Abstract:
:The flavocytochrome p-cresol methylhydroxylase from Pseudomonas putida has been reported to have a Mr of 114,000 and to consist of two subunits, a flavoprotein and a cytochrome c, each with a Mr of 58,000. Recent X-ray crystallographic data from our laboratories [Shamala, N., Lim, L. W., Mathews, F. S., McIntire, W., Singer, T. P., & Hopper, D. J. (1986) Proc. Natl. Acad. Sci. U.S.A. 83, 4626-4630], however, indicate an alpha 2 beta 2 structure and a much lower molecular mass (approximately 8000) for the cytochrome subunit. In this paper we report data confirming the conclusions of X-ray crystallographic analysis. From quantitative amino acid analysis, the molecular mass of the flavoprotein monomer is shown to be 48,600 +/- 2200 and that of the cytochrome 8780 +/- 250. These values have been confirmed by gel electrophoresis under denaturing conditions. Gel chromatography under nondenaturing conditions shows that the isolated flavoprotein exists as a dimer, whereas the isolated cytochrome is a monomer. The complete amino acid sequence of the cytochrome c subunit is presented and is shown to have regions of homology to other bacterial c-type cytochromes. The partial N-terminal amino acid sequence (56 amino acids) of the flavoprotein subunit is also reported. The implications of the now established tetrameric structure of the flavocytochrome on data in the literature regarding the redox and association properties of the subunits are examined.
journal_name
Biochemistryjournal_title
Biochemistryauthors
McIntire W,Singer TP,Smith AJ,Mathews FSdoi
10.1021/bi00368a021subject
Has Abstractpub_date
1986-10-07 00:00:00pages
5975-81issue
20eissn
0006-2960issn
1520-4995journal_volume
25pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全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 association of nucleolar phosphoprotein C23 with preribosomal ribonucleoprotein (RNP) particles was examined in Novikoff hepatoma nucleoli. RNA was labeled with [3H]uridine for various times in cell suspensions, and RNP particles were extracted from isolated nucleoli and fractionated by sucrose gradient ultracentr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00368a063
更新日期:1986-10-07 00:00:00
abstract::HlyC is an internal protein acyltransferase that activates hemolysin, a toxic protein produced by pathogenic Escherichia coli. Acyl-acyl carrier protein (ACP) is the essential acyl donor. Separately subcloned, expressed, and purified prohemolysin A (proHlyA), HlyC, and [1-14C]myristoyl-ACP have been used to study the ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi982491u
更新日期:1999-03-16 00:00:00
abstract::Minibrain kinase/dual-specificity tyrosine phosphorylation regulated kinase 1A (MNB/DYRK1A) is a proline/arginine-directed serine/threonine kinase implicated in the learning deficits of Down syndrome. Epigallocatechin-3-gallate (EGCG), the major tea polyphenolic compound, is a potent MNB/DYRK1A inhibitor. In this stud...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi060632j
更新日期:2006-10-03 00:00:00
abstract::Two distinct regions of angiogenin are critical for angiogenic activity: a catalytic site capable of cleaving RNA and a noncatalytic site, encompassing residues 60-68, which may bind to an endothelial cell-surface receptor [Hallahan, T. W., Shapiro, R., & Vallee, B. L. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 2222-222...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00149a036
更新日期:1992-09-01 00:00:00
abstract::Betaine-homocysteine S-methyltransferase (BHMT) is a zinc-dependent enzyme that catalyzes the transfer of a methyl group from glycine betaine (Bet) to homocysteine (Hcy) to form dimethylglycine (DMG) and methionine (Met). Previous studies in other laboratories have indicated that catalysis proceeds through the formati...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi049821x
更新日期:2004-05-11 00:00:00
abstract::Transmembrane (TM) alpha-helical peptides with neutral flanking residues such as tryptophan form highly ordered striated domains when incorporated in gel-state 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) bilayers and inspected by atomic force microscopy (AFM) (1). In this study, we analyze the molecular organiz...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi048047a
更新日期:2005-01-11 00:00:00
abstract::Post-translational phosphorylation and the related conformational changes in signaling proteins are responsible for regulating a wide range of subcellular processes. Human Pin1 is central to many of these cell signaling pathways in normal and aberrant subcellular processes, catalyzing cis-trans isomerization of the pe...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi2009954
