Abstract:
:We report cloning, expression in Escherichia coli, and purification of cytochrome P450 from a deep-sea bacterium Photobacterium profundum strain SS9 (P450-SS9). The enzyme, which is predominately high spin (86%) in the absence of any added ligand, binds fatty acids and their derivatives and exhibits the highest affinity for myristic acid. Binding of the majority of saturated fatty acids displaces the spin equilibrium further toward the high-spin state, whereas the interactions with unsaturated fatty acids and their derivatives (arachidonoylglycine) have the opposite effect. Pressure perturbation studies showed that increasing pressure fails to displace the spin equilibrium completely to the low-spin state in the ligand-free P450-SS9 or in the complexes with either myristic acid or arachidonoylglycine. Stabilization of high-spin P450-SS9 signifies a pressure-induced transition to a state with reduced accessibility of the active site. This transition, which is apparently associated with substantial hydration of the protein, is characterized by the reaction volume change (ΔV) around -100 to -200 mL/mol and P(1/2) of 300-800 bar, which is close to the pressure of habitation of P. profundum. The transition to a state with confined water accessibility is hypothesized to represent a common feature of cytochromes P450 that serves to coordinate heme pocket hydration with ligand binding and the redox state. Displacement of the conformational equilibrium toward the "closed" state in P450-SS9 (even ligand-free) may have evolved to allow the protein to adapt to enhanced protein hydration at high hydrostatic pressures.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Sineva EV,Davydov DRdoi
10.1021/bi101466ysubject
Has Abstractpub_date
2010-12-21 00:00:00pages
10636-46issue
50eissn
0006-2960issn
1520-4995journal_volume
49pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::A modified form of procollagen was extracted with 10 M urea from the skin of lambs with dermatosparaxis, a disease which is produced by a genetic defect in the conversion of procollagen to collagen. The extracts contained little if any alpha1 and alpha2 chains of normal type I collagen, and instead they contained the ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00658a024
更新日期:1976-06-29 00:00:00
abstract::We investigated the effects of MA-5, a human-specific monoclonal antibody to the insulin receptor alpha-subunit, on transmembrane signaling in cell lines transfected with and expressing both normal human insulin receptors and receptors mutated in their beta-subunit tyrosine kinase domains. In cell lines expressing nor...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00116a025
更新日期:1992-01-14 00:00:00
abstract::Substitution of Co(II) for the catalytic site Zn(II) of horse liver alcohol dehydrogenase (LADH) yields an active enzyme derivative, CoIIE, with characteristic Co(II) charge-transfer and d-d electronic transitions that are sensitive to the events which take place during catalysis [Koerber, S. C., MacGibbon, A. K. H., ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00377a031
更新日期:1987-02-10 00:00:00
abstract::The biosynthesis of ansamycin antibiotics, including rifamycin B, involves the synthesis of an aromatic precursor, 3-amino-5-hydroxybenzoic acid (AHBA), which serves as starter for the assembly of the antibiotics' polyketide backbone. The terminal enzyme of AHBA formation, AHBA synthase, is a dimeric, pyridoxal 5'-pho...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi990018q
更新日期:1999-08-03 00:00:00
abstract::Subunit a of the Escherichia coli ATP synthase is thought to control access of protons to the ring of c subunits during proton-driven ATP synthesis. In this study, the surface exposure of subunit a in the periplasm has been examined using 3-N-maleimidyl-propionyl biocytin labeling in cells permeabilized by polymyxin B...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi026649t
更新日期:2003-01-21 00:00:00
abstract::Factor V and factor Va binding to single bilayer phospholipid vesicles was investigated by light-scattering intensity measurements. This technique allows the measurement of free and phospholipid-bound protein concentrations from which equilibrium constants can be obtained. As controls, the Ca2+-dependent phospholipid ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00587a023
更新日期:1979-10-02 00:00:00
abstract::A heterologous expression system was used to evaluate activation of BlaR1, a sensor/signal transducer protein of Staphylococcus aureus with a central role in resistance to β-lactam antibiotics. In the absence of other S. aureus proteins that might respond to antibiotics and participate in signal transduction events, w...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi300429p
更新日期:2012-06-12 00:00:00
abstract::Protein methylation is a common post-translational modification with diverse biological functions. Methyllysine reader proteins are increasingly a focus of epigenetics research and play important roles in regulating many cellular processes. These reader proteins are vital players in development, cell cycle regulation,...
