Abstract:
:Doxorubicin (DOX) is a chemotherapeutic that is used in the treatment of a wide variety of cancers. However, it causes cardiotoxicity partly because of the formation of reactive oxygen species. CYP2J2 is a human cytochrome P450 that is strongly expressed in cardiomyocytes. It converts arachidonic acid (AA) into four different regioisomers of epoxyeicosatrienoic acids (EETs). Using kinetic analyses, we show that AA metabolism by CYP2J2 is modulated by DOX. We show that cytochrome P450 reductase, the redox partner of CYP2J2, metabolizes DOX to 7-deoxydoxorubicin aglycone (7-de-aDOX). This metabolite then binds to CYP2J2 and inhibits and alters the preferred site of metabolism of AA, leading to a change in the ratio of the EET regioisomers. Furthermore, molecular dynamics simulations indicate that 7-de-aDOX and AA can concurrently bind to the CYP2J2 active site to produce these changes in the site of AA metabolism. To determine if these observations are unique to DOX/7-de-aDOX, we use noncardiotoxic DOX analogues, zorubicin (ZRN) and 5-iminodaunorubicin (5-IDN). ZRN and 5-IDN inhibit CYP2J2-mediated AA metabolism but do not change the ratio of EET regioisomers. Altogether, we demonstrate that DOX and 7-de-aDOX inhibit CYP2J2-mediated AA metabolism and 7-de-aDOX binds close to the active site to alter the ratio of cardioprotective EETs. These mechanistic studies of CYP2J2 can aid in the design of new alternative DOX derivatives.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Arnold WR,Baylon JL,Tajkhorshid E,Das Adoi
10.1021/acs.biochem.7b01025subject
Has Abstractpub_date
2017-12-26 00:00:00pages
6700-6712issue
51eissn
0006-2960issn
1520-4995journal_volume
56pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::The effects of structural modifications of the flavin mononucleotide (FMN) prosthetic group of Clostridium pasteurianum flavodoxin on the kinetics of electron transfer to the oxidized form (from 5-deazariboflavin semiquinone produced by laser flash photolysis) and from the semiquinone form (to horse heart cytochrome c...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00281a034
更新日期:1983-06-07 00:00:00
abstract::DADH catalyzes the flavin-dependent oxidative deamination of d-amino acids to the corresponding α-keto acids and ammonia. Here we report the first X-ray crystal structures of DADH at 1.06 Å resolution and its complexes with iminoarginine (DADH(red)/iminoarginine) and iminohistidine (DADH(red)/iminohistidine) at 1.30 Å...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi1005865
更新日期:2010-10-05 00:00:00
abstract::The Fv fragment, a univalent antigen-binding unit with a molecular weight of 25,000, has successfully been prepared in high yield by limited proteolysis with clostripain of a short-chain mouse IgG2a anti-dansyl monoclonal antibody in which the entire CH1 domain is deleted [Igarashi, T., Sato, M., Takio, K., Tanaka, T....
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00225a016
更新日期:1991-03-19 00:00:00
abstract::Plasma kallikrein (Fletcher factor) is a hepatic serine proteinase that participated in the early phase of blood coagulation. From two genomic libraries, we succeeded to isolate four overlapping clones representing the entire rat plasma kallikrein gene. Using selective DNA sequencing, polymerase chain reactions, and r...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00220a027
更新日期:1991-02-12 00:00:00
abstract::As part of a search for peptides that have specificity for selected protein kinases, the possibility that adenosine cyclic 3',5'-phosphate dependent protein kinase (A-kinase) recognizes the hydrogen-bonding potential of its peptide substrates was investigated. A-Kinase catalyzes the phosphorylation of five N alpha-met...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00388a041
更新日期:1987-07-14 00:00:00
abstract::The high-frequency resonance Raman spectra of FeIII yeast native cytochrome c peroxidase (CCP) and five of its mutants [CCP(MI), Phe-51, Leu-48, Lys-48, Asn-235, and Phe-191] were recorded in phosphate buffer, pH 7.0, and in glycerol/phosphate mixtures at 295 and 10 K. Glycerol induces heme coordination changes in som...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00438a024
更新日期:1989-06-13 00:00:00
abstract::We detect internal water molecules in a membrane-embedded receptor-transducer complex and demonstrate water structure changes during formation of the signaling state. Time-resolved FTIR spectroscopy reveals stimulus-induced repositioning of one or more structurally active water molecules to a significantly more hydrop...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi802180a
