The metazoan-specific mediator subunit 26 (Med26) is essential for viability and is found at both active genes and pericentric heterochromatin in Drosophila melanogaster.

abstract：:We have isolated a partial cDNA clone containing sequences complementary to a mRNA encoding a 34- to 36-kilodalton normal chicken cell protein which is a substrate for pp60v-src kinase activity. Using this 34-kilodalton cDNA clone as a probe, we determined that the size of the 34-kilodalton mRNA was 1,100 nucleotides ...

journal_title：Molecular and cellular biology

authors： Tomasiewicz HG,Cook-Deegan R,Chikaraishi DM

更新日期：1984-09-01 00:00:00

abstract：:The steroid hormone progesterone acts via high-affinity nuclear receptors that interact with specific DNA sequences located near the promoter of the hormone-responsive gene. Recent studies suggested that the hormone-occupied progesterone receptor (PR) mediates gene activation by recruiting a cellular coregulatory fact...

journal_title：Molecular and cellular biology

authors： Xu Y,Klein-Hitpass L,Bagchi MK

更新日期：2000-03-01 00:00:00

abstract：:The major histocompatibility complex class II (MHC-II) locus includes a dense cluster of genes that function to initiate immune responses. Expression of insulator CCCTC binding factor (CTCF) was found to be required for expression of all MHC class II genes associated with antigen presentation. Ten CTCF sites that divi...

journal_title：Molecular and cellular biology

authors： Majumder P,Boss JM

更新日期：2010-09-01 00:00:00

abstract：:To determine the effect of gene order on globin gene developmental regulation, we produced transgenic mice containing two tandemly arranged gamma- or beta-globin or gamma beta- and beta gamma-globin genes linked to a 2.5-kb cassette containing sequences of the locus control region (LCR). Analysis of constructs contain...

journal_title：Molecular and cellular biology

authors： Peterson KR,Stamatoyannopoulos G

更新日期：1993-08-01 00:00:00

abstract：:The PHR1 gene of Saccharomyces cerevisiae encodes a photolyase which repairs specifically and exclusively pyrimidine dimers, the most frequent lesions induced in DNA by far-UV radiation. We have asked whether expression of PHR1 is modulated in response to UV-induced DNA damage and to DNA-damaging agents that induce le...

journal_title：Molecular and cellular biology

authors： Sebastian J,Kraus B,Sancar GB

更新日期：1990-09-01 00:00:00

abstract：:Forkhead (Fkh) transcription factors influence cell death, proliferation, and differentiation and the cell cycle. In Saccharomyces cerevisiae, Fkh2 both activates and represses transcription of CLB2, encoding a B-type cyclin. CLB2 is expressed during G(2)/M phase and repressed during G(1). Fkh2 recruits the coactivato...

journal_title：Molecular and cellular biology

authors： Sherriff JA,Kent NA,Mellor J

更新日期：2007-04-01 00:00:00

abstract：:MEK kinase 1 (MEKK1) is a 196-kDa protein that, in response to genotoxic agents, was found to undergo phosphorylation-dependent activation. The expression of kinase-inactive MEKK1 inhibited genotoxin-induced apoptosis. Following activation by genotoxins, MEKK1 was cleaved in a caspase-dependent manner into an active 9...

journal_title：Molecular and cellular biology

authors： Widmann C,Gerwins P,Johnson NL,Jarpe MB,Johnson GL

更新日期：1998-04-01 00:00:00

abstract：:Autophagy is considered an adaptive mechanism against hyperosmotic stress. Although the process has been reported to be triggered by the inhibition of mTORC1, the precise downstream mechanisms remain elusive. Here, we demonstrate that hyperosmotic-stress-induced autophagy is different from conventional macroautophagy ...

journal_title：Molecular and cellular biology

authors： Tamura N,Kageyama S,Komatsu M,Waguri S

更新日期：2019-07-29 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：:A mutation (K38R) which specifically eliminates kinase activity was created in the Drosophila melanogaster ckI gene (doubletime [dbt]). In vitro, DBT protein carrying the K38R mutation (DBT(K/R)) interacted with Period protein (PER) but lacked kinase activity. In cell culture and in flies, DBT(K/R) antagonized the pho...

journal_title：Molecular and cellular biology

authors： Muskus MJ,Preuss F,Fan JY,Bjes ES,Price JL

更新日期：2007-12-01 00:00:00

abstract：:Nucleosomes were reconstituted in vitro with several singly end-labeled restriction fragments derived from a cloned somatic-type 5S RNA gene of Xenopus laevis and purified nucleosome core particles from Xenopus cultured cells or chicken erythrocytes. Nucleosome locations were determined by digestion of the reconstitut...

