enyl diphosphate reductase (IspH or LytB) catalyzes the terminal step of the MEP/DOXP pathway where it converts (E)-4-hydroxy-3-methylbut-2-enyl diphosphate (HMBPP) into the two products, isopentenyl diphosphate and dimethylallyl diphosphate. The reaction involves the reductive elimination ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi3001215
更新日期:2012-06-19 00:00:00
abstract::Here we demonstrate that monovalent cations can localize around B-DNA in geometrically regular, sequence-specific sites in oligonucleotide crystals. Positions of monovalent ions were determined from high-resolution X-ray diffraction of DNA crystals grown in the presence of thallium(I) cations (Tl(+)). Tl(+) has previo...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010391+
更新日期:2001-08-28 00:00:00
abstract::The trifunctional dinuclear platinum compounds 1,2/c,c [[cis-PtCl(NH(3))(2)]mu-H(2)N(CH(2))(6)NH(2)[cis-PtCl(2)(NH(3))]](+) and 1,2/t,c [[trans-PtCl(NH(3))(2)]mu-H(2)N(CH(2))(6)NH(2)[cis-PtCl(2)(NH(3))]](+) contain a monofunctional platinum coordination sphere linked to a cis-[PtCl(2)(amine)(2)] moiety. The compounds ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi030243e
更新日期:2004-06-22 00:00:00
abstract::Multivalent binding is an efficient means to enhance the affinity and specificity of chemical probes targeting multidomain proteins in order to study their function and role in disease. While the theory of multivalent binding is straightforward, physical and structural characterization of bivalent binding encounters m...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b00150
更新日期:2018-04-10 00:00:00
abstract::(+)-Delta-cadinene synthase (DCS) from Gossypium arboreum (tree cotton) is a sesquiterpene cyclase that catalyzes the cyclization of farnesyl diphosphate in the first committed step of the biosynthesis of gossypol, a phytoalexin that defends the plant from bacterial and fungal pathogens. Here, we report the X-ray crys...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi900483b
更新日期:2009-07-07 00:00:00
abstract::Listeriolysin O (LLO) is the most important virulence factor of the intracellular pathogen Listeria monocytogenes. Its main task is to enable escape of bacteria from the phagosomal vacuole into the cytoplasm. LLO belongs to the cholesterol-dependent cytolysin (CDC) family but differs from other members, as it exhibits...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi602497g
更新日期:2007-04-10 00:00:00
abstract::The globular domain of chicken histone H1 (GH1) has been studied by 1H homonuclear and 1H-15N heteronuclear 2D NMR spectroscopy. After the full assignment of the proton and 15N resonances, the tertiary structure of GH1 was determined by an iterative procedure using distance geometry and restrained simulated annealing....
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00203a004
更新日期:1994-09-20 00:00:00
abstract::Analogues of tri- and tetrapeptide substrates of carboxypeptidase A in which the scissile peptide linkage is replaced with a phosphonate moiety (-PO2--O-) were synthesized and evaluated as inhibitors of the enzyme. The inhibitors terminated with either L-lactate or L-phenyllactate [designated (O) Ala and (O) Phe, resp...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00441a022
更新日期:1989-07-25 00:00:00
abstract::Many current models of the Q cycle for the cytochrome (cyt) b6f and the cyt bc1 complexes incorporate 'Rieske' iron-sulfur protein (ISP) domain movements to gate electron transfer and to ensure high yields of proton shuttling. It was previously proposed that copper ions, which bind at a site distant from the quinol ox...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi015996k
更新日期:2002-03-26 00:00:00
abstract::The redox properties of the [2Fe-2S] cluster in the 24 kDa subunit of bovine heart mitochondrial NADH:ubiquinone oxidoreductase (complex I) and three of its homologues have been defined using protein-film voltammetry. The clusters in all four examples display characteristic, pH-dependent redox transitions, which, unus...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi026026f
更新日期:2002-08-06 00:00:00
abstract::Resonance Raman spectra of squid rhodopsin have been obtained under a variety of temperature and illumination conditions. The data have been characterized in terms of spectral contributions from squid rhodopsin, isorhodopsin, bathorhodopsin, lumirhodopsin, mesorhodopsin, P-465, and acid metarhodopsin. The results are ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00615a018
更新日期:1978-10-31 00:00:00
abstract::Oligodeoxyribonucleotides 8-12 nucleotides in length whose sequences are complementary to the 5' end, the initiation codon regions, or the coding regions of rabbit globin mRNA were tested for their ability to inhibit translation in a rabbit reticulocyte lysate and in a wheat germ extract. The oligomers interact specif...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00343a015
更新日期:1985-10-22 00:00:00
abstract::Endogenous DNA damage occurs at a rate of at least 20,000 lesions per cell per day. Base excision repair (BER) is a key pathway for maintaining genome stability. Several pol beta variants were identified as conferring resistance to 3'-azido-3'-deoxythymidine (AZT) in Escherichia coli (Kosa et al. (1999) J. Biol. Chem....
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi702104y
更新日期:2008-08-05 00:00:00
abstract::To determine whether ligand-receptor interactions could engender the selective uptake by deficient cells of enzyme-laden liposomes, aggregated human IgG was used to coat liposomes which had previously trapped purified hexosaminidase A (Hex A). By a new, high-yield procedure, Hex A was purified 7000-fold from human pla...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00647a034
更新日期:1976-01-27 00:00:00
abstract::Protein enzymes often use ionizable side chains, such as histidine, for general acid-base catalysis because the imidazole pK(a) is near neutral pH. RNA enzymes, on the other hand, are comprised of nucleotides which do not have apparent pK(a) values near neutral pH. Nevertheless, it has been recently shown that cytidin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi001976r
更新日期:2000-12-26 00:00:00
abstract::Structural changes during the photochemical reactions of unhydrated air-dried films of bovine rhodopsin in rod outer segments were examined by visible and Fourier transform infrared (FTIR) spectroscopy at 200, 240, and 280 K. These films exhibited conversion from a lumirhodopsin state to a metarhodopsin I state with a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00051a025
更新日期:1995-12-26 00:00:00