更新日期:2009-02-10 00:00:00
abstract::The carbon monoxide binding curve to human hemoglobin A0 has been measured to high precision in experimental conditions of 600 microM heme, 0.1 M N-(2-hydroxyethyl)piperazine-N'-2-ethanesulfonic acid, 0.1 M NaCl, 10 mM inositol hexaphosphate, 1 mM disodium ethylenediaminetetraacetic acid, pH 6.94, and 25 degrees C. Co...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00394a031
更新日期:1987-10-06 00:00:00
abstract::Several snake venoms contain a phospholipase A2 in which position 49 in the active site is occupied by a lysine or a serine instead of the aspartate residue normally found. Although these proteins do not bind Ca2+ and are devoid of catalytic activity, they are still highly specific myotoxins and have recently been sho...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00014a021
更新日期:1995-04-11 00:00:00
abstract::The data and approach reported in paper I (Hanlon et al., 1975, preceding paper) have been used to calculate the fractional changes in secondary structure of calf thymus deoxyribonucleic acid which occur in aqueous solutions as a function of the concentration of NaCl, KCl, LiCl, CsCl, and NH4Cl. There is a continuous ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00679a018
更新日期:1975-04-22 00:00:00
abstract::Difference Fourier transform infrared spectra of lumirhodopsin, metarhodopsin I, and metarhodopsin II versus rhodopsin were recorded with hydrated films of bovine rod outer segments at 200, 240, and 270 K. In the region between 3700 and 3450 cm-1, the O-H stretching vibrational bands of water were identified by H(2)18...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00096a013
更新日期:1993-11-16 00:00:00
abstract::The C-terminal domain (CT) of apolipoprotein E (apoE), a critical protein involved in cholesterol transport in the plasma and brain, plays an important role in high-affinity lipoprotein binding. Although high-resolution structural information is available for the N-terminal domain of apoE, the structural organization ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi901902e
更新日期:2010-03-02 00:00:00
abstract::The involvement of Cl(-) and several other monovalent anions in photosynthetic oxygen evolution was studied using photosystem II membranes depleted of Cl(-) by dialysis. The results of these studies differ significantly from results obtained using other depletion methods. Binding studies with glycerol as a cryoprotect...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi026175y
更新日期:2003-02-25 00:00:00
abstract::The binding to rat brain synaptosomes of a beta-scorpion toxin, i.e., toxin II of Centruroides suffusus suffusus (Css II), was studied as a function of pH, temperature, and concentration of some monovalent and divalent cations. At 10 degrees C and pH 6.0, the specific binding of 125I-labeled Css II corresponds to a si...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00301a018
更新日期:1984-03-13 00:00:00
abstract::The peptidyl trifluoromethyl ketones Ac-Phe-CF3 (1) and Ac-Leu-Phe-CF3 (2) are inhibitors of chymotrypsin. They differ in Ki (20 and 2 microM, respectively) as well as in their kinetics of association with chymotrypsin in that 1 is rapidly equilibrating, with an association rate too fast to be observed by steady-state...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00485a009
更新日期:1990-08-21 00:00:00
abstract::Intact rat liver mitochondria were treated with compounds derived from the reaction of fluorescamine with various types of primary amines, including the mycosamine-containing antibiotics amphotericin B and nystatin. The effect of varying amounts of these compounds on ATPase-linked inorganic phosphate (Pi) formation on...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00550a031
更新日期:1980-04-29 00:00:00
abstract::Identification of the kinetic intermediates in GTP hydrolysis on microtubules and characterization of their assembly properties is essential in understanding microtubule dynamics. By using an improved glass filter assay that selectively traps microtubules with a dead time of 2 s and monitoring taxol-induced rapid asse...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00490a007
更新日期:1990-09-25 00:00:00
abstract::The compounds 3-hydroxy-4-nitrobenzaldehyde and 3-hydroxy-4-nitrobenzyl alcohol are introduced as new chromophoric substrates for probing the catalytic mechanism of horse liver alcohol dehydrogenase (LADH). Ionization of the phenolic hydroxyl group shifts the spectrum of the aldehyde from 360 to 433 nm (pKa = 6.0), wh...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00385a017
更新日期:1987-06-02 00:00:00