更新日期:2011-11-08 00:00:00
abstract::The zinc metalloenzyme protein farnesyltransferase (FTase) catalyzes the alkylation of a cysteine residue of protein substrates with a 15 carbon farnesyl group. We have developed fluorescence assays to directly measure the affinity of the enzyme for peptide and protein (Ras) substrates. A peptide corresponding to the ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi981525v
更新日期:1998-11-03 00:00:00
abstract::The packing of lipids into different aggregates, such as spheres, rods, or bilayers, is dependent on the hydrophobic volume, the hydrocarbon-water interfacial area, and the hydrocarbon chain length of the participating molecules, according to the self-assembly theory [Israelachvili, J. N., Marcelja, S., & Horn, R. G. ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00371a038
更新日期:1986-11-18 00:00:00
abstract::Antisera were raised in rabbits against the 40-kDa alpha subunit of bovine lung GTP-binding protein, which were identified as the alpha subunit of Gi2 (Gi2 alpha) by the analysis of the partial amino acid sequence. Antibodies were purified with a Gi2 alpha-coupled Sepharose column and then were passed through a Gi1 al...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00437a035
更新日期:1989-05-30 00:00:00
abstract::Phe-tRNAPhe species modified on the 3'-terminal ribose residue were investigated for their ability to participate in individual steps of the elongation cycle using eukaryotic ribosomes from reticulocytes. None of the Phe-tRNAs used, namely Phe-tRNAPhe-C-C-3'dA, Phe-tRNAPhe-C-C-3'-NH2A, and Phe-tRNAPhe-C-C-Aoxi-red, ca...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00661a035
更新日期:1976-08-10 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
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b01033
更新日期:2019-01-15 00:00:00
abstract::Rod outer segment membrane guanylate cyclase (ROS-GC) transduction system is a central component of the Ca(2+)-sensitive phototransduction machinery. The system is composed of two parts: Ca(2+) sensor guanylate cyclase activating protein (GCAP) and ROS-GC. GCAP senses Ca(2+) impulses and inhibits the cyclase. This ope...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi034025x
更新日期:2003-05-20 00:00:00
abstract::The gene for the human substance P receptor (NK-1) was cloned using cDNA probes made by the polymerase chain reaction from primers based on the rat sequence. The gene spans 45-60 kb and is contained in five exons, with introns interrupting at sites homologous to those in the NK-2 receptor gene. Analysis of restriction...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00108a006
更新日期:1991-11-05 00:00:00
abstract::Differential expression of subunit genes from the nicotinic acetylcholine receptor (AChR) superfamily yields distinct receptor subtypes. As each AChR subtype has a specific subunit composition and many subunit combinations appear not to be expressed, each subunit must contain some information leading to proper assembl...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00254a031
更新日期:1994-12-20 00:00:00
abstract::Poly(ethylene glycol) (PEG)-mediated fusion of phosphatidylcholine model membranes has been shown to mimic the protein-mediated biomembrane process [Lee, J., and Lentz, B. R. (1998) Proc. Natl. Acad. Sci. U.S.A. 95, 9274-9279]. Unlike the simple model membranes used in this earlier study, the lipid composition of fuso...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi002030k
更新日期:2001-04-10 00:00:00
abstract::Budding of retroviruses requires the structural precursor polyprotein, Gag, to target the plasma membrane through its N-terminal matrix (MA) domain. For HIV-1, the interaction between membrane signaling molecule phosphatidylinositol 4,5-diphosphate (PIP2) and MA induces the exposure of myristate and promotes membrane ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi701984h
更新日期:2008-02-19 00:00:00
abstract::Trifluoperazine (TFP) was shown to interact with the cyanogen bromide fragment 9 (CB9) (residues 84-135) of rabbit skeletal troponin C and with a synthetic peptide representing the N-terminal region of CB9. The phenothiazine did not affect the calcium binding property of CB9 as observed by proton magnetic resonance an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00276a010
更新日期:1983-03-29 00:00:00