journal_title：Molecular and cellular biology

authors： Gottesfeld JM

更新日期：1987-05-01 00:00:00

abstract：:Considering the link between plasma high-density lipoprotein (HDL) cholesterol levels and a protective effect against coronary artery disease as well as the suggested beneficial effects of retinoids on the production of the major HDL apolipoprotein (apo), apo A-I, the goal of this study was to analyze the influence of...

journal_title：Molecular and cellular biology

authors： Vu-Dac N,Schoonjans K,Kosykh V,Dallongeville J,Heyman RA,Staels B,Auwerx J

更新日期：1996-07-01 00:00:00

abstract：:ZO-1, ZO-2, and ZO-3 are closely related MAGUK family proteins that localize at the cytoplasmic surface of tight junctions (TJs). ZO-1 and ZO-2 are expressed in both epithelia and endothelia, whereas ZO-3 is exclusively expressed in epithelia. In spite of intensive studies of these TJ MAGUKs, our knowledge of their fu...

journal_title：Molecular and cellular biology

authors： Adachi M,Inoko A,Hata M,Furuse K,Umeda K,Itoh M,Tsukita S

更新日期：2006-12-01 00:00:00

abstract：:Mutations in mitochondrial DNA (mtDNA) cause a variety of relatively rare human diseases and may contribute to the pathogenesis of other, more common degenerative diseases. This stimulates interest in the capacity of mitochondria to repair damage to mtDNA. Several recent studies have shown that some types of damage to...

journal_title：Molecular and cellular biology

authors： Pinz KG,Bogenhagen DF

更新日期：1998-03-01 00:00:00

abstract：:Hydroxyurea (HU) is a DNA replication inhibitor that negatively affects both the elongation and initiation phases of replication and triggers the "intra-S phase checkpoint." Previous work with budding yeast has shown that, during a short exposure to HU, MEC1/RAD53 prevent initiation at some late S phase origins. In th...

journal_title：Molecular and cellular biology

authors： Alvino GM,Collingwood D,Murphy JM,Delrow J,Brewer BJ,Raghuraman MK

更新日期：2007-09-01 00:00:00

abstract：:Human cells lacking functional p53 exhibit a partial deficiency in nucleotide excision repair (NER), the pathway for repair of UV-induced DNA damage. The global genomic repair (GGR) subpathway of NER, but not transcription-coupled repair (TCR), is mainly affected by p53 loss or inactivation. We have utilized mouse emb...

journal_title：Molecular and cellular biology

authors： Smith ML,Ford JM,Hollander MC,Bortnick RA,Amundson SA,Seo YR,Deng CX,Hanawalt PC,Fornace AJ Jr

更新日期：2000-05-01 00:00:00

abstract：:Transcription factor CREB regulates cyclic AMP (cAMP)-dependent gene expression by binding to and activating transcription from cAMP response elements (CREs) in the promoters of target genes. The transcriptional transactivation functions of CREB are activated by its phosphorylation by cAMP-dependent protein kinase A (...

journal_title：Molecular and cellular biology

authors： Vallejo M,Gosse ME,Beckman W,Habener JF

更新日期：1995-01-01 00:00:00

abstract：:The full-length normal and T24 mutant human H-ras proteins and two truncated derivatives of the T24 mutant were expressed efficiently in Escherichia coli. The proteins accumulated to 1 to 5% of total cellular protein, and each was specifically recognized by anti-ras monoclonal antibodies. The two full-length proteins ...

journal_title：Molecular and cellular biology

authors： Gross M,Sweet RW,Sathe G,Yokoyama S,Fasano O,Goldfarb M,Wigler M,Rosenberg M

更新日期：1985-05-01 00:00:00

abstract：:Induction of the prodynorphin gene has been implicated in medium and long-term adaptation during memory acquisition and pain. By 5' deletion mapping and site-directed mutagenesis of the human prodynorphin promoter, we demonstrate that both basal transcription and protein kinase A (PKA)-induced transcription in NB69 an...

journal_title：Molecular and cellular biology

authors： Carrión AM,Mellström B,Naranjo JR

更新日期：1998-12-01 00:00:00

abstract：:Wnt signaling is thought to be mediated via interactions between beta-catenin and members of the LEF-1/TCF family of transcription factors. Here we study the mechanism of transcriptional regulation by LEF-1 in response to a Wnt-1 signal under conditions of endogenous beta-catenin in NIH 3T3 cells, and we examine wheth...

journal_title：Molecular and cellular biology

authors： Hsu SC,Galceran J,Grosschedl R

更新日期：1998-08-01 00:00:00

abstract：:The folate receptor type alpha (FR-alpha) is a promising tumor marker and target. Here, we investigate the mechanistic basis for the tumor specificity and vast overexpression of FR-alpha. Among representative FR-alpha-positive (HeLa and JAR) and FR-alpha-negative (MG63, Caki1, and HT3) cell lines, the transcription ra...