journal_title:Biochemistry
pub_type: 杂志文章,评审
doi:10.1021/acs.biochem.5b01073
更新日期:2016-03-22 00:00:00
abstract::The properties of the Fe and Mo sites of the iron-molybdenum cofactor of nitrogenase with respect to binding and activation of N(2) have been studied by molecular mechanics calculations on the local protein environment and by density functional theory (DFT) calculations on subsections of the cofactor. The DFT calculat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi025623z
更新日期:2002-11-26 00:00:00
abstract::RecA-catalyzed DNA recombination is initiated by a mandatory, high-energy form of DNA in RecA-nucleoprotein filaments, where bases are highly unstacked and the backbone is highly unwound. Interestingly, only the energetics consequent to adenosine triphosphate (ATP) binding, rather than its hydrolysis, seems sufficient...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi034667k
更新日期:2003-10-21 00:00:00
abstract::The solution structure of an alpha-insect toxin from Buthus martensii Karsch, BmKalphaIT01, has been determined by two-dimensional NMR spectroscopy and molecular modeling techniques. Combining the sequence homology comparison and toxicity bioassays, BmKalphaIT01 has been suggested to be a natural mutant of alpha-insec...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7006788
更新日期:2007-10-09 00:00:00
abstract::The light-induced global conformational change of photoactive yellow protein was directly observed by small-angle X-ray scattering (SAXS). The N-terminal 6, 15, or 23 amino acid residues were enzymatically truncated (T6, T15, or T23, respectively), and their near-UV intermediates were accumulated under continuous illu...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0264768
更新日期:2002-11-19 00:00:00
abstract::Vitamin K dependent carboxylation of an exogenous peptide substrate and endogenous protein substrates, vitamin K epoxidation, and reduction of vitamin K epoxide were measured in subcellular fractions from rat liver. The rough microsomal fraction was highly enriched in all four activities; lower levels were found in sm...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00547a019
更新日期:1980-03-18 00:00:00
abstract::We have used [(1)H-(15)N]-HSQC NMR to investigate the structural changes that occur in both serpin and proteinase in forming the kinetically trapped covalent protein-protein complex that is the basis for serpin inhibition of serine proteinases. By alternately using (15)N-alanine specifically-labeled alpha(1)-proteinas...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010100x
更新日期:2001-05-29 00:00:00
abstract::Kinetics studies in homogeneous aqueous solution showed that solubilized penicillin-binding protein 2a (sPBP2a) of methicillin-resistant Staphylococcus aureus (a bacterial DD-peptidase) was inhibited by the amphiphilic glycolipid antibiotic moenomycin. Inhibition at the peptidase site was determined by competition exp...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi982309p
更新日期:1999-08-10 00:00:00
abstract::Protein S is an anticoagulant protein containing a Gla (enclosing gamma-carboxyglutamic acids) module, a TSR (thrombin sensitive region) module, four EGF (epidermal growth factor)-like modules, and a SHBG (sex hormone binding globulin)-like region. Protein S is a cofactor to activated protein C (APC) in the degradatio...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0601151
更新日期:2006-09-05 00:00:00
abstract::Earlier work indicates that the major DNA repair phosphodiesterase (PDE) in yeast cells is the well-characterized Apn1 protein. Apn1 demonstrates both Mg2+-independent PDE activity and Mg2+-independent class II apurinic/apyrimidinic (AP) endonuclease activity and represents greater than 90% of the activity detected in...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi970048y
更新日期:1997-05-20 00:00:00
abstract::A dipeptide containing the binding site for retinal in bovine rhodopsin has been isolated and its sequence determined. Rhodopsin containing [11-3H]retinal was prepared in chromatographically pure form, and the [3H]retinal was reductively linked to its binding site on opsin by using borane--dimethylamine. The [3H]retin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00563a027
更新日期:1980-10-28 00:00:00
abstract::We have measured T1 and T2 of protein and water protons in hemoglobin solutions using broad-line pulse techniques; selective excitation and detection methods enabled the intrinsic protein and water relaxation rates, as well as the spin-transfer rate between them, to be obtained at 5, 10, and 20 MHz. Water and protein ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00335a004