abstract::In addition to its superoxide dismutase (SOD) activity, Cu,Zn-superoxide dismutase (CuZnSOD) catalyzes the reductive decomposition of S-nitroso-L-glutathione (GSNO) in the presence of thiols such as L-glutathione (GSH). The GSNO-reductase activity but not the superoxide dismutase (SOD) activity of CuZnSOD is inhibited...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi061077o
更新日期:2006-10-24 00:00:00
abstract::Phospholipase A2 from Naja naja naja venom (Indian cobra) undergoes a concentration-dependent aggregation, and at an assay concentration of 1 microgram mL-1, it exists as a monomer. However, there is some evidence that the enzyme is actually active as a dimer or higher order aggregate. Previous attempts to determine t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00343a018
更新日期:1985-10-22 00:00:00
abstract::Phosphatidic (PtdOH) acid formation is recognized as an important step in numerous signaling pathways in both plants and mammals. To study the role of this lipid in signaling pathways, it is of major interest to be able to increase the amount of this lipid directly. Therefore, "caged" PtdOH was synthesized, which rele...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0351460
更新日期:2004-04-13 00:00:00
abstract::Transcarboxylase is made up of a central hexameric subunit (S20,W similar 12 S), three peripheral dimeric metallo subunits (S20,W similar to 5 S), and six biotinyl carboxyl carrier subunits (S20,W similar to 1.3 S). The results presented here show that the carboxyl carrier subunit is required for assembly of the 12S a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00679a010
更新日期:1975-04-22 00:00:00
abstract::13C NMR has been used to demonstrate the metabolism of dilute solutions of labeled formaldehyde by Escherichia coli to methanol, formate, carbon dioxide, and several other unidentified metabolites which contain labeled CH2 groups. Aeration of bacterial suspensions within the spectrometer dramatically increased the rat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00298a017
更新日期:1984-01-31 00:00:00
abstract::The relationship between triacylglycerol and monoacylglycerol hydrolyzing activities of purified rat heart lipoprotein lipase was studied using emulsified trioleoylglycerol and micellar or albumin-bound monooleoylglycerol as substrates. The maximal reaction rates obtained with the two substrates were similar (650 and ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00654a017
更新日期:1976-05-04 00:00:00
abstract::Hemophores from Serratia marcescens (HasA(sm)) and Pseudomonas aeruginosa (HasA(p)) bind hemin between two loops, which harbor the axial ligands H32 and Y75. Hemin binding to the Y75 loop triggers closing of the H32 loop and enables binding of H32. Because Yersinia pestis HasA (HasA(yp)) presents a Gln at position 32,...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi400280z
更新日期:2013-04-23 00:00:00
abstract::The simplest carbapenem antibiotic, (5R)-carbapen-2-em-3-carboxylic acid, is biosynthesized from primary metabolites in Pectobacterium carotorova by the action of three enzymes, carboxymethylproline synthase (hereafter named CarB), carbapenam synthetase, and carbapenem synthase. CarB, a member of the crotonase superfa...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0483662
更新日期:2004-12-21 00:00:00
abstract::A general protocol for preparation of oligonucleotides containing intrastrand cross-links between the exocyclic amino groups of adjacent deoxyguanosines has been developed. A series of 2, 3, and 4 methylene cross-links was incorporated site-specifically into an 11-mer (5'-GGCAGGTGGTG-3', cross-linked positions are und...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010450j
更新日期:2002-03-05 00:00:00
abstract::We have obtained the 470 MHz 19F NMR spectra of wild type [4-F]Trp-labeled myoglobins (MbCO, MbO2, deoxyMb, metMb, and MbCN) and hemoglobins (HbCO, HbO2, and deoxyHb), as well as those of several mutants (W7F Mb, betaW15F Hb, betaW37S Hb, and betaY130F Hb, all as the carbonmonoxy adducts), prepared via site-directed m...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi961664h
更新日期:1997-03-25 00:00:00
abstract::The electron paramagnetic resonance (EPR) spectra of spin-labeled DNA duplexes, both bound to DEAE-Sephadex and free in solution, have been analyzed. The nitroxide spin-labels are covalently linked to a deoxyuridine residue using either a monoacetylene or diacetylene tether. This difference in tether length produces a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00013a028
更新日期:1995-04-04 00:00:00