JournalDrug metabolism and disposition: the biological fate of chemicals
PubMed ID15523049
Gata factor translation is the final downstream step in the amino acid/tor-mediated vitellogenin gene expression in the anautogenous mosquito aedes aegypti.
'Ingestion of blood is required for vector mosquitoes to initiate reproductive cycles determining their role as vectors of devastating human diseases. Nutritional signaling plays a pivotal role in regulating mosquito reproduction. Transcription of yolk protein precursor genes is repressed until mosquitoes take blood. Previously, we have shown that to signal ... More
Transcriptional effects of chronic Akt activation in the heart.
Authors Cook Stuart A; Matsui Takashi; Li Ling; Rosenzweig Anthony;
JournalJ Biol Chem
PubMed ID11956204
'Akt activation reduces cardiomyocyte death and induces cardiac hypertrophy. To help identify effector mechanisms, gene expression profiles in hearts from transgenic mice with cardiac-specific expression of activated Akt (myr-Akt) were compared with littermate controls. 40 genes were identified as differentially expressed. Quantitative reverse transcription-PCR confirmed qualitative results of transcript profiling ... More
CCAAT/Enhancer Binding Protein alpha Binds to the Epstein-Barr Virus (EBV) ZTA Protein through Oligomeric Interactions and Contributes to Cooperative Transcriptional Activation of the ZTA Promoter through Direct Binding to the ZII and ZIIIB Motifs during Induction of the EBV Lytic Cycle.
AuthorsWu FY, Wang SE, Chen H, Wang L, Hayward SD, Hayward GS,
JournalJ Virol
PubMed ID15078966
'The Epstein-Barr virus (EBV)-encoded ZTA protein interacts strongly with and stabilizes the cellular CCAAT/enhancer binding protein alpha (C/EBPalpha), leading to the induction of p21-mediated G(1) cell cycle arrest. Despite the strong interaction between these two basic leucine zipper (bZIP) family proteins, the ZTA and C/EBPalpha subunits do not heterodimerize, as ... More
Transcriptional Regulation of the Pituitary Vasopressin V1b Receptor Involves a GAGA-binding Protein.
'The role of CT repeats (inverted GAGA box) in the rat vasopressin V1b receptor (V1bR) promoter in the transcriptional regulation of this gene was studied in H32 hypothalamic cells, which express endogenous V1bR. Transfection of a 2.5-kb V1bR fragment (2161 bp upstream and 377 bp downstream of the proximal transcriptional ... More
Molecular basis defining human Chlamydia trachomatis tissue tropism. A possible role for tryptophan synthase.
Authors Fehlner-Gardiner Christine; Roshick Christine; Carlson John H; Hughes Scott; Belland Robert J; Caldwell Harlan D; McClarty Grant;
JournalJ Biol Chem
PubMed ID12011099
Here we report the cloning and sequencing of a region of the chlamydiae chromosome termed the
Cytosolic Hydroxymethyldihydropterin Pyrophosphokinase/Dihydropteroate Synthase from Arabidopsis thaliana: A SPECIFIC ROLE IN EARLY DEVELOPMENT AND STRESS RESPONSE.
AuthorsStorozhenko S, Navarrete O, Ravanel S, De Brouwer V, Chaerle P, Zhang GF, Bastien O, Lambert W, Rébeillé F, Van Der Straeten D,
JournalJ Biol Chem
PubMed ID17289662
In plants, 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase/7,8-dihydropteroate synthase (mitHPPK/DHPS) is a bifunctional mitochondrial enzyme, which catalyzes the first two consecutive steps of tetrahydrofolate biosynthesis. Mining the Arabidopsis genome data base has revealed a second gene encoding a protein that lacks a potential transit peptide, suggesting a cytosolic localization of the isoenzyme (cytHPPK/DHPS). When ... More
The amino acid sequence of a plastid protein is developmentally regulated by RNA editing.
Authors Karcher Daniel; Bock Ralph;
JournalJ Biol Chem
PubMed ID11734554
RNA editing in plant organelles post-transcriptionally alters single nucleotides by C-to-U or U-to-C conversions at highly specific sites. Plant editing is generally viewed as a repair mechanism acting at the transcript level by restoring conserved amino acid residues. Here we report that an editing reaction within the ndhB transcript (encoding ... More
Natural alleles at a tomato fruit size quantitative trait locus differ by heterochronic regulatory mutations.