abstract::The interaction of the C-terminal octapeptide of cholecystokinin, CCK-8, with the third extracellular loop of human cholecystokinin-A receptor, CCK(A)-R(329-357), has been probed by high-resolution NMR and extensive computer simulations. The structure of CCK(A)-R(329-357) in the presence of dodecylphosphocholine micel...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi002659n
更新日期:2001-04-03 00:00:00
abstract::Fructose-1,6-bisphosphate muscle aldolase is an essential glycolytic enzyme that catalyzes reversible carbon-carbon bond formation by cleaving fructose 1,6-bisphosphate to yield dihydroxyacetone phosphate (DHAP) and d-glyceraldehyde phosphate. To elucidate the mechanistic role of conserved amino acid Asp-33, Asn-33 an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi8021558
更新日期:2009-06-02 00:00:00
abstract::OleD is shown to play a key reductive role in the generation of alkenes (olefins) from acyl thioesters in Stenotrophomonas maltophilia. The gene coding for OleD clusters with three other genes, oleABC, and all appear to be transcribed in the same direction as an operon in various olefin producing bacteria. In this stu...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi201096w
更新日期:2011-11-08 00:00:00
abstract::Beta-catenin phosphorylation at serine 45 (Ser45), threonine 41 (Thr41), Ser37, and Ser33 is critical for beta-catenin degradation, and regulation of beta-catenin phosphorylation is a central part of the canonical Wnt signaling pathway. Beta-catenin mutations at Ser45, Thr41, Ser37, and Ser33 perturb beta-catenin degr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0601149
更新日期:2006-04-25 00:00:00
abstract::IHF and HU are small basic proteins of eubacteria that bind as homodimers to double-stranded DNA and bend the duplex to promote architectures required for gene regulation. These architectural proteins share a common alpha/beta fold but exhibit different nucleic acid binding surfaces and distinct functional roles. With...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7009426
更新日期:2008-03-25 00:00:00
abstract::A photoaffinity probe for corticotropin (ACTH) receptors was prepared by selective modification of the single tryptophan residue in ACTH. A new photoreactive agent, 2,4-dinitro-5-azidophenylsulfenyl chloride, was synthesized and used for introducing the photoreactive group into ACTH. 2,4-Dinitro-5-azidophenylsulfenyl-...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00555a027
更新日期:1980-07-08 00:00:00
abstract::Perturbations within the transactivation and carboxy-terminal domains of HIV-1 Rev were examined for effects on Rev responsive element (RRE) binding activities in vitro and biological activity in vivo. Binding affinities, specificities, and multimerization of the transactivation mutants M10 and Rev/Rex M10-16 on the R...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00085a028
更新日期:1993-08-31 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
pub_type: 杂志文章
doi:10.1021/bi00346a070
更新日期:1985-12-03 00:00:00
abstract::Our previous studies revealed that interaction of fibrin with the very low density lipoprotein (VLDL) receptor plays a prominent role in transendothelial migration of leukocytes and thereby inflammation. The major goal of our subsequent studies is to establish the structural basis for this interaction. As the first st...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b00349
更新日期:2018-07-31 00:00:00
abstract::B₁₂-dependent enzymes employ radical species with exceptional prowess to catalyze some of the most chemically challenging, thermodynamically unfavorable reactions. However, dealing with highly reactive intermediates is an extremely demanding task, requiring sophisticated control strategies to prevent unwanted side rea...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi500050k
更新日期:2014-06-17 00:00:00
abstract::Phospholamban (PLB) is a major target of the beta-adrenergic cascade in the heart, and functions to modulate rate-limiting conformational transitions involving the transport activity of the Ca-ATPase. To investigate structural changes within the Ca-ATPase that result from the phosphorylation of PLB by cAMP-dependent p...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi990599j
更新日期:1999-06-22 00:00:00
abstract::There are a small number of peptides derived from proteins that have a propensity to adopt structure in aqueous solution which is similar to the structure they possess in the parent protein. There are far fewer examples of protein fragments which adopt stable nonnative structures in isolation. Understanding how nonnat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi990320z
更新日期:1999-06-01 00:00:00