Spt5 cooperates with human immunodeficiency virus type 1 Tat by preventing premature RNA release at terminator sequences.

abstract：:p105 (NFKB1) acts in a dual way as a cytoplasmic IkappaB molecule and as the source of the NF-kappaB p50 subunit upon processing. p105 can form various heterodimers with other NF-kappaB subunits, including its own processing product, p50, and these complexes are signal responsive. Signaling through the IkappaB kinase ...

journal_title：Molecular and cellular biology

authors： Heissmeyer V,Krappmann D,Hatada EN,Scheidereit C

更新日期：2001-02-01 00:00:00

abstract：:The 5' ends of dihydrofolate reductase (DHFR)-specific transcripts have been mapped in the 5'-flanking region of the amplified DHFR gene of the human methotrexate-resistant cell line 6A3 by primer extension and S1 protection experiments. The main 5' end, at position -71 relative to the first nucleotide of the DHFR rea...

journal_title：Molecular and cellular biology

authors： Masters JN,Attardi G

更新日期：1985-03-01 00:00:00

abstract：:Cotranslational insertion of type I collagen chains into the lumen of the endoplasmic reticulum (ER) and their subsequent folding into a heterotrimeric helix is a complex process which requires coordinated action of the translation machinery, components of translocons, molecular chaperones, and modifying enzymes. Here...

journal_title：Molecular and cellular biology

authors： Stefanovic B,Stefanovic L,Schnabl B,Bataller R,Brenner DA

更新日期：2004-02-01 00:00:00

abstract：:In heat-shocked tomato cell cultures, cytoplasmic heat shock granules (HSGs) are tightly associated with a specific subset of mRNAs coding mainly for the untranslated control proteins. This messenger ribonucleoprotein complex was banded in a CsCl gradient after fixation with formaldehyde (approximately 1.30 g/cm3). It...

journal_title：Molecular and cellular biology

authors： Nover L,Scharf KD,Neumann D

更新日期：1989-03-01 00:00:00

abstract：:Wild-type strains of Saccharomyces cerevisiae exhibit mitotic recombination between the chimeric plasmid TLC-1 and the endogenous 2mu circle that involves sequence homologies between the two plasmids that are not acted on by the 2mu circle site-specific recombination system. This generalized recombination can be detec...

journal_title：Molecular and cellular biology

authors： Whiteway MS,Ahmed A

更新日期：1984-01-01 00:00:00

abstract：:Plasmids carrying the herpes simplex virus thymidine kinase (tk) gene were used to transfect thymidine kinase-deficient cells of the mouse fibroblast cell line LM(tk-). Individual cell clones were cultivated in selective hypoxanthine-aminopterin-thymidine medium to determine the number of integrated plasmid copies whi...

journal_title：Molecular and cellular biology

authors： Pülm W,Knippers R

更新日期：1985-02-01 00:00:00

abstract：:The coordinated expression of CD4 and CD8 during T-cell development is tightly coupled with the maturation state of the T cell. Additionally, the mutually exclusive expression of these receptors in mature T cells is representative of the functional T-cell subclasses (CD4+ helper T cells versus CD8+ cytotoxic T cells)....

journal_title：Molecular and cellular biology

authors： Wurster AL,Siu G,Leiden JM,Hedrick SM

更新日期：1994-10-01 00:00:00

abstract：:The divergently transcribed DIT1 and DIT2 genes of Saccharomyces cerevisiae, which belong to the mid-late class of sporulation-specific genes, are subject to Ssn6-Tup1-mediated repression in mitotic cells. The Ssn6-Tup1 complex, which is required for repression of diverse sets of coordinately regulated genes, is known...

journal_title：Molecular and cellular biology

authors： Rothfels K,Tanny JC,Molnar E,Friesen H,Commisso C,Segall J

更新日期：2005-08-01 00:00:00

abstract：:We sought to study the binding constraints placed on the nine-zinc-finger protein transcription factor IIIA (TFIIIA) by a histone octamer. To this end, five overlapping fragments of the Xenopus laevis oocyte and somatic 5S rRNA genes were reconstituted into nucleosomes, and it was subsequently shown that nucleosome tr...

journal_title：Molecular and cellular biology

authors： Howe L,Ausió J

更新日期：1998-03-01 00:00:00

abstract：:Mediator is a general coactivator complex connecting transcription activators and RNA polymerase II. Recent work has shown that the nuclear receptor-interacting MED1/TRAP220 subunit of Mediator is required for peroxisome proliferator-activated receptor gamma (PPARgamma)-stimulated adipogenesis of mouse embryonic fibro...

journal_title：Molecular and cellular biology

authors： Ge K,Cho YW,Guo H,Hong TB,Guermah M,Ito M,Yu H,Kalkum M,Roeder RG

更新日期：2008-02-01 00:00:00

abstract：:Mitogen-activated protein (MAP) kinase phosphatase 1 (MKP-1) has been shown to play a critical role in mediating the feedback control of MAP kinase cascades in a variety of cellular processes, including proliferation and stress responsiveness. Although MKP-1 expression is induced by a broad array of extracellular stim...