更新日期:1985-07-02 00:00:00
abstract::Recent results on the 102 residue protein U1A show that protein aggregation is not always slow and irreversible but may take place transiently in refolding studies on a millisecond time scale. In this study we observe a similar aggregation behavior with the classical two-state protein CI2. Since both U1A and CI2 appea...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9909997
更新日期:1999-10-05 00:00:00
abstract::In the native calcium-binding protein calbindin D9k (M(r) 8.700; 75aa; 2 EF-hands), the backbone carbonyl oxygen of Glu60 coordinates the Ca2+ ion in the C-terminal site (site II). The carboxylate group of the same residue forms a hydrogen bond to a water molecule that constitutes a Ca2+ ligand in the N-terminal site ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00207a015
更新日期:1994-10-18 00:00:00
abstract::Fluorescence studies of the binding of IKe gene 5 protein to various polynucleotides were performed to obtain insight into the question as to what extent the binding characteristics of the gene 5 proteins of the IKe and M13 phages resemble and/or differ from each other. The fluorescence of IKe gene 5 protein is quench...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00381a037
更新日期:1987-04-07 00:00:00
abstract::An alanine racemase encoded by a gene from the thermophilic Gram-positive bacterium Bacillus stearothermophilus is overproduced to 0.3% of the soluble protein when carried on plasmid pICR4 in Escherichia coli [Inagaki, K., Tanizawa, K., Badet, B., Walsh, C. T., Tanaka, H., & Soda, K. (1986) Biochemistry (third paper o...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00359a029
更新日期:1986-06-03 00:00:00
abstract::Cyclopropane fatty acid (CFA) synthase of Escherichia coli catalyzes a modification of the acyl chains of phospholipid bilayers. We report (i) identification of the CFA synthase protein, (ii) overproduction (> 600-fold) and purification to essential homogeneity of the enzyme, and (iii) the amino acid sequence of CFA s...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00160a011
更新日期:1992-11-17 00:00:00
abstract::Recently, a new clathrin assembly protein (AP180) has been purified from coated vesicles of bovine brain (Ahle & Ungewickell, 1986). This protein has been shown to promote polymerization of clathrin into a homogeneous population of baskets under conditions where pure clathrin does not polymerize by itself. We have pur...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00416a040
更新日期:1988-08-09 00:00:00
abstract::The amide hydrogens that are exposed to solvent in the high-resolution X-ray structures of ubiquitin, FK506-binding protein, chymotrypsin inhibitor 2, and rubredoxin span a billion-fold range in hydroxide-catalyzed exchange rates which are predictable by continuum dielectric methods. To facilitate analysis of transien...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi901219x
更新日期:2009-10-06 00:00:00
abstract::DNA-dependent synthesis of beta-galactosidase was optimized in extracts made from cells lysed by a standard French pressure cell. Extracts made at 3200 psi synthesized up to 25-fold more beta-galactosidase than extracts made at 7500 psi. beta-Galactosidase synthesis was cyclic 3', 5' AMP dependent, as expected, and in...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00624a016
更新日期:1977-03-08 00:00:00
abstract::Interaction of the peptide antibiotic alamethicin with phospholipid vesicles has been monitored by changes in its circular dichroic and fluorescent properties. The data are consistent with an incorporation of the peptide in the lipid bilayer. Aggregation of alamethicin in the membrane phase is evident from a character...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00384a015
更新日期:1987-05-19 00:00:00
abstract::Fluorescent derivatives of short oligonucleotides of defined sequence were prepared by the incorporation of 5-(propylamino)uridine via current phosphoramidite chemistry, followed by derivatization of the propylamine function with mansyl chloride. These oligomers, annealed to complementary oligomers, yielded short dupl...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00437a014
更新日期:1989-05-30 00:00:00
abstract::Trypanosoma brucei ornithine decarboxylase was reconstituted by coexpression of two polypeptides corresponding to residues 1-305 and residues 306-425 in Escherichia coli. The two peptides were coexpressed, at wild-type levels, from a single transcriptional unit that was separated by a 15-nucleotide untranslated region...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00041a021
更新日期:1995-10-17 00:00:00