Authors Cong Bin; Liu Jiping; Tanksley Steven D;
JournalProc Natl Acad Sci U S A
PubMed ID12370431
fw2.2 is a major quantitative trait locus that accounts for as much as 30% of the difference in fruit size between wild and cultivated tomatoes. Evidence thus far indicates that fw2.2 alleles modulate fruit size through changes in gene regulation rather than in the FW2.2 protein itself. To investigate the ... More
Exploring the transcriptome of the malaria sporozoite stage.
Authors Kappe S H; Gardner M J; Brown S M; Ross J; Matuschewski K; Ribeiro J M; Adams J H; Quackenbush J; Cho J; Carucci D J; Hoffman S L; Nussenzweig V;
JournalProc Natl Acad Sci U S A
PubMed ID11493695
Most studies of gene expression in Plasmodium have been concerned with asexual and/or sexual erythrocytic stages. Identification and cloning of genes expressed in the preerythrocytic stages lag far behind. We have constructed a high quality cDNA library of the Plasmodium sporozoite stage by using the rodent malaria parasite P. yoelii, ... More
The forkhead transcription factor AFX activates apoptosis by induction of the BCL-6 transcriptional repressor.
Authors Tang Tracy Tzu-Ling; Dowbenko Donald; Jackson Amanda; Toney Lisa; Lewin David A; Dent Alexander L; Lasky Laurence A;
JournalJ Biol Chem
PubMed ID11777915
The activation of the AKT/protein kinase B kinases by mutation of the PTEN lipid phosphatase results in enhanced survival of a diversity of tumors. This resistance to apoptosis is partly accomplished by the inhibition of genetic programs induced by a subfamily of forkhead transcription factors including AFX. Here we describe ... More
Ascorbic-acid transporter Slc23a1 is essential for vitamin C transport into the brain and for perinatal survival.
Authors Sotiriou Sotiria; Gispert Suzana; Cheng Jun; Wang Yaohui; Chen Amy; Hoogstraten-Miller Shelley; Miller Georgina F; Kwon Oran; Levine Mark; Guttentag Susan H; Nussbaum Robert L;
JournalNat Med
PubMed ID11984580
The only proven requirement for ascorbic acid (vitamin C) is in preventing scurvy, presumably because it is a cofactor for hydroxylases required for post-translational modifications that stabilize collagen. We have created mice deficient in the mouse ortholog (solute carrier family 23 member 1 or Slc23a1) of a rat ascorbic-acid transporter, ... More
A novel lipoarabinomannan from the equine pathogen Rhodococcus equi. Structure and effect on macrophage cytokine production.
Rhodococcus equi is a major cause of foal morbidity and mortality. We have investigated the presence of lipoglycan in this organism as closely related bacteria, notably Mycobacterium tuberculosis, produce lipoarabinomannans (LAM) that may play multiple roles as virulence determinants. The lipoglycan was structurally characterized by gas chromatography-mass spectrometry following permethylation, ... More
Characterization of rat NDRG2 (N-Myc downstream regulated gene 2), a novel early mineralocorticoid-specific induced gene.
The early phase of the stimulatory action of aldosterone on sodium reabsorption in tight epithelia involves hormone-regulated genes that remain to be identified. Using a subtractive hybridization technique on isolated renal cortical collecting ducts from rats injected with a physiological dose of aldosterone, we have identified an early response cDNA ... More
Mutations in the occQ Operator That Decrease OccR-induced DNA Bending Do Not Cause Constitutive Promoter Activity.
Authors Akakura Reiko; Winans Stephen C;
JournalJ Biol Chem
PubMed ID11877409
OccR is a LysR-type transcriptional regulator of Agrobacterium tumefaciens that positively regulates the octopine catabolism operon of the Ti plasmid. Positive control of the occ genes occurs in response to octopine, a metabolite released from plant tumors. Octopine causes DNA-bound OccR to undergo a conformational change from an inactive to ... More