journal_title：Molecular and cellular biology

authors： Li J,Gorospe M,Hutter D,Barnes J,Keyse SM,Liu Y

更新日期：2001-12-01 00:00:00

abstract：:HMGN proteins promote chromatin unfolding, enhance access to nucleosomes, and modulate transcription from chromatin templates. It is not known whether they act indiscriminately as general modulators of transcription or whether they regulate specific gene expression. Here, we investigated the role of HMGN3, a recently ...

journal_title：Molecular and cellular biology

authors： West KL,Castellini MA,Duncan MK,Bustin M

更新日期：2004-05-01 00:00:00

abstract：:A transcriptional initiator (Inr) for mammalian RNA polymerase II can be defined as a DNA sequence element that overlaps a transcription start site and is sufficient for (i) determining the start site location in a promoter that lacks a TATA box and (ii) enhancing the strength of a promoter that contains a TATA box. W...

journal_title：Molecular and cellular biology

authors： Javahery R,Khachi A,Lo K,Zenzie-Gregory B,Smale ST

更新日期：1994-01-01 00:00:00

abstract：:The ErbB family includes four homologous transmembrane tyrosine kinases. Whereas ErbB-1 binds to the epidermal growth factor (EGF), both ErbB-3 and ErbB-4 bind to the Neu differentiation factors (NDFs, or neuregulins), and ErbB-2, the most oncogenic family member, is an orphan receptor whose function is still unknown....

journal_title：Molecular and cellular biology

authors： Tzahar E,Waterman H,Chen X,Levkowitz G,Karunagaran D,Lavi S,Ratzkin BJ,Yarden Y

更新日期：1996-10-01 00:00:00

abstract：:We isolated the gene for citrate synthase (citrate oxaloacetate lyase; EC 4.1.3.7) from Saccharomyces cerevisiae and ablated it by inserting the yeast LEU2 gene within its reading frame. This revealed a second, nonmitochondrial citrate synthase. Like the mitochondrial enzyme, this enzyme was sensitive to glucose repre...

journal_title：Molecular and cellular biology

authors： Rickey TM,Lewin AS

更新日期：1986-02-01 00:00:00

abstract：:FUD6, a nonphotosynthetic mutant of Chlamydomonas reinhardtii, was previously found to be deficient in the synthesis of subunit IV of the cytochrome b6/f complex, the chloroplast petD gene product (C. Lemaire, J. Girard-Bascou, F.-A. Wollman, and P. Bennoun, Biochim. Biophys. Acta 851:229-238, 1986). The lesion in FUD...

journal_title：Molecular and cellular biology

authors： Sturm NR,Kuras R,Büschlen S,Sakamoto W,Kindle KL,Stern DB,Wollman FA

更新日期：1994-09-01 00:00:00

abstract：:The translational GTPases promote initiation, elongation, and termination of protein synthesis by interacting with the ribosome. Mutations that impair GTP hydrolysis by eukaryotic translation initiation factor 5B/initiation factor 2 (eIF5B/IF2) impair yeast cell growth due to failure to dissociate from the ribosome fo...

journal_title：Molecular and cellular biology

authors： Shin BS,Kim JR,Acker MG,Maher KN,Lorsch JR,Dever TE

更新日期：2009-02-01 00:00:00

abstract：:In addition to the highly conserved AATAAA sequence, there is a requirement for specific sequences downstream of polyadenylic acid [poly(A)] cleavage sites to generate correct mRNA 3' termini. Previous experiments demonstrated that 35 nucleotides downstream of the E2A poly(A) site were sufficient but 20 nucleotides we...

journal_title：Molecular and cellular biology

authors： Hart RP,McDevitt MA,Ali H,Nevins JR

更新日期：1985-11-01 00:00:00

abstract：:To study DNA topological requirements for homologous recombination in plants, we have constructed pairs of plasmids that contain nonoverlapping deletions in the neomycin phosphotransferase gene [APH(3')II], which, when intact, confers kanamycin resistance to plant cells. Protoplasts isolated from Nicotiana tabacum wer...

journal_title：Molecular and cellular biology

authors： Baur M,Potrykus I,Paszkowski J

更新日期：1990-02-01 00:00:00

abstract：:Ribosomal (r) proteins encoded by polyadenylated RNA were specifically precipitated in vitro from polysomes by using antibodies raised against characterized Drosophila melanogaster r proteins. The immuno-purified mRNA in the polysome complex was used to prepare cDNA with which to probe a D. melanogaster genomic librar...