journal_title：Molecular and cellular biology

authors： Zheng X,Kelley K,Elnakat H,Yan W,Dorn T,Ratnam M

更新日期：2003-03-01 00:00:00

abstract：:Initiation of T-lymphocyte-mediated immune responses involves two cellular processes: entry into the cell cycle (G(0)-->G(1)) for clonal proliferation and coordinated changes in surface and secreted molecules that mediate effector functions. However, a point during G(0)-->G(1) beyond which T cells are committed to ent...

journal_title：Molecular and cellular biology

authors： Lea NC,Orr SJ,Stoeber K,Williams GH,Lam EW,Ibrahim MA,Mufti GJ,Thomas NS

更新日期：2003-04-01 00:00:00

abstract：:The importance of c-myc as a target of the Blimp-1 repressor has been studied in BCL-1 cells, in which Blimp-1 is sufficient to trigger terminal B-cell differentiation. Our data show that Blimp-1-dependent repression of c-myc is required for BCL-1 differentiation, since constitutive expression of c-Myc blocked differe...

journal_title：Molecular and cellular biology

authors： Lin KI,Lin Y,Calame K

更新日期：2000-12-01 00:00:00

abstract：:As a prominent characteristic of cell life, the regulation of cell quiescence is important for proper development, regeneration, and stress resistance and may play a role in certain degenerative diseases. However, the mechanism underlying quiescence remains largely unknown. Encysted embryos of Artemia are useful for s...

journal_title：Molecular and cellular biology

authors： Dai L,Ye S,Li HW,Chen DF,Wang HL,Jia SN,Lin C,Yang JS,Yang F,Nagasawa H,Yang WJ

更新日期：2017-03-17 00:00:00

abstract：:Activation of oncogenes or inhibition of WEE1 kinase deregulates cyclin-dependent kinase (CDK) activity and leads to replication stress; however, the underlying mechanism is not understood. We now show that elevation of CDK activity by inhibition of WEE1 kinase rapidly increases initiation of replication. This leads t...

journal_title：Molecular and cellular biology

authors： Beck H,Nähse-Kumpf V,Larsen MS,O'Hanlon KA,Patzke S,Holmberg C,Mejlvang J,Groth A,Nielsen O,Syljuåsen RG,Sørensen CS

更新日期：2012-10-01 00:00:00

abstract：:The NF-kappa B/Rel family of transcription factors participates in the control of a wide array of genes, including genes involved in embryonic development and regulation of immune, inflammation, and stress responses. In most cells, inhibitory I kappa B proteins sequester NF-kappa B/Rel in the cytoplasm. Cellular stimu...

journal_title：Molecular and cellular biology

authors： Antonsson A,Hughes K,Edin S,Grundström T

更新日期：2003-02-01 00:00:00

abstract：:Very little is known about the mechanisms mediating longevities of mRNAs. As a means of identifying potential cis- and trans-acting elements which stabilize an individual mRNA, naturally occurring mutations that decreased stability of the normally long-lived globin mRNA were analyzed. Our previous studies demonstrated...

journal_title：Molecular and cellular biology

authors： Weiss IM,Liebhaber SA

更新日期：1995-05-01 00:00:00

abstract：:Little is known about the regions of RNA polymerase II (RNAPII) that are involved in the process of transcript elongation and interaction with elongation factors. One elongation factor, TFIIS, stimulates transcript elongation by binding to RNAPII and facilitating its passage through intrinsic pausing sites in vitro. I...

journal_title：Molecular and cellular biology

authors： Archambault J,Lacroute F,Ruet A,Friesen JD

更新日期：1992-09-01 00:00:00

abstract：:We analyzed the replication of two unlinked actin genes, ardB and ardC , which are abundantly transcribed in the naturally synchronous plasmodium of the slime mold Physarum polycephalum. Detection and size measurements of single-stranded nascent replication intermediates (RIs) demonstrate that these two genes are conc...

journal_title：Molecular and cellular biology

authors： Bénard M,Lagnel C,Pallotta D,Pierron G

更新日期：1996-03-01 00:00:00

abstract：:The eukaryotic genome is divided into chromosomal domains of distinct gene activities. Transcriptionally silent chromatin tends to encroach upon active chromatin. Barrier elements that can block the spread of silent chromatin have been documented, but the mechanisms of their function are not resolved. We show that the...

journal_title：Molecular and cellular biology

authors： Bi X,Yu Q,Sandmeier JJ,Zou Y

更新日期：2004-03-01 00:00:00