journal_title：Molecular and cellular biology

authors： Burns DK,Stark BC,Macklin MD,Chooi WY

更新日期：1984-12-01 00:00:00

abstract：:Iron is an essential micronutrient for all eukaryotic organisms because it participates as a redox-active cofactor in many biological processes, including DNA replication and repair. Eukaryotic ribonucleotide reductases (RNRs) are Fe-dependent enzymes that catalyze deoxyribonucleoside diphosphate (dNDP) synthesis. We ...

journal_title：Molecular and cellular biology

authors： Sanvisens N,Romero AM,An X,Zhang C,de Llanos R,Martínez-Pastor MT,Bañó MC,Huang M,Puig S

更新日期：2014-09-01 00:00:00

abstract：:The major cytoskeletal actin gene of Drosophila melanogaster, the actin 5C gene, has two promoters, the distal one of which controls synthesis of actin in a tissue- and developmental stage-specific manner. This very strong promoter has widely been used for expression of heterologous genes in cultured cells. To locate ...

journal_title：Molecular and cellular biology

authors： Chung YT,Keller EB

更新日期：1990-12-01 00:00:00

abstract：:The glucose-activated transcription factor carbohydrate response element binding protein (ChREBP) induces the expression of hepatic glycolytic and lipogenic genes. The farnesoid X receptor (FXR) is a nuclear bile acid receptor controlling bile acid, lipid, and glucose homeostasis. FXR negatively regulates hepatic glyc...

journal_title：Molecular and cellular biology

authors： Caron S,Huaman Samanez C,Dehondt H,Ploton M,Briand O,Lien F,Dorchies E,Dumont J,Postic C,Cariou B,Lefebvre P,Staels B

更新日期：2013-06-01 00:00:00

abstract：:Our current knowledge of recombination hot spot activity in mammalian systems implicates a role for both the primary DNA sequence and the nature of the chromatin domain around it. In mice, the only recombination hot spots mapped to date have been confined to a cluster within the major histocompatibility complex (MHC) ...

journal_title：Molecular and cellular biology

authors： Nishant KT,Ravishankar H,Rao MR

更新日期：2004-06-01 00:00:00

abstract：:Alpha-catenin, an integral part of cadherin-catenin adhesion complexes, is a major binding partner of beta-catenin, a key component of the Wnt pathway, which activates T-cell factor (TCF)/lymphoid enhancer factor (LEF) transcription and is often upregulated in cancers. Recently, we identified an alpha-catenin-related ...

journal_title：Molecular and cellular biology

authors： Merdek KD,Nguyen NT,Toksoz D

更新日期：2004-03-01 00:00:00

abstract：:We describe experiments which demonstrated that the simian virus 40 (SV40) enhancer affects certain transcriptional units differently. We also found that a specific enhancer-transcriptional unit interaction can be regulated by trans-acting factors. Using transient assays, we examined the effects of the SV40 enhancer o...

journal_title：Molecular and cellular biology

authors： Robbins PD,Rio DC,Botchan MR

更新日期：1986-04-01 00:00:00

abstract：:Incubation of WEHI 231 cells, derived from a murine B-cell lymphoma, with antisera directed against its surface immunoglobulin results in the inhibition of growth within 24 h. Previously, we demonstrated that this treatment selectively affects cytoplasmic levels of c-myc mRNA (J. E. McCormack, V. H. Pepe, R. B. Kent, ...

journal_title：Molecular and cellular biology

authors： Levine RA,McCormack JE,Buckler A,Sonenshein GE

更新日期：1986-11-01 00:00:00

abstract：:The tumor necrosis factor alpha (TNF-alpha) gene is rapidly activated by lipopolysaccharide (LPS). Here, we show that extracellular signal-regulated kinase (ERK) kinase activity but not calcineurin phosphatase activity is required for LPS-stimulated TNF-alpha gene expression. In LPS-stimulated macrophages, the ERK sub...

journal_title：Molecular and cellular biology

authors： Tsai EY,Falvo JV,Tsytsykova AV,Barczak AK,Reimold AM,Glimcher LH,Fenton MJ,Gordon DC,Dunn IF,Goldfeld AE

更新日期：2000-08-01 00:00:00

abstract：:B-lymphocyte development requires the basic helix-loop-helix proteins encoded by the E2A gene. In this study, the control mechanism of E2A was further explored by disruption of the E2A-related genes, E2-2 and HEB. In contrast to E2A, E2-2 and HEB are not essential for the establishment of the B-cell lineage. However, ...

journal_title：Molecular and cellular biology

authors： Zhuang Y,Cheng P,Weintraub H

更新日期：1996-06-01 00:00:00

abstract：:During aging, cellular plasticity and senescence play important roles in tissue regeneration and the pathogenesis of different diseases, including cancer. We have recently shown that senescent breast luminal cells can activate their adjacent stromal fibroblasts. In the present report, we present clear evidence that th...

journal_title：Molecular and cellular biology

authors： Al-Khalaf HH,Ghebeh H,Wakil SM,Al-Mohanna F,Aboussekhra A

更新日期：2020-04-13 00:00:00